CN204522698U - A kind of sea water desulfuration circulatory system - Google Patents
A kind of sea water desulfuration circulatory system Download PDFInfo
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- CN204522698U CN204522698U CN201520193487.XU CN201520193487U CN204522698U CN 204522698 U CN204522698 U CN 204522698U CN 201520193487 U CN201520193487 U CN 201520193487U CN 204522698 U CN204522698 U CN 204522698U
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Abstract
The utility model discloses a kind of sea water desulfuration circulatory system, comprise: supply reservoir (1), absorption tower (2), aeration tank (3) and purifying column (4), described supply reservoir (1), absorption tower (2), aeration tank (3) are connected by circulating line (5) in turn with purifying column (4).The utility model is by utilizing the sea water desulfuration circulatory system, especially by setting up purifying column, and by supply reservoir, absorption tower, aeration tank and the purifying column composition circulatory system, make seawater after the post processing of aeration tank, the seawater of 50% enters purifying column and softens, seawater after softening enters supply reservoir again, thus reduce extra large hardness of water on the one hand, reduce the probability of line clogging, corrosion, also improve alkalinity of seawater on the other hand, decrease the seawater supply of supply reservoir, improve desulfuration efficiency.
Description
Technical field
The utility model relates to a kind of sea water desulfuration circulatory system, belongs to flue gas desulfurization technique field.
Background technology
Study of Desulfurization Technique is a kind of method utilizing the basicity of seawater to remove sulfur dioxide in flue gas, when carrying out sea water desulfuration process, common way is directly passed in seawater by flue gas, a large amount of seawater is utilized to absorb, to reduce the sulfur content (if application number is for " a kind of sintering fume seawater desulfurization technique and the desulphurization system " disclosed in the application for a patent for invention of 201010291585.9) in flue gas.But still there is following shortcoming in existing sea water desulfuration technology:
Large usage quantity, the purposes of 1, carrying out seawater during desulfurization process are single, and rate of sulphur expulsion is slow simultaneously, efficiency is low;
2, traditional handicraft adopts the single-line type structure of seawater supply system-sulfur dioxide absorption system-restoring sea water system to carry out desulfurization process, but this system is comparatively simple in the integrated treatment of seawater, entrance seawater amount is larger, the energy consumption caused on the one hand is large, seawater is hard water on the other hand, hardness number is comparatively large, thus causes system pipeline fouling, alluvial, clogging comparatively serious, and the large discharge pipeline pressure simultaneously using siphonic water-collecting well seawater to mix with aeration tank can not be ignored;
3, the spray equipment in desulfurizer, the injection diameter of setting is little, number is many, cause shower water flow velocity slow, and spray orifice easily blocks, processing difficulties; In addition, traditional spray equipment fluid distrbution uneven (namely the mass flow discrepancy of spray orifice is even), flow velocity is also not ideal enough simultaneously, thus causes desulfuration efficiency low;
4, flue gas is directly discharged by gas outlet after spray equipment process, but the exhaust gas dust concentration of discharging is higher (reaches 43.52mg/Nm
3), larger to the harmfulness of environment;
5, the desulfuration efficiency of desulfurizing tower is low, and the single desulfurizing tower to certain form improves and can not increase substantially desulfuration efficiency, thus limits the development of sea water desulfuration technology.
Utility model content
The purpose of this utility model is, a kind of sea water desulfuration circulatory system is provided, it effectively can solve problems of the prior art, especially the large usage quantity of seawater during desulfurization process is carried out, rate of sulphur expulsion is slow simultaneously, efficiency is low, and due to seawater hardness number comparatively large, cause the problem that line clogging, corrosion are comparatively serious.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of sea water desulfuration circulatory system, comprise: supply reservoir, absorption tower, aeration tank and purifying column, described supply reservoir, absorption tower, aeration tank are connected by circulating line in turn with purifying column.
Preferably, described absorption tower comprises: multiple ultrasonic generator, described multiple ultrasonic generators are arranged on the inwall on absorption tower uniformly, by utilizing ultrasonic generator to replace packing layer in absorption tower, and ultrasonic generator adopts single-frequency field or mixing field, the large molecule flue gas imported in seawater is broken into Small molecular, thus bubble diameter is declined, bobble rise velocity slows down, gas holdup increases, namely ultrasonic generator improves desulfurization rate further, increases desulfuration efficiency; In addition utilize the ultrasonic generator in the utility model, in conjunction with digital type intelligent concrete supersonic reflectoscope, also can detect the structural strength in absorption tower.
In the utility model, there is following relation in the ultrasonic frequency f that ultrasonic generator sends and absorption tower tower height h:
f＝nc/h；
Wherein, f is the ultrasonic frequency that ultrasonic generator sends, and n is positive integer, and c is the ultrasonic velocity that ultrasonic generator sends, h is absorption tower tower height, and absorption tower tower height h and hyperacoustic quarter-wave λ is multiple proportion (i.e. h=n λ).
Preferably, the number of ultrasonic generator is 4, simultaneously, the frequency of each ultrasonic generator is respectively f=c/h, f=2c/h, f=3c/h and f=5c/h, thus make to form multiple frequency ultrasonic field in absorption tower, and desulfuration efficiency maximum (energy consumption of ultrasonic generator, resonance and its desulfuration efficiency reach maximum balance).
