CN209662967U - A kind of basic aluminium sulphate regenerative system based on heat and mass technology - Google Patents
A kind of basic aluminium sulphate regenerative system based on heat and mass technology Download PDFInfo
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- CN209662967U CN209662967U CN201920043465.3U CN201920043465U CN209662967U CN 209662967 U CN209662967 U CN 209662967U CN 201920043465 U CN201920043465 U CN 201920043465U CN 209662967 U CN209662967 U CN 209662967U
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Abstract
The utility model belongs to chemical production technical field.The utility model discloses a kind of basic aluminium sulphate regenerative systems based on heat and mass technology, are sequentially connected and are formed by sulfur removing pregnant solution fluid reservoir, liquid feeding pump, condenser, shaped telescopic tube falling film evaporator；Condenser is made of cylinder under cylinder, condenser on condenser shell, condenser and condenser pipe, and cylinder is connected to condenser shell upper end on condenser, and cylinder is connected to condenser shell lower end under condenser, and condenser pipe is located in condenser shell；Shaped telescopic tube falling film evaporator is made of upper shell, shell, lower shell and scaling film droping heat-transfer pipe, is linked together between upper shell and shell by upper perforated plate, lower shell and shell are linked together by lower perforated plate；Film droping heat-transfer pipe is scaled to be set in shell.It can be improved 6.7~16.3% using the system sulfur dioxide desorption rate in the utility model, basic aluminium sulphate sulfur removing pregnant solution falling liquid film sulfur dioxide desorption rate in shaped telescopic tube may be up to 94.2% or more.
Description
Technical field
The utility model relates to chemical production technical fields, more particularly, to a kind of alkali formula sulphur based on heat and mass technology
Sour aluminium regenerative system.
Background technique
Wet Flue Gas Desulfurization Technology has become the Main Trends of The Development of flue gas desulfurization technique, takes off according to after sulfur dioxide absorption
The processing method of sulphur agent is different, is broadly divided into the non-renewable Wet Flue Gas Desulfurization Technology of absorbent, absorbent Regeneratable wet flue gas
Desulfurization technology.Non-renewable Wet Flue Gas Desulfurization Technology common are Limestone-gypsum Wet Flue Gas Desulfurization Process technology, wet ammonia process desulfurizing
Technology, sea water desulfuration technology etc..However, due to the sulfur dioxide in Regeneratable wet fuel gas desulfurizing technology desulfurizing agent removing flue gas
Afterwards, desulfurizing agent can continue cycling through use after processing.As it can be seen that compared with non-renewable Wet Flue Gas Desulfurization Technology, it is renewable
There is Wet Flue Gas Desulfurization Technology desulfurizing agent can be recycled, comprehensive utilization can be recycled in sulfur dioxide gas, desulphurization cost is lower
The advantages that, there is more broad application prospect.Regeneratable wet fuel gas desulfurizing technology common are Citrate Buffer, oxygen at present
Change magnesium absorption method, sodium sulfite round-robin method, amine process, basic aluminium sulphate-desorption method etc..Researcher to Arbiso process,
Magnesium oxide method, Citrate Buffer, amine process etc. are studied, and in comparison, basic aluminium sulphate-desorption method has preparation
Raw material is cheap and easy to get, and solution chemistry performance is stablized, and desulfuration efficiency is high, and generation product gypsum is commercially valuable, and doctor solution can follow
Ring uses, and technique liquid-gas ratio is small, the SO of recycling2Recycling equal many merits, as a kind of promising desulfurizing agent, in cigarette
Practical application has been carried out in desulfurization technology.
