CN204093290U - A kind of flue gas desulfur device - Google Patents
A kind of flue gas desulfur device Download PDFInfo
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- CN204093290U CN204093290U CN201420532793.7U CN201420532793U CN204093290U CN 204093290 U CN204093290 U CN 204093290U CN 201420532793 U CN201420532793 U CN 201420532793U CN 204093290 U CN204093290 U CN 204093290U
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Abstract
The utility model provides a kind of flue gas desulfur device, this device comprises: this flue gas desulfur device comprises: absorption tower and the absorbing liquid recovery system be connected between the absorbing liquid outlet on absorption tower and absorbent entrance, wherein, described absorbing liquid recovery system comprises at least one two compartment bipolar membrane electrodialysis device and/or at least one three compartment bipolar membrane electrodialysis device.By technique scheme, the utility model can reclaim absorbing liquid effectively, no longer discharges waste liquid and reduces power consumption.
Description
Technical field
The utility model relates to field of chemical engineering, particularly, relates to a kind of flue gas desulfur device.
Background technology
The mixture of flue gas general reference gas and flue dust.The operation of boiler, industrial furnace, thermal power plant, coke oven, cement plant, blast furnace, open hearth, converter, electric furnace and catalytic cracking (FCC) device etc. chemical industry equipment all can produce a large amount of flue gases.The air pollutants such as a large amount of sulfur and nitrogen oxides contained in flue gas bring series of environmental problems.The discharge reduced containing air pollutants such as sulfur and nitrogen oxides is the task of top priority of protection of the environment.Such as standard GB/T 13271-91 " emission standard of air pollutants for boilers ", GB9078-1996 " industrial furnace atmosphere pollutants emission standards ", GB13223-1996 " fossil-fuel power plant atmospheric pollutant emission standard ", GB16171-1996 " coke oven atmosphere pollutants emission standards " and GB4915-1996 " Airborne Pollutants from Cement Plant discharge standard " define the discharge standard of pollutant in flue gas.Therefore, after desulphurization and denitration and dust removal process must being carried out to flue gas, just can discharge.
In the flue gas desulfurization technique of commercial Application, wet desulphurization is the most frequently used at present and one of comparatively ripe method.Conventional FCC regenerated flue gas absorption process has the WGS wet scrubbing of EXXON company, the THIOPAQ biotechnology of Uop Inc., the EDV wet scrubbing technology etc. of Belco company.Wherein the EDV Wet Flue Gas Desulfurization Technology of Belco company has become industrial gas purification and SO
2one of main method reclaimed.Started commercial Application from 1994, EDV Wet Flue Gas Desulfurization Technology just demonstrates excellent operability and reliability.So far, supporting more than 90 cover catalytic cracking units EDV facility, wherein maximum production capacity is 5Mt/a.But the greatest problem that EDV Wet Flue Gas Desulfurization Technology exists is that this technology can consume large water gaging and NaOH as absorbing liquid, and with the SO in flue gas
2after reaction, be a large amount of sodium sulfate salt solution through oxidation transformation, thus create the emission problem of a large amount of high-salt wastewater.
Utility model content
The purpose of this utility model is to provide a kind of device, and the absorbing liquid that wet desulfurizing and dust collecting system produces is converted into the sodium hydroxide solution of reusable edible by this device, and the sulfuric acid solution of recoverable and SO
2, realize no effuent discharge, and power consumption can be reduced significantly.
To achieve these goals, the utility model provides a kind of flue gas desulfur device, this device comprises: this flue gas desulfur device comprises: absorption tower and the absorbing liquid recovery system be connected between the absorbing liquid outlet on absorption tower and absorbent entrance, wherein, described absorbing liquid recovery system comprises at least one two compartment bipolar membrane electrodialysis device and/or at least one three compartment bipolar membrane electrodialysis device.
Preferably, described absorbing liquid recovery system comprises at least one the two compartment bipolar membrane electrodialysis device, at least one desorber and at least one the three compartment bipolar membrane electrodialysis device that connect successively along absorbing liquid flow direction.
Preferably, described two compartment bipolar membrane electrodialysis utensils have at least one group of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode and the first anode, first negative electrode and two compartment bipolar membrane electrodialysis films between be also provided with the first pole film, the first anode and two compartment bipolar membrane electrodialysis films between be also provided with the second pole film, described two compartment bipolar membrane electrodialysis films are to comprising the first Bipolar Membrane, first cation-exchange membrane and the second Bipolar Membrane, the first alkali room is formed between first Bipolar Membrane and the first cation-exchange membrane, the first salt room is formed between second Bipolar Membrane and the first cation-exchange membrane.