Preferred, described absorption tower also comprises: shower water pipeline and spray equipment, and wherein, shower water pipeline is fixed on the inwall on absorption tower; Spray equipment comprises: water-locator and water distributor, and water-locator is fixedly connected with shower water pipeline, and water distributor is located on water-locator; Described water-locator comprises: spray drenches head and multiple layer metal grid, and described metal grill is located at spray and is drenched between head and shower water pipeline; The top that spray drenches head is provided with multiple spray orifice; Described water-locator also comprises water accepting layer, described water accepting layer is located between metal grill and shower water pipeline, thus secondary or repeatedly water distribution can be realized by multiple layer metal grid, and control the size of spray equipment effective aperture, water droplet is dispersed into the fine liquid particles that particle diameter is different, be attached to flat plate wall under the effect of the gas from bottom to top, play the effect of water distribution uniformity, avoid drop and be concentrated into current; Caloic simultaneously between grid between drop and air-flow exchanges the current-sharing effect enhancing convection heat transfer' heat-transfer by convection mass transfer.
Preferred further, the mesh shape of described metal grill is corrugated, and the sectional area of water distributor is more than or equal to 3 times of each spray orifice sectional area sum, thus can increase cloth water area, make the cloth water area uniformity maximum simultaneously, further increase desulfuration efficiency.
Further, described absorption tower also comprises: gas outlet and screen cloth, and described screen cloth is located at the below of gas outlet and is fixedly connected with the inwall on absorption tower, thus can reduce exhaust gas dust concentration, reduces discharge flue gas to the harmfulness of environment.
In the aforesaid sea water desulfuration circulatory system, described screen cloth is phenolic resins class nanoscale screen cloth, the aperture of screen cloth is 10 ~ 100nm, thus dust can be made to deposit in one end of screen cloth and exhaust outlet gas pressure effectively can be prevented excessive and reduce the problem of pipeline life, this screen cloth acid-resisting burn into is high temperature resistant simultaneously, the dust of the overwhelming majority in flue gas can be filtered out, make dust-collecting efficiency be greater than 99%.
The sea water desulfuration circulatory system of the present utility model, also comprise: destilling tower, described destilling tower is connected with aeration tank by circulating line, a part of seawater after the process of aeration tank flows into purifying column and carries out sofening treatment, another part flows into destilling tower, thus while lot of pure water can be produced, obtain crystal, achieve the comprehensive utilization of seawater.
Preferably, the utility model also comprises: SO
2detector, temperature-detecting device, electric control valve, flow detector, feedback controller, feedforward controller and programmable logic controller (PLC), be equipped with SO in described supply reservoir, absorption tower, aeration tank, purifying column and destilling tower
2detector and temperature-detecting device, the circulating line of the porch of supply reservoir, absorption tower, aeration tank, purifying column and destilling tower is equipped with electric control valve and flow detector, described flow detector is located at supply reservoir, absorption tower, aeration tank, purifying column or between destilling tower and electric control valve, described feedback controller respectively with SO
2detector, temperature-detecting device are connected with programmable logic controller (PLC), and described programmable logic controller (PLC) is connected with feedforward controller and electric control valve respectively, thus are ensureing the SO of expection
2the operation of seawater circulation is accurately controlled while removal efficiency.
Compared with prior art, the utility model is by utilizing the sea water desulfuration circulatory system, especially by setting up purifying column, and by supply reservoir, absorption tower, aeration tank and the purifying column composition circulatory system, make seawater after the post processing of aeration tank, the seawater of 50% enters purifying column and softens, seawater after softening enters supply reservoir again, thus reduce extra large hardness of water on the one hand, reduce pipeline and desulfurizer fouling, alluvial, blocking, the probability of corrosion, also improve alkalinity of seawater on the other hand, decrease the seawater supply of supply reservoir, improve desulfuration efficiency, additionally by setting up destilling tower, make the seawater of another part in aeration tank enter distilling apparatus, thus produce lot of pure water, obtain crystal simultaneously, achieve the comprehensive utilization of seawater.Show according to mass data statistics: by adopting the circulatory system in the utility model, thus decrease supply reservoir 49.44% entrance seawater amount, the lowered hardness of whole system seawater 34.68% ~ 65.32% (wherein, the hardness number on supply reservoir and absorption tower is reduced to 50.00%, absorption tower is reduced to 34.68%, aeration tank is reduced to 65.32%), the utility model need not adopt the mode of siphonic water-collecting well seawater and aeration tank sea water mixing being discharged again simultaneously, but aeration tank residual seawater is converted into pure water discharge through destilling tower, avoid the operating pressure of large discharge pipeline, also reduce corrosive pipeline, blocking, the phenomenon of alluvial.In addition, by utilizing ultrasonic generator to replace packing layer in the utility model absorption tower, and ultrasonic generator adopts single-frequency field or mixing field, the large molecule flue gas imported in seawater is broken into Small molecular, thus bubble diameter is declined, bobble rise velocity slows down, and gas holdup increases, thus desulfurization rate can be promoted further, increase desulfuration efficiency; And utilize ultrasonic generator in the utility model, in conjunction with digital type intelligent concrete supersonic reflectoscope, also can detect the structural strength in absorption tower, be convenient to maintenance, management.In addition, secondary or repeatedly water distribution is achieved by logical multiple layer metal grid in the utility model, the size of spray equipment effective aperture can be controlled accurately, water droplet is dispersed into the