Basic aluminium sulphate aqueous solution is that neutralization reaction occurs by powdered aluminum sulfate and lime stone, filters out stone after standing
The colourless transparent liquid obtained after cream sediment such as reacts shown in (1-1)；
Al2(SO4)3(aq)+3xCaCO3(s)+6xH2O→(1-x)Al2(SO4)3·xAl2O3(aq)+3xCaSO4·2H2O
(s)+3xCO2(g) (1-1)
SO is absorbed in basic aluminium sulphate solution2Effective component be Al2O3, indicated with aluminum amount (a) and basicity (x).Aluminum amount is
Containing total aluminium (with Al in every liter of basic aluminium sulphate solution2O3Meter) quality (g/L), basicity be dissociate Al2O3It accounts for total in solution
The ratio of aluminium.In reaction (1-1), x indicates the basicity of solution.After basic aluminium sulphate solution sulfur dioxide absorption, alkali formula is formed
Aluminum sulfate sulfur removing pregnant solution such as reacts shown in (1-2).Since reaction (1-2) is reversible reaction, can just be made by way of heating
It obtains in basic aluminium sulphate sulfur removing pregnant solution and desorbs sulfur dioxide.But due to Al2(SO3)3There is unstability, alkali formula in the solution
Aluminum sulfate sulfur removing pregnant solution is while desorbing sulfur dioxide, SO3 2-、Al3+Double hydrolysis can occur, such as react (1-3~1-6)
It is shown.Furthermore minute quantity SO3 2-Oxidation reaction can occur, such as react shown in (1-7)；
(1-x)Al2(SO4)3·xAl2(SO3)3(aq)+3x/2O2(g)→Al2(SO4)3(aq) (1-7)
Previous basic aluminium sulphate-desorption method flue gas desulfurization technique research focus is concentrated mainly on to SO2Absorption process, from
Mechanism, dynamics, influence factor, inhibitor etc. have conducted extensive research, and are directed to SO2Desorption process research it is less.
It opens macro wait and experimental study has been carried out to basic aluminium sulphate method of reproduction desulfurization desorption technique in a manner of heating water bath, the results showed that desorption
Liquid is under optimal desorption condition, SO2Desorption efficiency is about 70%.Due to using traditional heating water bath mode, there is heating not
Uniformly, the disadvantages of heating time is long, energy consumption is high.For heating water bath mode there are the shortcomings that, researcher is improved, such as
Zhang Shufeng etc. studies desorption effect plus churned mechanically mode using heating water bath, the results showed that has installed machinery additional
The desorption efficiency of agitating device is only slightly higher than the desorption efficiency for not installing mechanical stirring device additional.High skill etc. then adds using heating water bath
Upper microwave-assisted mode has carried out the experimental study of desorption effect, the results showed that although microwave action may advantageously facilitate desorption anti-
Microwave action desorption is continued to use after answering depth, water bath with thermostatic control desorption to reach home, desorption efficiency also only improves 3~5%.It is overall
For, heating water bath mode only carries out heat transfer in thermo-conducting manner, and basic aluminium sulphate sulfur removing pregnant solution desorbs titanium dioxide
The thermal Finite absorbed when sulphur, the SO desorbed2Mass tranfer coefficient in sulfur removing pregnant solution is also smaller.From basic aluminium sulphate desulfurization
The desorption effect that the reaction mechanism of rich solution desorption sulfur dioxide can be seen that raising sulfur dioxide mainly can be by heating and subtracting
Few SO2Partial pressure.In fact, heating and reduction SO2Its essence of partial pressure is to propose high heat and mass transfer efficiency.
Utility model content
To solve in the prior art, sulfur dioxide desorption effect is poor in basic aluminium sulphate sulfur removing pregnant solution, low efficiency, heats not
, the problems such as desorption time is long, the utility model provide a kind of basic aluminium sulphate regenerative system based on heat and mass technology.
To achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of basic aluminium sulphate regenerative system based on heat and mass technology, by sulfur removing pregnant solution fluid reservoir, liquid feeding pump, condensation
Device, shaped telescopic tube falling film evaporator are sequentially connected composition；Condenser is by cylinder and condensation under cylinder, condenser on condenser shell, condenser
Pipe forms, and cylinder is connected to condenser shell upper end on condenser, and cylinder is connected to condenser shell lower end under condenser, and condenser pipe is located at cold
In condenser shell；Condenser shell side lower is equipped with inlet, and condenser shell side surface upper part is equipped with liquid outlet；Cylinder top on condenser
Equipped with secondary steam import, cylinder bottom is equipped with condensation-water drain under condenser, and cylinder side is exported equipped with sulfur dioxide under condenser；
Shaped telescopic tube falling film evaporator is made of upper shell, shell, lower shell and scaling film droping heat-transfer pipe, is passed through between upper shell and shell
Upper perforated plate links together, and lower shell and shell are linked together by lower perforated plate；Film droping heat-transfer pipe is scaled to be set in shell；On
The side of cylinder is additionally provided with sulfur removing pregnant solution import, and the lower end surface of lower shell is exported equipped with regenerated liquid, and the side of lower shell is equipped with two
Secondary steam (vapor) outlet；Housing side heat source import and thermal source outlet；The liquid outlet of condenser and taking off on shaped telescopic tube falling film evaporator
Sulphur rich solution import is connected, and the secondary steam outlet on shaped telescopic tube falling film evaporator is connected with the secondary steam import on condenser,
The sulfur dioxide outlet of condenser is also connected with vacuum pump.
Shaped telescopic tube is a kind of typical augmentation of heat transfer pipe, by having periodically alternate converging transition and divergent segment to replace structure
At.Shaped telescopic tube is due to having many advantages, such as that heat-transfer effect is good, surface blending is smooth, flow resistance is small, less scaling, preferably as performance
Enhanced heat transfer component is mainly used for monophasic fluid augmentation of heat transfer inside and outside pipe before, the utility model proposes be used for shaped telescopic tube
It is used in falling film evaporator, can be improved the heat transfer coefficient and mass transfer rate of basic aluminium sulphate sulfur removing pregnant solution.
Preferably, liquid feed valve is additionally provided between liquid feeding pump and condenser, the sulfur dioxide outlet of condenser and vacuum pump
Between be additionally provided in purging sulfur dioxide tank, the condensation-water drain of condenser is equipped with condensation penstock.
Vapor etc. of the purging sulfur dioxide tank for being mingled in sulfur dioxide absorption gas, through purging sulfur dioxide tank and
Sulfur dioxide recovery recycles after vacuum pump.
Preferably, the upper shell top of shaped telescopic tube falling film evaporator, which is additionally provided with vacuum degree, adjusts mouth, the vacuum degree
Mouth is adjusted to be connected with vacuum degree control valve.
It is that adjustable shaped telescopic tube falling liquid film steams that the vacuum degree being connected with air, which adjusts mouth and the effect of vacuum degree control valve,
The size of vacuum degree in device scaling film droping heat-transfer pipe is sent out, in order to make basic aluminium sulphate sulfur removing pregnant solution in suitable vacuum degree descending film
Evaporation.
Preferably, the upper end of scaling film droping heat-transfer pipe is higher than at the top of upper perforated plate, the lower end of scaling film droping heat-transfer pipe is lower than
Lower perforated plate bottom.
Preferably, heat source import is set to the lower end of shaped telescopic tube falling film evaporator housing side, thermal source outlet is set to scaling
The upper end of pipe falling film evaporator housing side.
Preferably, scaling film droping heat-transfer pipe is made of contraction pipeline section and expansion pipeline section, shrinks length of pipe section and be greater than expansion
The length of pipeline section.
Preferably, it is 2~10 times for expanding length of pipe section, periodical intercostal that scaling film droping heat-transfer pipe, which shrinks length of pipe section,
Away from 7~20 times for rib depth, rib depth is the 3~15% of caliber, and caliber size range is 10~60mm, and wall thickness is 1~2mm.
Wherein rib spacing (P in Fig. 2) refers to one section of contraction length of pipe section (P in Fig. 21) and one section of expansion length of pipe section
(the P in Fig. 22The sum of), rib deep (e in Fig. 2), which refers to, shrinks pipeline section or expansion pipeline section caliber maximum and hanging down at caliber minimum
Directly in scaling film droping heat-transfer caliber to distance, the signified caliber size (d in Fig. 2 in the utility modeli) refer to contraction pipeline section
Or the outer tube diameter of expansion pipeline section maximum.