Preferably, described first alkali room is provided with at least one first alkali lye outlet; Described first alkali lye outlet is connected with the absorbent entrance on absorption tower.
Preferably, described two compartment bipolar membrane electrodialysis utensils have at least one group of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode and the first anode, first negative electrode and two compartment bipolar membrane electrodialysis films between be also provided with the first pole film, the first anode and two compartment bipolar membrane electrodialysis films between be also provided with the second pole film, described two compartment bipolar membrane electrodialysis films are to comprising the first Bipolar Membrane, first anion-exchange membrane and the second Bipolar Membrane, the second salt room is formed between first Bipolar Membrane and the first anion-exchange membrane, the first sour room is formed between second Bipolar Membrane and the first anion-exchange membrane.
Preferably, described second salt room is provided with at least one second saline solution outlet; Described second saline solution outlet is connected with the absorbent entrance on absorption tower.
Preferably, described two compartment bipolar membrane electrodialysis utensils have the many groups of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode and the first anode; And adjacent two group of two compartment bipolar membrane electrodialysis film centering, right the second Bipolar Membrane of last group of two compartment bipolar membrane electrodialysis film is as right the first Bipolar Membrane of rear one group of two compartment bipolar membrane electrodialysis film.
Preferably, described three compartment bipolar membrane electrodialysis utensils have at least one group of three compartment bipolar membrane electrodialysis films pair be arranged between the second negative electrode and second plate, second negative electrode and three adjacent compartment bipolar membrane electrodialysis films between be also provided with the 3rd pole film, second plate and three adjacent compartment bipolar membrane electrodialysis films between be also provided with the 4th pole film, described three compartment bipolar membrane electrodialysis films are to comprising the 3rd Bipolar Membrane, second cation-exchange membrane, second anion-exchange membrane and the 4th Bipolar Membrane, the second alkali room is formed between 3rd Bipolar Membrane and the second cation-exchange membrane, the 3rd salt room is formed between second cation-exchange membrane and anion-exchange membrane, the second sour room is formed between second anion-exchange membrane and the 4th Bipolar Membrane.
Preferably, described three compartment bipolar membrane electrodialysis utensils have the many groups of three compartment bipolar membrane electrodialysis films pair be arranged between the second negative electrode and second plate; And adjacent two group of three compartment bipolar membrane electrodialysis film centering, right the 4th Bipolar Membrane of last group of three compartment bipolar membrane electrodialysis film is as right the 3rd Bipolar Membrane of rear one group of three compartment bipolar membrane electrodialysis film.
Preferably, described second alkali room is provided with at least one second alkali lye outlet; Described second sour room is provided with at least one second acid solution outlet; Described second alkali lye outlet is connected with the absorbent entrance on absorption tower.
By technique scheme, the utility model can reclaim absorbing liquid effectively, no longer discharges waste liquid and reduces power consumption.
Other feature and advantage of the present utility model are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for description, is used from explanation the utility model, but does not form restriction of the present utility model with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the flue gas desulfur device structural representation that a kind of preferred embodiment of the utility model provides.
Fig. 2 is the structural representation of the two compartment bipolar membrane electrodialysis devices that a kind of preferred embodiment of the utility model provides.
Fig. 3 is the flue gas desulfur device structural representation that another preferred embodiment of the utility model provides.
Fig. 4 is the structural representation of the two compartment bipolar membrane electrodialysis devices that another preferred embodiment of the utility model provides.
Fig. 5 is the structural representation of the three compartment bipolar membrane electrodialysis devices that a kind of preferred embodiment of the utility model provides.