fine liquid particles that particle diameter is different, flat plate wall is attached under the effect of the gas from bottom to top, play the effect of water distribution uniformity, avoid drop and be concentrated into current; Caloic simultaneously between grid between drop and air-flow exchanges the current-sharing effect enhancing convection heat transfer' heat-transfer by convection mass transfer.In addition, the mesh shape of the metal grill described in the utility model is corrugated, and the sectional area of water distributor is more than or equal to 3 times of each spray orifice sectional area sum, thus cloth water area can be increased, make that the cloth water area uniformity is maximum and flow velocity is also higher simultaneously, thus further increase desulfuration efficiency.In addition, the utility model is by arranging screen cloth, described screen cloth is phenolic resins class nanoscale screen cloth, the aperture of screen cloth is 10 ~ 100nm, thus dust can be made to deposit in one end of screen cloth and exhaust outlet gas pressure effectively can be prevented excessive and reduce the problem of pipeline life, this screen cloth acid-resisting burn into is high temperature resistant simultaneously, can filter out the dust of the overwhelming majority in flue gas, make dust-collecting efficiency be greater than 99%, reduce the harmfulness to environment.Show according to mass data statistics, after adopting absorption tower of the present utility model, desulfuration efficiency can further improve 8%.Finally, the utility model arranges SO by being equipped with in described supply reservoir, absorption tower, aeration tank, purifying column and destilling tower
2detector and temperature-detecting device, the circulating line of the porch of supply reservoir, absorption tower, aeration tank, purifying column and destilling tower all arranges electric control valve and flow detector, described flow detector is located at supply reservoir, absorption tower, aeration tank, purifying column or between destilling tower and electric control valve, described feedback controller respectively with SO
2detector, temperature-detecting device are connected with programmable logic controller (PLC), and described programmable logic controller (PLC) is connected with feedforward controller and electric control valve respectively, thus can be controlled the accurate operation of seawater circulation by interaction relation.The utility model, by improving absorption tower, improves desulfuration efficiency, increases desulfurization rate, and extend the tower body life-span, slow down corrosive pipeline.
Inventor finds through a large amount of development tests, by the principle with bubble tower, absorption tower is designed, with the pattern of packed tower, absorption tower structure is improved, ultrasonic generator is especially set on the inwall on absorption tower large molecule flue gas is broken into Small molecular, by arranging shower water pipeline and spray equipment carries out double absorption to flue gas, consider the impact of many factors for desulfuration efficiency, go out after ASPEN PLUS calculates, adopt desulfurizer of the present utility model desulfuration efficiency can be increased to 97.1%.In addition, the utility model adopts DTM (Design Transducers Method) to calculate, from four aspects such as the sound intensity distribution of multiple frequency ultrasonic field, bubble radius, bobble rise velocity, gas holdups, desulfurization absorption process is analyzed, draw: absorption tower can increase substantially desulfuration efficiency under the effect of ultrasonic field; In addition, by arranging spray equipment in absorption tower, thus from the angle of two time water grids, enhance the effect of auxiliary air and heat transfer water mass transfer, screen cloth is set by the exit on absorption tower simultaneously, suspension in flue gas is filtered, thus makes the concentration of suspended particles in flue gas level off to 0.In addition, inventor finds through a large amount of development tests: in sweetening process, if softened by all seawater, then owing to can improve sodium, the isoionic content of potassium in softening process, the isoionic content of sodium, potassium rises and will cause the decline of desulfuration efficiency; If do not soften seawater in sweetening process, then acid-base material can be caused to roll up, thus meeting heavy corrosion desulfurizer, cause desulfuration efficiency sharply to decline simultaneously; And only have utilize purifying column to circulate to 50% seawater (aeration tank process after 50% seawater) carry out sofening treatment, seawater supply reservoir and former sea water mixing is entered again after process, thus decrease the seawater consumption of 50%, greatly reduce intrasystem seawater hardness number, reduce the phenomenon of corrosive pipeline, blocking, alluvial; Another part seawater after aeration tank process is simultaneously converted into distilled water/distillation gas by destilling tower and utilizes for secondary, achieves the comprehensive utilization of seawater.
Specifically, in order to verify above-mentioned effect, inventors performed following experimental study:
One, seawater consumption and the research of seawater hardness
Owing to adopting former seawater to carry out desulfurization in former Deuslfurizing system for sea water, seawater is hard water, and fouling, alluvial, blocking, phenomenon are serious; Seawater desulfurizing process is suitable for more than 100MW unit simultaneously, and namely seawater flow is 4500m
3, flue gas flow is 1000000m
3above, consider above two kinds of factors, the model being namely applicable to seawater desulfurizing process is large discharge model, and the utility model adopts international ASPEN PLUS to calculate.Because absorption process is complicated, do not have now complete theory can explain all changes in absorption process, therefore the utility model is taked to control unitary variant to calculate desulfuration efficiency, detailed process and result as follows:
1. for the correction of flue gas variable
Flue gas flow is variable, and other amounts are constant, and along with flue gas flow declines, desulfuration efficiency rises;
SO in flue gas
2concentration is variable, and other amounts are constant, along with SO
2concentration declines, and desulfuration efficiency rises, but downward trend is not obvious.
Smoke temperature change, other amounts are constant, and along with flue-gas temperature declines, desulfuration efficiency rises.
2. for the correction of bubble variable
Bubble radius is variable, and other amounts are constant, and along with the decline of bubble radius, desulfuration efficiency rises (see foregoing).
