CN108910921A - A kind of system and method preparing magnesium sulfate using flue gas heat-source Cycles - Google Patents
A kind of system and method preparing magnesium sulfate using flue gas heat-source Cycles Download PDFInfo
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- CN108910921A CN108910921A CN201810886208.6A CN201810886208A CN108910921A CN 108910921 A CN108910921 A CN 108910921A CN 201810886208 A CN201810886208 A CN 201810886208A CN 108910921 A CN108910921 A CN 108910921A
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- China
- Prior art keywords
- flue gas
- magnesium sulfate
- adlerika
- heating device
- heat exchanger
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- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 title claims abstract description 106
- 239000003546 flue gas Substances 0.000 title claims abstract description 85
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 229910052943 magnesium sulfate Inorganic materials 0.000 title claims abstract description 53
- 235000019341 magnesium sulphate Nutrition 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 84
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 41
- 230000023556 desulfurization Effects 0.000 claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000003125 aqueous solvent Substances 0.000 claims description 11
- 239000000779 smoke Substances 0.000 claims description 6
- 238000002207 thermal evaporation Methods 0.000 claims description 6
- 239000003517 fume Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 1
- 239000006227 byproduct Substances 0.000 abstract description 5
- 238000002425 crystallisation Methods 0.000 abstract description 4
- 230000008025 crystallization Effects 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 32
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 26
- 239000011777 magnesium Substances 0.000 description 26
- 229910052749 magnesium Inorganic materials 0.000 description 26
- 230000008569 process Effects 0.000 description 22
- 239000000047 product Substances 0.000 description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 239000005864 Sulphur Substances 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- ZGBSOTLWHZQNLH-UHFFFAOYSA-N [Mg].S(O)(O)(=O)=O Chemical compound [Mg].S(O)(O)(=O)=O ZGBSOTLWHZQNLH-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- KJPJKTCATSVXHG-UHFFFAOYSA-N [dihydroxy(oxo)-$l^{6}-sulfanylidene]magnesium Chemical compound OS(O)(=O)=[Mg] KJPJKTCATSVXHG-UHFFFAOYSA-N 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/40—Magnesium sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of system and methods that magnesium sulfate is prepared using flue gas heat-source Cycles, belong to flue gas desulfurization technique field.The system comprises：Desulfurizing tower, heating device, deduster, heat exchanger, slurry pool, sparge pipe；The deduster is connect with heating device, the lower part connection of heating device and desulfurizing tower；The bottom of the desulfurizing tower is connect with heat exchanger, and heat exchanger is connect with heating device；The heating device is connect with heat exchanger, and heat exchanger, slurry pool, sparge pipe are sequentially connected, and the top of desulfurizing tower is protruded into one end of sparge pipe.The present invention using with the subsequent evaporation crystallization treatment technique by the way of flue gas heat exchange instead of Adlerika, not only simplify the preparation process of desulfuration byproduct, the energy consumption in evaporative crystallization processing is saved, and realizes the effective use of residual heat resources, flue gas is made to have obtained high value added utilization.
Description
Technical field
The present invention relates to flue gas desulfurization technique field more particularly to a kind of fume afterheats using thermal power plant, in magnesium
Circulation prepares the system and method for magnesium sulfate in method sweetening process.
Background technique
Magnesium method flue gas desulphurization technique is a kind of Wet Flue Gas Desulfurization Technique for carrying out flue gas desulfurization as desulfurizing agent using magnesia,
The desulphurization mechanism of magnesia is that basic anhydride and water react and generates hydroxide, and hydroxide slurry reabsorbs in flue gas
SO2, generate aqueous magnesium sulfite and a small amount of magnesium sulfate.The direct by-product of magnesium method flue gas desulphurization is three water and six water sulfurous acid
Magnesium, since there are oxygen (O in flue gas2), magnesium sulfite will be oxidized to magnesium sulfate under certain condition.
Magnesium processes desulfurization technology maturation is reliable, and desulfuration efficiency is high, and byproduct can comprehensively utilize, it is shown that increasing is excellent
More property.There is data to show, at present the U.S., Europe, Japanese Thermal Power Plants 80% unit capacity be all made of magnesium processes desulfurization, TaiWan, China
95% unit capacity of power plant is also using magnesium processes desulfurization.Magnesium processes desulfurization has following features：(1) magnesium that magnesium method flue gas desulphurization uses
Agent desulfurizing agent is very stronger than reactivity, and much higher than the reactivity of calcium agent 10 times, desirable higher desulfuration efficiency generally exists
95% or more, the consuming cost of desulfurizing agent reduces.(2) while desulfuration operations are stablized, small investment, due to magnesium processes desulfurization by-product
Object cigarette magnesium sulfate, magnesium sulfate have higher solubility, so as to avoid its in systems fouling, blocking the problems such as generation.