Description of reference numerals
1 absorption tower 2 solid-liquid separator
3 two compartment bipolar membrane electrodialysis device 4 desorbers
5 three compartment bipolar membrane electrodialysis device 6 absorbing liquid circulating pumps
7 filter 8 liquid drop separators
11 smoke inlet 12 exhanst gas outlets
31 first salt room, alkali rooms 32 first
33 second sour room, salt rooms 34 first
51 second salt room, sour rooms 52 the 3rd
53 second alkali rooms
101 first negative electrode 102 first Bipolar Membrane
103 first cation-exchange membrane 104 second Bipolar Membrane
105 first anode 106 first salt room outlets
107 first salt chamber inlet 108 first alkali chamber inlets
109 first alkali rooms export 113 cation-exchange membranes
114 Bipolar Membrane 130 first pole films
131 second pole film 136 first sour room outlets
137 first sour chamber inlet 138 second salt chamber inlets
139 second salt room outlet 140 first anion-exchange membranes
201 second negative electrode 202 the 3rd Bipolar Membrane
203 second cation-exchange membrane 204 second anion-exchange membranes
205 the 4th Bipolar Membrane 206 second plates
207 second alkali room outlet 208 second sour room outlets
209 the 3rd salt room outlet 210 the 3rd salt chamber inlets
211 second sour chamber inlet 212 second alkali chamber inlets
223 cation-exchange membrane 224 anion-exchange membranes
225 Bipolar Membrane 230 the 3rd pole film
231 the 4th pole films
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
With reference to figure 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the utility model provides a kind of flue gas desulfur device, this device may be used for the desulfurization process of various sulfur-containing smoke gas in chemical field, and described flue gas includes but not limited to the flue gas produced by chemical industry equipments such as boiler, industrial furnace, thermal power plant, coke oven, cement plant, blast furnace, open hearth, converter, electric furnace and catalytic cracking (FCC) devices.
The utility model provides a kind of flue gas desulfur device, this device comprises: this flue gas desulfur device comprises: absorption tower 1 and the absorbing liquid recovery system be connected between the absorbing liquid outlet on absorption tower 1 and absorbent entrance, wherein, described absorbing liquid recovery system comprises at least one two compartment bipolar membrane electrodialysis device 3 and/or at least one three compartment bipolar membrane electrodialysis device 5 of connecting successively along absorbing liquid flow direction.
Wherein, preferably, described absorbing liquid recovery system comprises at least one the two compartment bipolar membrane electrodialysis device 3, at least one desorber 4 and at least one the three compartment bipolar membrane electrodialysis device 5 that connect successively along absorbing liquid flow direction.
Wherein, flue gas can enter absorption tower 1 through the smoke inlet 11 on absorption tower 1, contacts in absorption tower 1 with absorbing liquid, to obtain desulfurization process, then discharges absorption tower 1 through exhanst gas outlet 12.Wherein, described desulfurization process can be carried out separately in absorption tower 1, also can carry out with the process of denitration and/or dedusting simultaneously.
Wherein, the not special requirement of type on described absorption tower 1, as long as the contact of flue gas and absorbent can be completed, include but not limited at least one in plate column, bubble absorbing tower, stirring bubble absorbing tower, injector, Venturi tube, spray tower, packed absorber and film-falling absorption tower.Wherein, preferably, desorber 4 can be vacuum column.
Wherein, described absorbent is the NaOH aqueous solution contained.Described absorbent is entering behind absorption tower 1 and smoke contacts, and the oxysulfide in flue gas is absorbed by absorbent, and the absorbent after contact is converted into absorbing liquid and discharges through absorbing liquid outlet.Containing NaHSO in the absorbing liquid of discharging
3, Na
2sO
3and Na
2sO
4, by the recycling of absorbing liquid recovery system, be converted into absorbent and be able to reuse.Wherein, two compartment bipolar membrane electrodialysis devices 3 may be used for the NaHSO in the absorbing liquid of discharge
3and Na
2sO
3be separated into NaOH and H
2sO
3.Two compartment bipolar membrane electrodialysis devices 3 also may be used for the NaHSO in the absorbing liquid of discharge
3be separated into NaOH and Na
2sO
3mixture and H
2sO
3.Desorber 4 may be used for the H discharged by two compartment bipolar membrane electrodialysis devices 3
2sO
3with SO
2formal solution suction go out, and to discharge containing Na simultaneously
2sO
4material.Three compartment bipolar membrane electrodialysis devices 5 may be used for desorber 4 to discharge containing Na
2sO
4material electrolytic separation be NaOH and H
2sO
4.The outlet of the NaOH of two compartment bipolar membrane electrodialysis device 3 electrolytic separation can be connected with the absorbent entrance on absorption tower 1 with the outlet of NaOH of three compartment bipolar membrane electrodialysis device 5 electrolytic separation, the NaOH of electrolytic separation recovery to be used for the desulfurization process in absorption tower 1 as absorbent.