Test proves, basic aluminium sulphate sulfur removing pregnant solution Heat Transfer in Evaporating Falling Film coefficient ratio smooth tube in shaped telescopic tube is high by 17%~
29%, mass tranfer coefficient is high by 33%~69%, shows that basic aluminium sulphate sulfur removing pregnant solution falling liquid film augmentation of heat transfer in shaped telescopic tube pipe passes
Matter significant effect, while also illustrating falling liquid film flow velocity that basic aluminium sulphate sulfur removing pregnant solution is formed in shaped telescopic tube and direction constantly
It changes, so that liquid film turbulence intensity is bigger compared with smooth tube.
Therefore, the utility model has the following beneficial effects:
The utility model is based on basic aluminium sulphate sulfur removing pregnant solution desorption reaction mechanism, proposes the method using falling liquid film evaporation
It is regenerated for basic aluminium sulphate sulfur removing pregnant solution, also shaped telescopic tube is applied and preheats field in falling film evaporation and falling liquid film, is developed
Shaped telescopic tube falling film evaporator；Using the basic aluminium sulphate sulfur removing pregnant solution based on efficient heat transfer mass transfer technology in the utility model
Regenerative system sulfur dioxide desorption rate can be improved 6.7~16.3%, in 0.02~0.1mol/L of sulfur content, aluminium content 10~
30g/L, under conditions of basicity 10~30%, falling liquid film sulfur dioxide desorption rate can be high in shaped telescopic tube for basic aluminium sulphate sulfur removing pregnant solution
Up to 94.2% or more.
Detailed description of the invention
Fig. 1 is one of the basic aluminium sulphate sulfur removing pregnant solution regenerative system based on efficient heat transfer mass transfer technology in the utility model
Kind schematic diagram；
Fig. 2 is the utility model based on scaling in the basic aluminium sulphate sulfur removing pregnant solution regenerative system of efficient heat transfer mass transfer technology
A kind of schematic diagram of pipe falling film evaporator；
In figure: sulfur removing pregnant solution fluid reservoir 1, liquid feeding pump 2, condenser 3, condenser shell 30, cylinder 31 on condenser, under condenser
Cylinder 32, condenser pipe 33, inlet 34, liquid outlet 35, secondary steam import 36, condensation-water drain 37, condensation penstock 38, two
Sulfur oxide outlet 39, shaped telescopic tube falling film evaporator 4, upper shell 40, shell 41, lower shell 42 scale film droping heat-transfer pipe 43, on
Tube sheet 44, lower perforated plate 45 shrink pipeline section 46, expand pipeline section 47, sulfur removing pregnant solution import 48, regenerated liquid outlet 49, secondary steam goes out
Mouth 50, heat source import 51, thermal source outlet 52, vacuum degree adjusting mouth 53, vacuum degree control valve 54, liquid feed valve 5, vacuum pump 6, two
Sulfur oxide purification pot 7；Rib spacing P shrinks length of pipe section P1, expand length of pipe section P2, rib depth e, caliber size di。
Specific embodiment
The technical solution of the utility model is further described With reference to embodiment.
Obviously, described embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.Base
In the embodiments of the present invention, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, fall within the protection scope of the utility model.
In the present invention, if not refering in particular to, all equipment and raw material is commercially available or the industry is normal
, the method in following embodiments is unless otherwise instructed conventional method in that art.