3. for the correction of seawater variable
Ca
2+concentration is variable, and other amounts are constant, along with Ca
2+the decline of concentration, desulfuration efficiency declines, but downward trend is not obvious;
Mg
2+concentration is variable, and other amounts are constant, along with Mg
2+the decline of concentration, desulfuration efficiency declines, but downward trend is not obvious;
CO
3 2-concentration is variable, and other amounts are constant, along with CO
3 2-the decline of concentration, desulfuration efficiency rises;
HCO
3 -concentration is variable, and other amounts are constant, along with HCO
3 -the decline of concentration, desulfuration efficiency rises;
Seawater flow is variable, and other amounts are constant, and along with seawater flow declines, desulfuration efficiency declines;
Liquid-gas ratio is variable, and other amounts are constant, and along with liquid-gas ratio declines, desulfuration efficiency declines.
Inventor finds after carrying out lot of experiments research:
1. due to hardness number (Ca
2+, Mg
2+content) little on desulfuration efficiency impact, therefore can by the mode of seawater softening being carried out utilize the secondary of seawater;
2.CO
3 2-/ HCO
3 -ion-conductance is high on desulfuration efficiency impact on concentration, and CO
3 2-/ HCO
3 -ion-conductance is higher to concentration, and desulfuration efficiency is larger, therefore can be undertaken by the mode concentrated by seawater utilizing the secondary of seawater;
3. the reduction of seawater flow can reduce desulfuration efficiency, and therefore the secondary of seawater utilizes needs by former seawater/pure water as a supplement;
4. contain other ions in seawater, as Na
+, K
+ion concentration significantly rises and will reduce desulfuration efficiency, therefore concentrates/soften the concentration should noting other ions to seawater.
Therefore, by arranging purifier in the utility model, especially softening plant (i.e. purifying column), forms EGR, makes the seawater softening after aeration, reduces seawater hardness number, prevents scaling, blocking, alluvial, promotes CO
3 2-/ HCO
3 -ion-conductance to improve desulfuration efficiency to concentration, mixes former seawater simultaneously and prevents Na
+, K
+plasma concentration is too high.Because in former seawater, softening seawater, ion concentration is fixed, therefore by calculating above factor of influence, with CO
3 2-/ HCO
3 -ion-conductance is to concentration, Na
+(K
+) be independent variable, desulfuration efficiency is dependent variable, and calculate most suitable proportioning, result of calculation shows, by best results during sea water mixing after 50% former seawater and 50% sofening treatment (seawater consumption is minimum, and seawater hardness number is minimum) simultaneously.
Aeration tank residue 50% is converted into distilled water/distillation gas by destilling tower.
Two, the research of desulfuration efficiency and desulfurization rate
Present stage improves for traditional seawater desulfurizing process, if improve desulfuration efficiency, then can reduce desulfurization rate; If raising desulfurization rate, then desulfuration efficiency can be reduced.The present inventor is through a large amount of experimental studies, the method of filling water space with gas calculates van der Waals equation, hydration dissolving law, Herry law, solve van der Waals equation to draw: when gas radius is close with hydrone interstitial radii, absorption efficiency is the highest; Simultaneous verification hydration is dissolved law and is drawn: when bubble radius is very little, absorption efficiency can reach just infinite; Said two devices summation meets Herry law, can improve desulfuration efficiency; And said process can represent with Arrhenius equation, calking absorbs can improve desulfurization rate, therefore reduces bubble radius can improve desulfuration efficiency and desulfurization rate simultaneously.In the utility model, inventor is that matrix improves with bubble tower, installs ultrasonic generator and carries out ultrasonic vibration, smash flue gas bubble into minute bubbles, thus effectively can improve desulfuration efficiency, promote desulfurization rate simultaneously at tower wall.
In order to simulate this process, inventor adopts DTM (Design Transducers Method) to carry out theory analysis and design to ultrasonic wave, carries out ultrasound modality and harmonic analysis.Bubble characteristic parameter is the important indicator weighing bubbling behaviour, the radial distribution of gas holdup and interaction of gas and liquid behavior in direct decision bubble tower, bubble characteristic parameter mainly comprises Air Bubble Size, the rate of climb, gas holdup etc. simultaneously, and the utility model has mainly carried out experimental study to Air Bubble Size, the rate of climb, the gas holdup regularity of distribution in tower.
First parameter designing is carried out to DTM, hyperacoustic wavelength X is the integral multiple of 1/4th of tower height h, namely ultrasonic wave wavelength X=0.25nh, gets n=2,3, λ minimum of a value when 5, namely λ be 20,50,100kHz, due to c=λ f, namely wavelength is larger, the sound intensity is larger, and the sound intensity of multiple frequency ultrasonic field is greater than the sound intensity of single-frequency ultrasonic field.(wherein, c is speed, and λ is wavelength, and f is frequency)
Bubble produces and after continuously being punctured, can obtain Continuous Rectangular square wave, wherein bubble diameter D and bubble velocity V, bubble duration W
trelevant, and bubble velocity V and axial location L, frequency f are relevant, bubble duration W
tbe proportional to frequency f, coefficient correlation is α, namely meets D=V/W
t=α L/f
2, constant α determines by the radial distribution relation of the multiple frequency ultrasonic field sound intensity.Therefore along with the supersonic frequency sum increase of combining, diameter D reduces, in 20-50-100kHz multifrequency after the match, bubble diameter is minimum with the change of superficial gas velocity, bubble phase is not easily assembled, suitable absorbent being fixed on a certain node by the standing wave field energy that this mixing sound frequency is formed, and now bubble radius is about 10
-6m.