Preferably, with reference to figure 1 and Fig. 2, described two compartment bipolar membrane electrodialysis devices 3 have at least one group of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode 101 and the first anode 105, first negative electrode 101 and two adjacent compartment bipolar membrane electrodialysis films between be also provided with the first pole film 130, the first anode 105 and two adjacent compartment bipolar membrane electrodialysis films between be also provided with the second pole film 131, described two compartment bipolar membrane electrodialysis films are to comprising the first Bipolar Membrane 102, first cation-exchange membrane 103 and the second Bipolar Membrane 104, the first alkali room 31 is formed between first Bipolar Membrane 102 and the first cation-exchange membrane 103, the first salt room 32 is formed between second Bipolar Membrane 104 and the first cation-exchange membrane 103.
Wherein, the first salt chamber inlet 107 can export with the absorbing liquid on absorption tower 1 and be connected.The absorbing liquid of discharging on absorption tower 1 can be imported through the first salt chamber inlet 107.When electric dialyzator starts, water can be imported through the first alkali chamber inlet 108.Under the effect of the electric field formed at the first negative electrode 101 and the first anode 105, OH in the first alkali room 31
-ion enrichment, H in the first salt room 32
+ion enrichment, the Na in the first salt room 32
+ion enters the first alkali room 31 and and OH
-ion forms the NaOH aqueous solution, and the NaOH aqueous solution of formation is derived through the first alkali room outlet 109.First alkali room outlet 109 can be connected with the absorbent entrance on absorption tower 1.The NaOH aqueous solution that first alkali room outlet 109 is derived can be used for the desulfurization process in absorption tower 1 as absorbent.HSO in first salt room 32
3 -and SO
3 2-with H
+ion forms H
2sO
3, with Na
2sO
4together, discharged by the first salt room outlet 106.First salt room outlet 106 can be connected with the stripping liquid entrance of desorber 4.That is discharged by the first salt room outlet 106 contains H
2sO
3and Na
2sO
4material obtain desorb at desorber 4, release SO
2.Desorber 4 have gas vent and liquid outlet.The SO discharged after desorb
2discharge through gas vent.The SO discharged
2may be used for preparing sulphur.The SO of release
2the liquid outlet of rear remaining material on desorber 4 is discharged.Release SO
2rear remaining material main component is Na
2sO
4the aqueous solution.
Preferably, described two compartment bipolar membrane electrodialysis devices 3 have the many groups of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode 101 and the first anode 105; And adjacent two group of two compartment bipolar membrane electrodialysis film centering, right the second Bipolar Membrane of last group of two compartment bipolar membrane electrodialysis film is as right the first Bipolar Membrane of rear one group of two compartment bipolar membrane electrodialysis film.Such as, two bipolar membrane electrodialysis films pair as shown in Figure 2, bipolar membrane electrodialysis film on the left of Fig. 2 is to comprising the first Bipolar Membrane 102, first cation-exchange membrane 103 and the second Bipolar Membrane 104, formed between first Bipolar Membrane 102 and the first cation-exchange membrane 103 between first alkali room 31, second Bipolar Membrane 104 and the first cation-exchange membrane 103 and form the first salt room 32; Bipolar membrane electrodialysis film on the right side of Fig. 2 is to comprising the second Bipolar Membrane 104, cation-exchange membrane 113 and Bipolar Membrane 114, form another the first alkali room 31 between second Bipolar Membrane 104 and cation-exchange membrane 113, between Bipolar Membrane 114 and cation-exchange membrane 113, form another the first salt room 32.
Wherein, room, pole can be formed between the first negative electrode 101 and the first pole film 130, between the first anode 105 and the second pole film 131, also can form room, pole.Pole liquid can be contained in room, pole.Pole liquid is used for conduction.Such as pole liquid can for containing Na
2sO
4the aqueous solution (concentration can be 2-3 about % by weight).Wherein, the first pole film 130 and two compartment bipolar membrane electrodialysis films between (such as between the first pole film 130 and the first Bipolar Membrane 102) another the first salt room 32 can be formed.Wherein, the second pole film 131 and two compartment bipolar membrane electrodialysis films between (such as between the second pole film 131 and Bipolar Membrane 114) another one first alkali room 31 can be formed.