Embodiment 1
As shown in Figure 1, 2, a kind of basic aluminium sulphate regenerative system based on heat and mass technology, by sulfur removing pregnant solution fluid reservoir
1, liquid feeding pump 2, condenser 3, shaped telescopic tube falling film evaporator 4 are sequentially connected composition, and feed liquor is additionally provided between liquid feeding pump and condenser
Valve 5；Condenser is made of cylinder 32 under cylinder 31, condenser on condenser shell 30, condenser and condenser pipe 33, and cylinder connects on condenser
In condenser shell upper end, cylinder is connected to condenser shell lower end under condenser, and condenser pipe is located in condenser shell；Condenser shell-side face
Lower part is equipped with inlet 34, and condenser shell side surface upper part is equipped with liquid outlet 35；Cylinder top is equipped with secondary steam import on condenser
36, cylinder bottom is equipped with condensation-water drain 37 under condenser, and the condensation-water drain of condenser is equipped with condensation penstock 38, condenser
Lower cylinder side is equipped with sulfur dioxide outlet 39；Shaped telescopic tube falling film evaporator is dropped by upper shell 40, shell 41, lower shell 42 and scaling
Film heat-transfer pipe 43 forms, and is linked together between upper shell and shell by upper perforated plate 44, lower shell and shell pass through lower perforated plate
45 link together；It scales film droping heat-transfer pipe to be set in shell, the upper end of scaling film droping heat-transfer pipe is higher than at the top of upper perforated plate, contracting
The lower end of film droping heat-transfer pipe is put lower than lower perforated plate bottom, scaling film droping heat-transfer pipe is made of contraction pipeline section 46 and expansion pipeline section 47,
The length that scaling film droping heat-transfer pipe shrinks pipeline section is 2 times for expanding length of pipe section, and periodical rib spacing is deep 20 times of rib, and rib is deep
It is the 3% of caliber, caliber size range is 10mm, wall thickness 1mm；The side of upper shell is additionally provided with sulfur removing pregnant solution import 48, under
The lower end surface of cylinder is equipped with regenerated liquid outlet 49, and the side of lower shell is equipped with secondary steam outlet 50, housing side heat source import
51 and thermal source outlet 52, heat source import is set to the lower end of shaped telescopic tube falling film evaporator housing side, and thermal source outlet is set to shaped telescopic tube
The upper end of falling film evaporator housing side, the upper shell top of shaped telescopic tube falling film evaporator are additionally provided with vacuum degree and adjust mouth 53, very
Reciprocal of duty cycle adjusts mouth and is connected with vacuum degree control valve 54；The liquid outlet and the sulfur removing pregnant solution on shaped telescopic tube falling film evaporator of condenser
Import is connected, and the secondary steam outlet on shaped telescopic tube falling film evaporator is connected with the secondary steam import on condenser, condenser
Sulfur dioxide outlet be connected with vacuum pump 6, the sulfur dioxide of condenser exports and to be additionally provided with sulfur dioxide between vacuum pump net
Change tank 7.It is pumped vacuum systems that dotted portion, which is dotted line, in figure.
Embodiment 2
As shown in Figure 1, 2, a kind of basic aluminium sulphate regenerative system based on heat and mass technology, by sulfur removing pregnant solution fluid reservoir
1, liquid feeding pump 2, condenser 3, shaped telescopic tube falling film evaporator 4 are sequentially connected composition, and feed liquor is additionally provided between liquid feeding pump and condenser
Valve 5；Condenser is made of cylinder 32 under cylinder 31, condenser on condenser shell 30, condenser and condenser pipe 33, and cylinder connects on condenser
In condenser shell upper end, cylinder is connected to condenser shell lower end under condenser, and condenser pipe is located in condenser shell；Condenser shell-side face
Lower part is equipped with inlet 34, and condenser shell side surface upper part is equipped with liquid outlet 35；Cylinder top is equipped with secondary steam import on condenser
36, cylinder bottom is equipped with condensation-water drain 37 under condenser, and the condensation-water drain of condenser is equipped with condensation penstock 38, condenser
Lower cylinder side is equipped with sulfur dioxide outlet 39；Shaped telescopic tube falling film evaporator is dropped by upper shell 40, shell 41, lower shell 42 and scaling
Film heat-transfer pipe 43 forms, and is linked together between upper shell and shell by upper perforated plate 44, lower shell and shell pass through lower perforated plate
45 link together；It scales film droping heat-transfer pipe to be set in shell, the upper end of scaling film droping heat-transfer pipe is higher than at the top of upper perforated plate, contracting