However, in existing magnesium method flue gas desulphurization technique, it generally first will be in flue gas with desulfurizing agent (such as magnesium hydroxide solution)
Sulfur dioxide removal, obtain being post-processed to obtain sulfuric acid magnesium products after Adlerika to it again, what this method generated
Problem is：Aqueous solvent in desulfurizing agent largely evaporates in desulfurizing tower, and aqueous solvent not only causes water resource after being discharged with flue gas
A large amount of wastes will cause serious plume contamination after being expelled directly out, so that enterprise has to and since smoke moisture is excessive
It is additional to install flue gas dehumidification equipment additional, make entire process complications, the high cost of flue gas desulfurization.Therefore, it is necessary to study one kind
New magnesium processes desulphurization system, to solve above-mentioned problems of the prior art.
Summary of the invention
For above-mentioned problems of the prior art, the present invention is intended to provide a kind of prepare sulphur using flue gas heat-source Cycles
The system and method for sour magnesium.The present invention realizes following for magnesium processes desulfurization using heat source abundant in magnesium processes desulfurization technology and flue gas
While ring carries out and the low cost of magnesium sulfate, high efficiency preparation, the high value added utilization of flue gas is also achieved.
An object of the present invention is to provide a kind of system for preparing magnesium sulfate using flue gas heat-source Cycles.
The second object of the present invention is to provide a kind of method for preparing magnesium sulfate using flue gas heat-source Cycles.
The third object of the present invention is to provide a kind of magnesium sulfate prepared using flue gas heat-source Cycles.
The fourth object of the present invention, which is to provide, to be prepared the system of magnesium sulfate, method using flue gas heat-source Cycles and utilizes cigarette
The application of the magnesium sulfate of gas heat-source Cycles preparation.
For achieving the above object, specifically, the invention discloses following technical proposals：
Firstly, the invention discloses a kind of system for preparing magnesium sulfate using flue gas heat-source Cycles, the system comprises：It is de-
Sulphur tower, Adlerika pump, heating device, air-introduced machine, deduster, heat exchanger, slurry pool, desulfurizing agent solution pump, sparge pipe.
The deduster, air-introduced machine, heating device are sequentially connected, and heating device is connected with the lower part of desulfurizing tower.Flue gas warp
After crossing deduster dedusting, it is sent into heating device by air-introduced machine, is exchanged heat with Adlerika therein, the flue gas after heat exchange
Temperature is greatly lowered, and then enters from the lower part of desulfurizing tower and carries out desulfurization in desulfurizing tower.
The flue gas comes from thermal power plant, because thermal power plant possesses DEG C various temperature gradients from 100 DEG C to 800
Heat source, residual heat resources are abundant, can cooperate with magnesium processes desulfurization, realize the high value added utilization of flue gas.
The slurry pool and desulfurizing agent solution pump connect, and one end of sparge pipe and desulfurizing agent solution pump connect, and the other end is stretched
Enter the top of desulfurizing tower.Contain desulfurizing agent solution in the slurry pool, desulfurizing agent solution is sent into sparge pipe by desulfurizing agent solution pump
In, then sprayed from up to down from the top of desulfurizing tower by sparge pipe, and the flue gas after exchanging heat is sailed against the current from the lower part of desulfurizing tower,
It is contacted with desulfurizing agent solution, to complete the desulfurization of flue gas, the flue gas after desulfurization is directly by smoke stack emission, and desulfurizing agent solution passes through
Become congregate of the Adlerika to desulfurizing tower after crossing desulfurization.
The bottom of the desulfurizing tower, Adlerika pump, heat exchanger, heating device are sequentially connected；The sulphur of desulfurization tower bottom
Sour magnesium solution is admitted in heat exchanger by Adlerika pump, is exchanged heat with water vapour therein, thus molten to magnesium sulfate
Liquid preheating, the Adlerika after preheating enters heating device, molten to magnesium sulfate using the flue gas (heat source) by heating device
Liquid is heated, and the aqueous solvent in Adlerika is by thermal evaporation, thus the magnesium sulfate finished product crystallized.