Preferably, with reference to figure 3 and Fig. 4, described two compartment bipolar membrane electrodialysis devices (3) have at least one group of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode (101) and the first anode (105), first negative electrode (101) and two compartment bipolar membrane electrodialysis films between be also provided with the first pole film (130), the first anode (105) and two compartment bipolar membrane electrodialysis films between be also provided with the second pole film (131), described two compartment bipolar membrane electrodialysis films are to comprising the first Bipolar Membrane (102), first anion-exchange membrane (140) and the second Bipolar Membrane (104), the second salt room 33 is formed between first Bipolar Membrane (102) and the first anion-exchange membrane (140), the first sour room 34 is formed between second Bipolar Membrane (104) and the first anion-exchange membrane (140).
Wherein, the second salt chamber inlet 138 can export with the absorbing liquid on absorption tower 1 and be connected.The absorbing liquid of discharging on absorption tower 1 can be imported through the second salt chamber inlet 138.Second salt room 33 is provided with at least one second saline solution outlet, the second saline solution outlet can be the second salt room outlet 139.When electrodialysis starts, Na can be imported through the first sour chamber inlet 137
2sO
4the aqueous solution, also can import water through the first sour chamber inlet 137.Under the effect of the electric field formed at the first negative electrode 101 and the first anode 105, OH in the second salt room 33
-ion enrichment, H in the first sour room 34
+, HSO
3 -and SO
3 2-ion enrichment, the NaHSO in the second salt room 33
3and OH
-ion forms Na
2sO
3the aqueous solution, the Na of formation
2sO
3the aqueous solution and NaOH solution export 139 through the second salt room to be derived.Second salt room outlet 139 can be connected with the absorbent entrance on absorption tower 1.What the second salt room outlet 139 was derived contains Na
2sO
3the desulfurization process in absorption tower 1 can be back to the aqueous solution of NaOH.HSO in first sour room 34
3 -and SO
3 2-with H
+ion forms H
2sO
3, with Na
2sO
4together, discharged by the first sour room outlet 136.First sour room outlet 136 can be connected with the stripping liquid entrance of desorber 4.That is discharged by the first sour room outlet 136 contains H
2sO
3material obtain desorb at desorber 4, release SO
2.Desorber 4 have gas vent and liquid outlet.The SO discharged after desorb
2discharge through gas vent.The SO discharged
2may be used for preparing sulphur.The SO of release
2the liquid outlet of rear remaining material on desorber 4 is discharged.The SO of release
2rear remaining material main component is for containing Na
2sO
4and H
2sO
4the aqueous solution.
Preferably, described two compartment bipolar membrane electrodialysis devices 3 have the many groups of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode 101 and the first anode 105; And adjacent two group of two compartment bipolar membrane electrodialysis film centering, right the second Bipolar Membrane of last group of two compartment bipolar membrane electrodialysis film is as right the first Bipolar Membrane of rear one group of two compartment bipolar membrane electrodialysis film.Such as, two bipolar membrane electrodialysis films pair as shown in Figure 4, bipolar membrane electrodialysis film on the left of Fig. 4 is to comprising the first Bipolar Membrane 102, first anion-exchange membrane 140 and the second Bipolar Membrane 104, formed between first Bipolar Membrane 102 and the first anion-exchange membrane 140 between second salt room 33, second Bipolar Membrane 104 and the first anion-exchange membrane 140 and form the first sour room 34; Bipolar membrane electrodialysis film on the right side of Fig. 4 is to comprising the second Bipolar Membrane 104, anion-exchange membrane 141 and Bipolar Membrane 114, form another the second salt room 33 between second Bipolar Membrane 104 and anion-exchange membrane 141, between Bipolar Membrane 114 and anion-exchange membrane 141, form another the first sour room 34.
Wherein, room, pole can be formed between the first negative electrode 101 and the first pole film 130, between the first anode 105 and the second pole film 131, also can form room, pole.Containing pole liquid in room, pole.The effect of polar region provides direct current to bipolar membrane electrodialysis device exactly.Such as pole liquid can for containing Na
2sO
4the aqueous solution.Wherein, the first pole film 130 and two compartment bipolar membrane electrodialysis films between (such as between the first pole film 130 and the first Bipolar Membrane 102) another the first sour room 34 can be formed.Wherein, the second pole film 131 and two compartment bipolar membrane electrodialysis films between (such as between the second pole film 131 and Bipolar Membrane 114) another one second salt room 33 can be formed.