The lower end of film droping heat-transfer pipe is put lower than lower perforated plate bottom, scaling film droping heat-transfer pipe is made of contraction pipeline section 46 and expansion pipeline section 47,
The length that scaling film droping heat-transfer pipe shrinks pipeline section is 6 times for expanding length of pipe section, and periodical rib spacing is deep 14 times of rib, and rib is deep
It is the 9% of caliber, caliber size range is 35mm, wall thickness 1.5mm；The side of upper shell is additionally provided with sulfur removing pregnant solution import 48,
The lower end surface of lower shell is equipped with regenerated liquid outlet 49, and the side of lower shell is equipped with secondary steam outlet 50, housing side heat source into
Mouth 51 and thermal source outlet 52, heat source import are set to the lower end of shaped telescopic tube falling film evaporator housing side, and thermal source outlet is set to scaling
The upper end of pipe falling film evaporator housing side, the upper shell top of shaped telescopic tube falling film evaporator are additionally provided with vacuum degree and adjust mouth 53,
Vacuum degree adjusts mouth and is connected with vacuum degree control valve 54；The liquid outlet of condenser and the desulfurization richness on shaped telescopic tube falling film evaporator
Liquid import is connected, and the secondary steam outlet on shaped telescopic tube falling film evaporator is connected with the secondary steam import on condenser, condenses
The sulfur dioxide outlet of device is connected with vacuum pump 6, is additionally provided with sulfur dioxide between the sulfur dioxide outlet of condenser and vacuum pump
Purification pot 7.It is pumped vacuum systems that dotted portion, which is dotted line, in figure.
Embodiment 3
As shown in Figure 1, 2, a kind of basic aluminium sulphate regenerative system based on heat and mass technology, by sulfur removing pregnant solution fluid reservoir
1, liquid feeding pump 2, condenser 3, shaped telescopic tube falling film evaporator 4 are sequentially connected composition, and feed liquor is additionally provided between liquid feeding pump and condenser
Valve 5；Condenser is made of cylinder 32 under cylinder 31, condenser on condenser shell 30, condenser and condenser pipe 33, and cylinder connects on condenser
In condenser shell upper end, cylinder is connected to condenser shell lower end under condenser, and condenser pipe is located in condenser shell；Condenser shell-side face
Lower part is equipped with inlet 34, and condenser shell side surface upper part is equipped with liquid outlet 35；Cylinder top is equipped with secondary steam import on condenser
36, cylinder bottom is equipped with condensation-water drain 37 under condenser, and the condensation-water drain of condenser is equipped with condensation penstock 38, condenser
Lower cylinder side is equipped with sulfur dioxide outlet 39；Shaped telescopic tube falling film evaporator is dropped by upper shell 40, shell 41, lower shell 42 and scaling
Film heat-transfer pipe 43 forms, and is linked together between upper shell and shell by upper perforated plate 44, lower shell and shell pass through lower perforated plate
45 link together；It scales film droping heat-transfer pipe to be set in shell, the upper end of scaling film droping heat-transfer pipe is higher than at the top of upper perforated plate, contracting
The lower end of film droping heat-transfer pipe is put lower than lower perforated plate bottom, scaling film droping heat-transfer pipe is made of contraction pipeline section 46 and expansion pipeline section 47,
The length that scaling film droping heat-transfer pipe shrinks pipeline section is 10 times for expanding length of pipe section, and periodical rib spacing is deep 7 times of rib, and rib is deep
It is the 15% of caliber, caliber size range is 60mm, wall thickness 2mm；The side of upper shell is additionally provided with sulfur removing pregnant solution import 48, under
The lower end surface of cylinder is equipped with regenerated liquid outlet 49, and the side of lower shell is equipped with secondary steam outlet 50, housing side heat source import
51 and thermal source outlet 52, heat source import is set to the lower end of shaped telescopic tube falling film evaporator housing side, and thermal source outlet is set to shaped telescopic tube
The upper end of falling film evaporator housing side, the upper shell top of shaped telescopic tube falling film evaporator are additionally provided with vacuum degree and adjust mouth 53, very
Reciprocal of duty cycle adjusts mouth and is connected with vacuum degree control valve 54；The liquid outlet and the sulfur removing pregnant solution on shaped telescopic tube falling film evaporator of condenser
Import is connected, and the secondary steam outlet on shaped telescopic tube falling film evaporator is connected with the secondary steam import on condenser, condenser
Sulfur dioxide outlet be connected with vacuum pump 6, the sulfur dioxide of condenser exports and to be additionally provided with sulfur dioxide between vacuum pump net
Change tank 7.It is pumped vacuum systems that dotted portion, which is dotted line, in figure.