Bobble rise velocity V
avewith bubble velocity V, number of bubbles N
brelevant, bubble velocity V and axial location L, frequency f are relevant, number of bubbles N
bbe inversely proportional to frequency f, proportionality coefficient is, namely meets V
ave=V/N
b=L/N
bdt=β Lf
2, constant beta is determined by the radial distribution relation of the multiple frequency ultrasonic field sound intensity.Along with the supersonic frequency sum of combination is larger, bubble diameter is less, and bubble velocity is also less.This illustrates: ultrasonic energy effectively reduces the rate of climb of bubble, under combination frequency 20-50-100kHz, bubble residence time extends to 11s by 7s, reduces amplitude peak and is about 57%, extend the time of contact of bubble and liquid phase, effectively raise absorption efficiency.
Gas holdup ε
gfor gas phase accounts for the percentage of gas-liquid mixture volume; Gas holdup ε
gwith bubble duration W
trelevant with bubble dt time delay, be namely proportional to the quadratic power of frequency f, proportionality coefficient is γ, that is: ε
g=W
t/ dt=γ Lf
2, constant γ determines by the radial distribution relation of the multiple frequency ultrasonic field sound intensity.Along with the increase of combination frequency, gas holdup increases, and due to hyperacoustic interference superposition, the sound intensity is evenly distributed and sound field intensity is high, is conducive to bubble turbulence, extends bubble residence time, and gas holdup improves, and is conducive to improving absorption efficiency; And show according to mass data statistics: when the number of ultrasonic generator is 4, simultaneously, the frequency of each ultrasonic generator is respectively f=c/h, f=2c/h, f=3c/h and f=5c/h, thus make to form multiple frequency ultrasonic field in absorption tower, and desulfuration efficiency maximum (energy consumption of ultrasonic generator, resonance and its desulfuration efficiency reach maximum balance).
Above parameter alpha, β, γ are bubble characteristic parameter, are determined by point spread function radial in ultrasonic wave tower, and wave function is the superposition of three kinds of square waves.
Accompanying drawing explanation
Fig. 1 is the anatomical connectivity schematic diagram of the circulatory system;
Fig. 2 is the structural representation on absorption tower;
Fig. 3 is the modes of emplacement schematic diagram of ultrasonic generator in absorption tower;
Fig. 4 is SO
2the coordinated control system schematic diagram of detector, temperature-detecting device and flow detector;
Fig. 5 is the Logic Structure Design schematic diagram of whole Desulfurization Control Systems;
Fig. 6 is the structural representation of water-locator;
Fig. 7 is the syndeton schematic diagram of water-locator and water distributor.
Reference numeral: 1-supply reservoir, 2-absorption tower, 3-aeration tank, 4-purifying column, 5-circulating line, 6-ultrasonic generator, 7-shower water pipeline, 8-spray equipment, 9-water-locator, 10-water distributor, 11-spray drenches head, 13-metal grill, 14-spray orifice, 15-water accepting layer, 16-gas outlet, 17-screen cloth, 18-destilling tower, 19-SO
2detector, 20-temperature-detecting device, 21-electric control valve, 22-flow detector, 23-feedback controller, 24-feedforward controller, 25-programmable logic controller (PLC), 26-A valve, 27-admission line, 28-inlet channel, 29-B valve, 30-delivery port.
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Detailed description of the invention
Embodiment 1 of the present utility model: a kind of sea water desulfuration circulatory system, comprising: supply reservoir 1, absorption tower 2, aeration tank 3 and purifying column 4, described supply reservoir 1, absorption tower 2, aeration tank 3 are connected by circulating line 5 in turn with purifying column 4.Described absorption tower 2 comprises: multiple ultrasonic generator 6, and described multiple ultrasonic generators 6 are arranged on the inwall on absorption tower 2 uniformly.Described absorption tower 2 also comprises: shower water pipeline 7 and spray equipment 8, and wherein, shower water pipeline 7 is fixed on the inwall on absorption tower 2; Spray equipment 8 comprises: water-locator 9 and water distributor 10, and water-locator 9 is fixedly connected with shower water pipeline 7, and water distributor 10 is located on water-locator 9; Described water-locator 9 comprises: spray drenches 11 and a multiple layer metal grid 13, and described metal grill 13 is located at spray and is drenched between 11 and shower water pipeline 7; The top that spray drenches 11 is provided with multiple spray orifice 14; Described water-locator 9 also comprises water accepting layer 15, and described water accepting layer 15 is located between metal grill 13 and shower water pipeline 7.The mesh shape of described metal grill 13 is corrugated, and the sectional area of water distributor 10 is more than or equal to 3 times of each spray orifice 14 sectional area sum.Described absorption tower 2 also comprises: gas outlet 16 and screen cloth 17, and described screen cloth 17 is located at the below of gas outlet 16 and is fixedly connected with the inwall on absorption tower 2.Described screen cloth 17 is phenolic resins class nanoscale screen cloth, and the aperture of screen cloth 17 is 10 ~ 100nm.Also comprise: destilling tower 18, described destilling tower 18 is connected with aeration tank 3 by circulating line 5.Also comprise: SO
2detector 19, temperature-detecting device 20, electric control valve 21, flow detector 22, feedback controller 23, feedforward controller 24 and programmable logic controller (PLC) 25, be equipped with SO in described supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 and destilling tower 18
2detector 19 and temperature-detecting device 20, the circulating line 5 of the porch of supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 and destilling tower 18 is equipped with electric control valve 21 and flow detector 22, described flow detector 22 is located at supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 or between destilling tower 18 and electric control valve 21, described feedback controller 23 respectively with SO
2detector 19, temperature-detecting device 20 are connected with programmable logic controller (PLC) 25, and described programmable logic controller (PLC) 25 is connected with feedforward controller 24 and electric control valve 21 respectively.Described absorption tower 2 inwall is coated with (curing type) polytetrahy-drofuran and/or nickel-zinc ferrite coating; Described circulating line 5 by be reinforcing material with glass fibre and goods thereof, synthetic resin is matrix material composite is prepared from.