Preferably, with reference to figure 5, described three compartment bipolar membrane electrodialysis devices 5 have at least one group of three compartment bipolar membrane electrodialysis films pair arranged between the second negative electrode 201 and second plate 206, second negative electrode 201 and three compartment bipolar membrane electrodialysis films between be also provided with the 3rd pole film 230, second plate 206 and three compartment bipolar membrane electrodialysis films between be also provided with the 4th pole film 231, described three compartment bipolar membrane electrodialysis films are to comprising the 3rd Bipolar Membrane 202, second cation-exchange membrane 203, second anion-exchange membrane 204 and the 4th Bipolar Membrane 205, the second alkali room 53 is formed between 3rd Bipolar Membrane and the second cation-exchange membrane 203, the 3rd salt room 52 is formed between second cation-exchange membrane 203 and the second anion-exchange membrane 204, the second sour room 51 is formed between second anion-exchange membrane 204 and the 4th Bipolar Membrane 205.
Wherein, the 3rd salt chamber inlet 210 can be connected with the liquid outlet of desorber 4.The main component importing desorber 4 discharge through the 3rd salt chamber inlet 210 is Na
2sO
4the material of the aqueous solution.When electric dialyzator starts, water can be imported through the second alkali chamber inlet 212 and the second sour chamber inlet 211.Under the effect of the electric field formed at the second negative electrode 201 and second plate 206, OH in the second alkali room 53
-ion enrichment, H in the second sour room 51
+ion enrichment, the Na in the 3rd salt room 52
+ion enters the second alkali room 53 and and OH
-ion forms the NaOH aqueous solution, and the NaOH aqueous solution of formation is derived through the second alkali room outlet 207.Second alkali room outlet 207 can be connected with the absorbent entrance on absorption tower 1.The NaOH aqueous solution that second alkali room outlet 207 is derived can be used for the desulfurization process in absorption tower 1 as absorbent.SO in 3rd salt room 52
4 2-enter the second sour room 51 and and H
+ion forms H
2sO
4, discharged by the second sour room outlet 208.3rd salt room 52 has the second salt room outlet 209, can be used for discharging the remaining Na reaching pollution emission standard of electrodialysis
2sO
4the aqueous solution.
Preferably, described three compartment bipolar membrane electrodialysis devices 5 have the many groups of three compartment bipolar membrane electrodialysis films pair be arranged between the second negative electrode 201 and second plate 206; And adjacent two group of three compartment bipolar membrane electrodialysis film centering, right the 4th Bipolar Membrane of last group of three compartment bipolar membrane electrodialysis film is as right the 3rd Bipolar Membrane of rear one group of three compartment bipolar membrane electrodialysis film.Such as, two bipolar membrane electrodialysis films pair as shown in Figure 5, bipolar membrane electrodialysis film on the left of Fig. 5 is to comprising the 3rd Bipolar Membrane 202, second cation-exchange membrane 203, second anion-exchange membrane 204 and the 4th Bipolar Membrane 205, the second alkali room 53 is formed between 3rd Bipolar Membrane and the second cation-exchange membrane 203, formed between second cation-exchange membrane 203 and anion-exchange membrane 204 between the 3rd salt room 52, second anion-exchange membrane 204 and the 4th Bipolar Membrane 205 and form the second sour room 51; Bipolar membrane electrodialysis film on the right side of Fig. 5 is to comprising the 4th Bipolar Membrane 205, cation-exchange membrane 223, anion-exchange membrane 224 and Bipolar Membrane 225, the second alkali room 53 is formed between 4th Bipolar Membrane 205 and cation-exchange membrane 223, form the 3rd salt room 52 between cation-exchange membrane 223 and anion-exchange membrane 224, between anion-exchange membrane 224 and Bipolar Membrane 225, form the second sour room 51.
Preferably, described second alkali room 53 is provided with at least one second alkali lye outlet; Described second sour room 51 is provided with at least one second acid solution outlet; Described second alkali lye outlet is connected with the absorbent entrance on absorption tower 1.As shown in Figure 5, the second alkali lye outlet can be the second alkali room outlet 207, second acid solution outlet can be the second sour room outlet 208.