Basic aluminium sulphate regenerative system by the utility model based on heat and mass technology carries out basic aluminium sulphate desulfurization
The regenerated process of rich solution:
In basic aluminium sulphate sulfur removing pregnant solution regenerative system, the basic aluminium sulphate desulfurization that is stored in sulfur removing pregnant solution fluid reservoir
Rich solution is pumped into condenser by liquid feeding pump, is entered from the inlet of condenser from liquid outlet and is exported, this process is first by alkali formula sulphur
Sour aluminium sulfur removing pregnant solution preheating, then enters shaped telescopic tube falling film evaporator by sulfur removing pregnant solution import, in shaped telescopic tube falling film evaporator
The desorption reaction that sulfur dioxide is realized in film droping heat-transfer pipe is scaled, basic aluminium sulphate sulfur removing pregnant solution becomes regenerating alkali formula sulphur after reaction
Sour aluminum solutions, regenerating alkali formula aluminum sulfate solution recycle, and regenerating alkali formula aluminum sulfate solution, which may continue as desulfurizing agent circulation, to be made
With；In addition to regenerating alkali formula aluminum sulfate solution, moreover it is possible to obtain secondary steam, main group of secondary steam becomes sulfur dioxide, by two
Secondary steam output is passed through in condenser, has both played the role of condensing secondary steam, moreover it is possible to which preheating passes through the alkali formula sulfuric acid of condenser
Aluminium sulfur removing pregnant solution, secondary steam is divided into condensed water and sulfur dioxide after condensation, discharges after condensing hot air furnace or detection, titanium dioxide
Sulphur recycling and reusing after vacuum pump after purging sulfur dioxide tank removes vapor etc., furthermore after purging sulfur dioxide tank
Vacuum pump plays the role of maintaining whole system vacuum degree；Shaped telescopic tube falling film evaporator is also required to be passed through heat source progress heat exchange simultaneously
Make basic aluminium sulphate sulfur removing pregnant solution that desorption reaction occur, the heat source that heat source here can be liquid is also possible to gaseous heat
Source, in shaped telescopic tube falling film evaporator, basic aluminium sulphate sulfur removing pregnant solution passes through from scaling film droping heat-transfer pipe therein, heat source from
Scaling film droping heat-transfer pipe China and foreign countries pass through.