Embodiment 2: a kind of sea water desulfuration circulatory system, comprising: supply reservoir 1, absorption tower 2, aeration tank 3 and purifying column 4, described supply reservoir 1, absorption tower 2, aeration tank 3 are connected by circulating line 5 in turn with purifying column 4.Described absorption tower 2 comprises: multiple ultrasonic generator 6, and described multiple ultrasonic generators 6 are arranged on the inwall on absorption tower 2 uniformly.Described absorption tower 2 inwall is coated with (curing type) polytetrahy-drofuran and/or nickel-zinc ferrite coating; Described circulating line 5 by be reinforcing material with glass fibre and goods thereof, synthetic resin is matrix material composite is prepared from.
Embodiment 3: a kind of sea water desulfuration circulatory system, comprising: supply reservoir 1, absorption tower 2, aeration tank 3 and purifying column 4, described supply reservoir 1, absorption tower 2, aeration tank 3 are connected by circulating line 5 in turn with purifying column 4.Also comprise: destilling tower 18, described destilling tower 18 is connected with aeration tank 3 by circulating line 5.Also comprise: SO
2detector 19, temperature-detecting device 20, electric control valve 21, flow detector 22, feedback controller 23, feedforward controller 24 and programmable logic controller (PLC) 25, be equipped with SO in described supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 and destilling tower 18
2detector 19 and temperature-detecting device 20, the circulating line 5 of the porch of supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 and destilling tower 18 is equipped with electric control valve 21 and flow detector 22, described flow detector 22 is located at supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 or between destilling tower 18 and electric control valve 21, described feedback controller 23 respectively with SO
2detector 19, temperature-detecting device 20 are connected with programmable logic controller (PLC) 25, and described programmable logic controller (PLC) 25 is connected with feedforward controller 24 and electric control valve 21 respectively.
Embodiment 4: a kind of sea water desulfuration circulatory system, comprising: supply reservoir 1, absorption tower 2, aeration tank 3 and purifying column 4, described supply reservoir 1, absorption tower 2, aeration tank 3 are connected by circulating line 5 in turn with purifying column 4.Described absorption tower 2 comprises: multiple ultrasonic generator 6, and described multiple ultrasonic generators 6 are arranged on the inwall on absorption tower 2 uniformly.Described absorption tower 2 also comprises: shower water pipeline 7 and spray equipment 8, and wherein, shower water pipeline 7 is fixed on the inwall on absorption tower 2; Spray equipment 8 comprises: water-locator 9 and water distributor 10, and water-locator 9 is fixedly connected with shower water pipeline 7, and water distributor 10 is located on water-locator 9; Described water-locator 9 comprises: spray drenches 11 and a multiple layer metal grid 13, and described metal grill 13 is located at spray and is drenched between 11 and shower water pipeline 7; The top that spray drenches 11 is provided with multiple spray orifice 14; Described water-locator 9 also comprises water accepting layer 15, and described water accepting layer 15 is located between metal grill 13 and shower water pipeline 7.Described absorption tower 2 also comprises: gas outlet 16 and screen cloth 17, and described screen cloth 17 is located at the below of gas outlet 16 and is fixedly connected with the inwall on absorption tower 2.Described screen cloth 17 is phenolic resins class nanoscale screen cloth, and the aperture of screen cloth 17 is 10 ~ 100nm.
Embodiment 5: a kind of sea water desulfuration circulatory system, comprising: supply reservoir 1, absorption tower 2, aeration tank 3 and purifying column 4, described supply reservoir 1, absorption tower 2, aeration tank 3 are connected by circulating line 5 in turn with purifying column 4.Described absorption tower 2 comprises: multiple ultrasonic generator 6, and described multiple ultrasonic generators 6 are arranged on the inwall on absorption tower 2 uniformly.Described absorption tower 2 also comprises: shower water pipeline 7 and spray equipment 8, and wherein, shower water pipeline 7 is fixed on the inwall on absorption tower 2; Spray equipment 8 comprises: water-locator 9 and water distributor 10, and water-locator 9 is fixedly connected with shower water pipeline 7, and water distributor 10 is located on water-locator 9; Described water-locator 9 comprises: spray drenches 11 and a multiple layer metal grid 13, and described metal grill 13 is located at spray and is drenched between 11 and shower water pipeline 7; The top that spray drenches 11 is provided with multiple spray orifice 14; Described water-locator 9 also comprises water accepting layer 15, and described water accepting layer 15 is located between metal grill 13 and shower water pipeline 7.The mesh shape of described metal grill 13 is corrugated, and the sectional area of water distributor 10 is more than or equal to 3 times of each spray orifice 14 sectional area sum.