Wherein, between the second negative electrode 201 and the 3rd pole film 230, room, pole can be formed, between second plate 206 and the 4th pole film 231, also can form room, pole.Pole liquid can be contained in room, pole.Such as pole liquid can contain Na
2sO
4the aqueous solution.Wherein, the 3rd pole film 230 and three compartment bipolar membrane electrodialysis films between (such as between the 3rd pole film 230 and the 3rd Bipolar Membrane 202) another the second sour room 51 can be formed.Wherein, the 4th pole film 231 and three compartment bipolar membrane electrodialysis films between (such as between the 4th pole film 231 and Bipolar Membrane 225) another one second alkali room 53 can be formed.
Preferably, the absorbing liquid on described absorption tower 1 exports and be also connected with absorbing liquid circulating pump 6 between the entrance of described absorbing liquid recovery system.The absorbing liquid that absorption tower 1 can be discharged by absorbing liquid circulating pump 6 absorbs liquid pump to absorption tower 1 and/or absorbing liquid recovery system.
Preferably, solid-liquid separator 2 is also connected with between the entrance of described absorbing liquid circulating pump 6 and described absorbing liquid recovery system, the absorbing liquid outlet on described absorption tower 1 is connected with the entrance of absorbing liquid circulating pump 6, and the outlet of described absorbing liquid circulating pump 6 is connected with the entrance of described solid-liquid separator 2 with the absorbing liquid entrance on described absorption tower 1; The purified liquor outlet of described solid-liquid separator 2 is connected with the entrance of described absorbing liquid recovery system with the absorbing liquid entrance on described absorption tower 1.Described solid-liquid separator 2 may be used for the solid constituent in separate absorbent liquid.Wherein, described solid-liquid separator 2 can be settling vessel and/or filter.
Preferably, the exhanst gas outlet on described absorption tower 1 is also provided with filter 7 and/or liquid drop separator 8.Described filter 7 may be used for the dust removed in the flue gas of absorption tower 1 discharge.Described liquid drop separator 8 may be used for removing the drop carried secretly in the flue gas of absorption tower 1 discharge.
Below preferred embodiment of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. a flue gas desulfur device, this flue gas desulfur device comprises: absorption tower (1) and the absorbing liquid recovery system be connected between the absorbing liquid outlet on absorption tower (1) and absorbent entrance, is characterized in that: described absorbing liquid recovery system comprises at least one two compartment bipolar membrane electrodialysis device (3) and/or at least one three compartment bipolar membrane electrodialysis device (5).
2. flue gas desulfur device according to claim 1, is characterized in that: described absorbing liquid recovery system comprises at least one the two compartment bipolar membrane electrodialysis device (3), at least one desorber (4) and at least one the three compartment bipolar membrane electrodialysis device (5) that connect successively along absorbing liquid flow direction.
3. flue gas desulfur device according to claim 1 and 2, it is characterized in that: described two compartment bipolar membrane electrodialysis devices (3) have at least one group of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode (101) and the first anode (105), first negative electrode (101) and two adjacent compartment bipolar membrane electrodialysis films between be also provided with the first pole film (130), the first anode (105) and two adjacent compartment bipolar membrane electrodialysis films between be also provided with the second pole film (131), described two compartment bipolar membrane electrodialysis films are to comprising the first Bipolar Membrane (102), first cation-exchange membrane (103) and the second Bipolar Membrane (104), the first alkali room (31) is formed between first Bipolar Membrane (102) and the first cation-exchange membrane (103), the first salt room (32) is formed between second Bipolar Membrane (104) and the first cation-exchange membrane (103).
4. flue gas desulfur device according to claim 3, is characterized in that: described first alkali room (31) is provided with at least one first alkali lye outlet; Described first alkali lye outlet is connected with the absorbent entrance of absorption tower (1).
5. flue gas desulfur device according to claim 1 and 2, it is characterized in that: described two compartment bipolar membrane electrodialysis devices (3) have at least one group of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode (101) and the first anode (105), first negative electrode (101) and two adjacent compartment bipolar membrane electrodialysis films between be also provided with the first pole film (130), the first anode (105) and two adjacent compartment bipolar membrane electrodialysis films between be also provided with the second pole film (131), described two compartment bipolar membrane electrodialysis films are to comprising the first Bipolar Membrane (102), first anion-exchange membrane (140) and the second Bipolar Membrane (104), the second salt room (33) is formed between first Bipolar Membrane (102) and the first anion-exchange membrane (140), the first sour room (34) is formed between second Bipolar Membrane (104) and the first anion-exchange membrane (140).