It should be understood that those skilled in the art, can be improved or be become according to the above description
It changes, and all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (8)
1. a kind of basic aluminium sulphate regenerative system based on heat and mass technology, it is characterised in that:
It is sequentially connected and is formed by sulfur removing pregnant solution fluid reservoir, liquid feeding pump, condenser, shaped telescopic tube falling film evaporator；
The condenser is made of cylinder under cylinder, condenser on condenser shell, condenser and condenser pipe, and cylinder connects on the condenser
In condenser shell upper end, cylinder is connected to condenser shell lower end under the condenser, and the condenser pipe is located in condenser shell；Institute
Condenser shell side lower is stated equipped with inlet, the condenser shell side surface upper part is equipped with liquid outlet；Cylinder top on the condenser
End is equipped with secondary steam import, and cylinder bottom is equipped with condensation-water drain under the condenser, and cylinder side is equipped with two under the condenser
Sulfur oxide outlet；
The shaped telescopic tube falling film evaporator by upper shell, shell, lower shell and scaling film droping heat-transfer pipe form, the upper shell and
It is linked together between shell by upper perforated plate, the lower shell and shell are linked together by lower perforated plate；The scaling
Film droping heat-transfer pipe is set in shell；The side of the upper shell is additionally provided with sulfur removing pregnant solution import, and the lower end surface of the lower shell is set
There is regenerated liquid outlet, the side of the lower shell is exported equipped with secondary steam；The housing side heat source import and thermal source outlet；
The liquid outlet of the condenser is connected with the sulfur removing pregnant solution import on shaped telescopic tube falling film evaporator, and the shaped telescopic tube falling liquid film steams
Secondary steam outlet on hair device is connected with the secondary steam import on condenser, the sulfur dioxide of the condenser export also with
Vacuum pump is connected.
2. a kind of basic aluminium sulphate regenerative system based on heat and mass technology according to claim 1, it is characterised in that:
Liquid feed valve is additionally provided between the liquid feeding pump and condenser, between the sulfur dioxide outlet of the condenser and vacuum pump also
Equipped in purging sulfur dioxide tank, the condensation-water drain of the condenser is equipped with condensation penstock.
3. a kind of basic aluminium sulphate regenerative system based on heat and mass technology according to claim 1 or 2, feature exist
In:
The upper shell top of the shaped telescopic tube falling film evaporator is additionally provided with vacuum degree and adjusts mouth, and the vacuum degree adjusts mouth and true
Reciprocal of duty cycle control valve is connected.
4. a kind of basic aluminium sulphate regenerative system based on heat and mass technology according to claim 1 or 2, feature exist
In:
The upper end of the scaling film droping heat-transfer pipe is higher than at the top of upper perforated plate, and the lower end of the scaling film droping heat-transfer pipe is lower than lower perforated plate
Bottom.
5. a kind of basic aluminium sulphate regenerative system based on heat and mass technology according to claim 1 or 2, feature exist
In:
The heat source import is set to the lower end of shaped telescopic tube falling film evaporator housing side, and the thermal source outlet is set to shaped telescopic tube
The upper end of falling film evaporator housing side.
6. a kind of basic aluminium sulphate regenerative system based on heat and mass technology according to claim 1 or 2, feature exist
In:
The scaling film droping heat-transfer pipe is made of contraction pipeline section and expansion pipeline section, and the contraction length of pipe section is greater than expansion pipeline section
Length.
7. a kind of basic aluminium sulphate regenerative system based on heat and mass technology according to claim 6, it is characterised in that:
The length that the scaling film droping heat-transfer pipe shrinks pipeline section is at least twice of expansion length of pipe section.
8. a kind of basic aluminium sulphate regenerative system based on heat and mass technology according to claim 1 or 2, feature exist
In:
The length that the scaling film droping heat-transfer pipe shrinks pipeline section be to expand 2~10 times of length of pipe section, rib spacing be rib depth 7~
20 times, rib depth is the 3~15% of caliber, and caliber size range is 10~60mm, and wall thickness is 1~2mm.
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| CN110935304A (en) * | 2019-12-02 | 2020-03-31 | 内蒙古工业大学 | Basic aluminum sulfate regeneration desulfurization method based on inhibition of oxidation and multi-field synergistic desorption |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935304A (en) * | 2019-12-02 | 2020-03-31 | 内蒙古工业大学 | Basic aluminum sulfate regeneration desulfurization method based on inhibition of oxidation and multi-field synergistic desorption |
| CN110935304B (en) * | 2019-12-02 | 2021-10-12 | 内蒙古工业大学 | Basic aluminum sulfate regeneration desulfurization method based on inhibition of oxidation and multi-field synergistic desorption |
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