Embodiment 6: a kind of sea water desulfuration circulatory system, comprising: supply reservoir 1, absorption tower 2, aeration tank 3 and purifying column 4, described supply reservoir 1, absorption tower 2, aeration tank 3 are connected by circulating line 5 in turn with purifying column 4.Described absorption tower 2 comprises: multiple ultrasonic generator 6, and described multiple ultrasonic generators 6 are arranged on the inwall on absorption tower 2 uniformly.
Embodiment 7: a kind of sea water desulfuration circulatory system, comprising: supply reservoir 1, absorption tower 2, aeration tank 3 and purifying column 4, described supply reservoir 1, absorption tower 2, aeration tank 3 are connected by circulating line 5 in turn with purifying column 4.
The operation principle of a kind of embodiment of the present utility model:
As shown in Figure 1, temperature-detecting device 20, SO
2detector 19, flow detector 22 three interlock, automatic controlling system circulating line 5 and A valve 26, seawater is made to flow into supply reservoir 1, seawater flows into absorption tower 2 again through circulating line 5 and A valve 26 and carries out desulfurization process, seawater after process enters aeration tank 3 by flowing out bottom absorption tower 2 again through circulating line 5 and A valve 26, the seawater of 50% flows into purifying column 4 through circulating line 5 and A valve 26, the seawater of other 50% flows into destilling tower 18 through circulating line 5 and A valve 26 to carry out distillation and processes, and obtains pure water and crystal.
As shown in Figure 2, outside, absorption tower 2 is provided with admission line 27 and inlet channel 28, gas enters in absorption tower 2 by admission line 27, absorption tower 2 inwall is evenly distributed with ultrasonic generator 6 (as shown in Figure 3), absorption tower 2 periphery is connected with spray equipment 8 by shower water pipeline 7, and gas outlet 16 place is designed with screen cloth 17 simultaneously.Absorption tower 2 controls to be connected with seawater supply reservoir 1 through B valve 29 by the circulatory system, and absorption tower 2 controls delivery port 30 and inlet channel 28 by B valve 29.
As shown in Figure 5, in desulphurization system scheme of the present utility model, the control system of application is dcs (DCS), and whole Desulfurization Control Systems logically presses double-decker design: field control level, process monitoring and management level, and the middle communication system that adopts connects; Wherein, field control level (as shown in Figure 4) adopts the Field Production Data such as all kinds of instrument to collect site pressure, temperature, flow, by PLC and executing agency's (electric control valve etc.) production control process.Process monitoring and management level comprise engineer station and operator station, and engineer station is used for completion system configuration, amendment and lower dress, comprising: database, figure, control algolithm and process i/o block configuration configuration; Operator station is used for carrying out production scene Monitoring and Management, and process chart shows, daily record, alarm logging and management, the functions such as report printing.Profibus-DP fieldbus and I/O module and equipment connection is adopted between process control level and monitoring level, grid adopts 100Mbps redundancy industrial Ethernet, application HSIE communications protocol, for the connection of field control station and system server, completes data and assigns.In Fig. 4, specifically, the utility model is equipped with SO in supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 and destilling tower 18
2detector 19 and temperature-detecting device 20, the circulating line 5 of the porch of supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 and destilling tower 18 is equipped with electric control valve 21 and flow detector 22, described flow detector 22 is located at supply reservoir 1, absorption tower 2, aeration tank 3, purifying column 4 or between destilling tower 18 and electric control valve 21, described feedback controller 23 respectively with SO
2detector 19, temperature-detecting device 20 are connected with programmable logic controller (PLC) 25, and described programmable logic controller (PLC) 25 is connected with feedforward controller 24 and electric control valve 21 respectively.For absorption tower 2, the amount of sulfur contenting in smoke in absorption tower 2 carries out regulating and control primarily of sending into the seawater flow on absorption tower 2, and it controls object is the SO ensureing expection
2removal efficiency.In desulfurizer runs, SO in exhaust gas volumn and flue gas
2concentration and sea water supply amount are the principal elements causing sulfur content change or fluctuation in seawater, and these parameters i.e. monitoring parameter.Be illustrated in figure 4 the multiplex control system of absorption tower 2 maritime interior waters flow, SO
2detector 19 and temperature-detecting device 20 detect the SO in absorption tower 2
2concentration and temperature, be sent to feedback controller 23, and feedback controller 23 is by the SO of setting
2sO in concentration and temperature and seawater
2concentration and temperature compare, and obtain both difference signals and be sent to programmable logic controller (PLC) 25, feedforward controller 24 is used for overcoming exhaust gas volumn and flue gas SO
2concentration and ocean temperature change the change of the seawater flow caused, and send conditioning signal to programmable logic controller (PLC) 25, programmable logic controller (PLC) 25 produces a conditioning signal according to the signal of feedback controller 23 and feedforward controller 24, thus control supply valve (the i.e. electric control valve 21) aperture of supply reservoir 1, flow detector 22 Real-Time Monitoring flows into the seawater flow on absorption tower 2 simultaneously, finally makes the sulfur content in absorption tower remain on the value preset.