6. flue gas desulfur device according to claim 5, is characterized in that: described second salt room (33) is provided with at least one second saline solution outlet; Described second saline solution outlet is connected with the absorbent entrance of absorption tower (1).
7. flue gas desulfur device according to claim 3, is characterized in that: described two compartment bipolar membrane electrodialysis devices (3) have the many groups of two compartment bipolar membrane electrodialysis films pair be arranged between the first negative electrode (101) and the first anode (105); And adjacent two group of two compartment bipolar membrane electrodialysis film centering, right the second Bipolar Membrane of last group of two compartment bipolar membrane electrodialysis film is as right the first Bipolar Membrane of rear one group of two compartment bipolar membrane electrodialysis film.
8. flue gas desulfur device according to claim 1 and 2, it is characterized in that: described three compartment bipolar membrane electrodialysis devices (5) have at least one group of three compartment bipolar membrane electrodialysis films pair be arranged between the second negative electrode (201) and second plate (206), second negative electrode (201) and three adjacent compartment bipolar membrane electrodialysis films between be also provided with the 3rd pole film (230), second plate (206) and three adjacent compartment bipolar membrane electrodialysis films between be also provided with the 4th pole film (231), described three compartment bipolar membrane electrodialysis films are to comprising the 3rd Bipolar Membrane (202), second cation-exchange membrane (203), second anion-exchange membrane (204) and the 4th Bipolar Membrane (205), the second alkali room (53) is formed between 3rd Bipolar Membrane and the second cation-exchange membrane (203), the 3rd salt room (52) is formed between second cation-exchange membrane (203) and anion-exchange membrane (204), the second sour room (51) is formed between second anion-exchange membrane (204) and the 4th Bipolar Membrane (205).
9. flue gas desulfur device according to claim 8, is characterized in that: described three compartment bipolar membrane electrodialysis devices (5) have the many groups of three compartment bipolar membrane electrodialysis films pair be arranged between the second negative electrode (201) and second plate (206); And adjacent two group of three compartment bipolar membrane electrodialysis film centering, right the 4th Bipolar Membrane of last group of three compartment bipolar membrane electrodialysis film is as right the 3rd Bipolar Membrane of rear one group of three compartment bipolar membrane electrodialysis film.
10. flue gas desulfur device according to claim 8, is characterized in that: described second alkali room (53) is provided with at least one second alkali lye outlet; Described second sour room (51) is provided with at least one second acid solution outlet; Described second alkali lye outlet is connected with the absorbent entrance of absorption tower (1).
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| CN201420532793.7U CN204093290U (en) | 2014-09-16 | 2014-09-16 | A kind of flue gas desulfur device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833698A (en) * | 2015-01-15 | 2016-08-10 | 北京中天元环境工程有限责任公司 | Method for production of concentrated sulfuric acid from sulfur-containing flue gas |
| CN107892281A (en) * | 2017-10-31 | 2018-04-10 | 浙江海洋大学 | A kind of system and method for reclaiming sulphur relieving haperacidity |
| CN109954394A (en) * | 2017-12-26 | 2019-07-02 | 株式会社东芝 | Sour component removing device and method for removing acid component and sour gas removing device |
| CN113350977A (en) * | 2021-06-11 | 2021-09-07 | 清华大学 | Coupling membrane separation device for absorbing and separating acid gas from mixed gas |
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2014
- 2014-09-16 CN CN201420532793.7U patent/CN204093290U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833698A (en) * | 2015-01-15 | 2016-08-10 | 北京中天元环境工程有限责任公司 | Method for production of concentrated sulfuric acid from sulfur-containing flue gas |
| CN105833698B (en) * | 2015-01-15 | 2018-05-25 | 湖南中天元环境工程有限公司 | A kind of method using the sulfur-containing smoke gas production concentrated sulfuric acid |
| CN107892281A (en) * | 2017-10-31 | 2018-04-10 | 浙江海洋大学 | A kind of system and method for reclaiming sulphur relieving haperacidity |
| CN107892281B (en) * | 2017-10-31 | 2020-11-13 | 浙江海洋大学 | System and method for recovering sulfuric acid |
| CN109954394A (en) * | 2017-12-26 | 2019-07-02 | 株式会社东芝 | Sour component removing device and method for removing acid component and sour gas removing device |
| CN113350977A (en) * | 2021-06-11 | 2021-09-07 | 清华大学 | Coupling membrane separation device for absorbing and separating acid gas from mixed gas |
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