As shown in Figure 6, Figure 7, the spray equipment 8 in the utility model comprises: water-locator 9 and water distributor 10, and water-locator 9 is fixedly connected with shower water pipeline 7, and water distributor 10 is located on water-locator 9; Described water-locator 9 comprises: spray drenches 11 and a multiple layer metal grid 13, and described metal grill 13 is located at spray and is drenched between 11 and shower water pipeline 7; The top that spray drenches 11 is provided with multiple spray orifice 14; Described water-locator 9 also comprises water accepting layer 15, described water accepting layer 15 is located between metal grill 13 and shower water pipeline 7, in order to water distribution is even, need to select reasonably to spray aperture, the utility model realizes secondary or repeatedly water distribution effect by adopting multiple layer metal grid 13 on water-locator 9, is controlled the size of effective aperture by metal grill 13.Because considering to there is overlapping phenomenon between grid, the order number of metal grill 13 does selection bigger than normal, and two time water grids are made up of ((grid metalloid mechanism AB type arranges overlapping use) two parts.Wherein, the effect of metal grill 13 is: water droplet is dispersed into the fine liquid particles that particle diameter is different, flat plate wall is attached under gas effect from bottom to top, play the effect (avoiding drop to be concentrated into current) of water distribution uniformity, make the caloic between grid between drop and air-flow exchange the effect, the current balance function that strengthen convection heat transfer' heat-transfer by convection mass transfer.In addition, in order to coutroi velocity, the utility model is by the shape of metal grill 13 on water-locator 9, make corrugated, can increase cloth water area on the one hand, control water distributor 10 sectional area is 3 times of each spray orifice 14 sectional area sum, thus can ensure that normal discharge is even; While making corrugated increase cloth water area on the other hand, the number in aperture increases, and the quantity in hole increases, and cloth water density increases, and flow velocity increases and then desulfuration efficiency increase.Spray equipment 8 pairs of flue gases process, and after the sulfur dioxide in removing flue gas, then, flue gas is again through screen cloth 17, and reduce the dust concentration in flue gas, finally, flue gas is discharged through gas outlet 16.
Claims (8)
1. a sea water desulfuration circulatory system, it is characterized in that, comprise: supply reservoir (1), absorption tower (2), aeration tank (3) and purifying column (4), described supply reservoir (1), absorption tower (2), aeration tank (3) are connected by circulating line (5) in turn with purifying column (4).
2. the sea water desulfuration circulatory system according to claim 1, it is characterized in that, described absorption tower (2) comprising: multiple ultrasonic generator (6), and described multiple ultrasonic generators (6) are arranged on the inwall of absorption tower (2) uniformly.
3. the sea water desulfuration circulatory system according to claim 2, it is characterized in that, described absorption tower (2) also comprises: shower water pipeline (7) and spray equipment (8), wherein, shower water pipeline (7) is fixed on the inwall of absorption tower (2); Spray equipment (8) comprising: water-locator (9) and water distributor (10), water-locator (9) is fixedly connected with shower water pipeline (7), and water distributor (10) is located on water-locator (9); Described water-locator (9) comprising: spray drenches head (11) and multiple layer metal grid (13), and described metal grill (13) is located at spray and is drenched between head (11) and shower water pipeline (7); The top that spray drenches head (11) is provided with multiple spray orifice (14); Described water-locator (9) also comprises water accepting layer (15), and described water accepting layer (15) is located between metal grill (13) and shower water pipeline (7).
4. the sea water desulfuration circulatory system according to claim 3, it is characterized in that, the mesh shape of described metal grill (13) is corrugated, and the sectional area of water distributor (10) is more than or equal to 3 times of each spray orifice (14) sectional area sum.
5. the sea water desulfuration circulatory system according to claim 3, it is characterized in that, described absorption tower (2) also comprises: gas outlet (16) and screen cloth (17), and described screen cloth (17) is located at the below of gas outlet (16) and is fixedly connected with the inwall of absorption tower (2).
6. the sea water desulfuration circulatory system according to claim 5, is characterized in that, described screen cloth (17) is phenolic resins class nanoscale screen cloth, and the aperture of screen cloth (17) is 10 ~ 100nm.
7., according to the arbitrary described sea water desulfuration circulatory system of claim 1 ~ 6, it is characterized in that, also comprise: destilling tower (18), described destilling tower (18) is connected with aeration tank (3) by circulating line (5).
8. the sea water desulfuration circulatory system according to claim 7, is characterized in that, also comprise: SO2 detector (19), temperature-detecting device (20), electric control valve (21), flow detector (22), feedback controller (23), feedforward controller (24) and programmable logic controller (PLC) (25), described supply reservoir (1), absorption tower (2), aeration tank (3), SO2 detector (19) and temperature-detecting device (20) is equipped with, supply reservoir (1) in purifying column (4) and destilling tower (18), absorption tower (2), aeration tank (3), the circulating line (5) of the porch of purifying column (4) and destilling tower (18) is equipped with electric control valve (21) and flow detector (22), described flow detector (22) is located at supply reservoir (1), absorption tower (2), aeration tank (3), purifying column (4) or between destilling tower (18) and electric control valve (21), described feedback controller (23) respectively with SO
2detector (19), temperature-detecting device (20) are connected with programmable logic controller (PLC) (25), and described programmable logic controller (PLC) (25) is connected with feedforward controller (24) and electric control valve (21) respectively.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104815543A (en) * | 2015-04-01 | 2015-08-05 | 东北大学 | Seawater desulphurization circulation system and desulphurization method |
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