Preferably, the heat exchanger uses dividing wall type structure, and the inside of the dividing wall type structure is hollow structure, vapor
Pass through from hollow dividing wall type structure, for Adlerika between dividing wall type structure, the wall by dividing wall type structure is complete
It is exchanged at the heat between vapor and Adlerika, and then Adlerika is preheated.
Preferably, the sour magnesium finished product also recyclable Adlerika import to heating device of heating device preparation, changes
The kind magnesium sulfate concentration into heating device, further increases magnesium sulfate quality and heat recovery.
The heating device, heat exchanger, slurry pool are sequentially connected.Shape of the aqueous solvent after by thermal evaporation in Adlerika
At water vapour enter heat exchanger from heating device, to be preheated to Adlerika, after preheating, water recovery at
Then condensed water is reintroduced in slurry pool, be configured to desulfurizing agent solution with desulfurizing agent and recycled.
Preferably, the heating device uses dividing wall type structure, and the inside of the dividing wall type structure is hollow structure, flue gas
Pass through from hollow dividing wall type structure, for Adlerika between dividing wall type structure, the wall by dividing wall type structure is complete
It is exchanged at the heat between flue gas and Adlerika, and then Adlerika is dehydrated, using fume afterheat to sulfuric acid
Magnesium solution, which is dehydrated, to be advantageous in that：The waste heat in flue gas can not only be efficiently used, and desulfurizing tower can be lowered into
Flue-gas temperature further decrease discharge to reduce the evaporation capacity of moisture in desulfurizing tower (desulfurizing agent solution, Adlerika)
The water capacity of flue gas reduces plume contamination.
Secondly, including the following steps the invention also discloses a kind of method for preparing magnesium sulfate using flue gas heat-source Cycles：
(1) first flue gas is sent into heating device after deduster dedusting by air-introduced machine, is then fed into desulfurizing tower and carries out
Desulfurization；Meanwhile the desulfurizing agent solution in slurry pool is sent into sparge pipe by desulfurizing agent solution pump, is sprayed from up to down through sparge pipe
Afterwards, and from the upstream smoke contacts of desulfurization tower bottom, desulfurization is completed, and desulfurizing agent solution is transformed into Adlerika to de-
Collect the bottom of sulphur tower；
(2) Adlerika in step (1) is sent into heat exchanger by Adlerika pump preheats, and send again after preheating
Enter in heating device, Adlerika is heated with fume afterheat, the aqueous solvent in Adlerika is formed by thermal evaporation
Water vapour obtains magnesium sulfate finished product；
(3) water vapour in step (2) enters in heat exchanger, preheats to the Adlerika in desulfurizing tower,
After preheating then water recovery is reintroduced in slurry pool at condensed water, is configured to desulfurizing agent solution with desulfurizing agent and is carried out
It recycles.
Finally, the invention also discloses prepare the system of magnesium sulfate using flue gas heat-source Cycles, utilize flue gas heat-source Cycles
The magnesium sulfate of the method, flue gas heat-source Cycles magnesium processes desulfurization preparation that prepare magnesium sulfate is in food, chemical industry, medicine, agriculture field
Application.
It should be noted that：The main object of the present invention is while realizing prepared by magnesium sulfate using waste heat in flue gas, also
Realize the circulation of magnesium processes sulfur removal technology, it means that have to realize the Adlerika obtained after desulfurizing agent solution and desulfurization
Otherwise the recycling of middle aqueous solution can not really realize circulation magnesium processes desulfurization this purpose；It is found after analysis：Desulfurizing agent is molten
The loss of aqueous solvent is concentrated mainly on the sweetening process in desulfurizing tower in liquid and Adlerika, because the smoke temperature of flue gas is very
Height is directly entered after contacting in desulfurizing tower with the Adlerika obtained after desulfurizing agent solution and desulfurization, aqueous solution therein
It can largely be evaporated, and then be discharged with flue gas, both wasted the residual heat resources in flue gas, wasted a large amount of water resource, and
And the water capacity that flue gas is discharged is too big, can generate obviously plume phenomenon in discharge, bring serious visual pollution.
To solve the above-mentioned problems, the present invention just significantly cools down to it first before flue gas enters desulfurizing tower,
The waste heat of flue gas is used to heat desulfurization product (magnesium sulfate solution) to prepare magnesium sulfate, to eliminate Adlerika
Subsequent processing directly obtains magnesium sulfate finished product, after the flue gas after cooling enters desulfurizing tower, evaporates the ability of aqueous solvent significantly
It reduces, the evaporation of aqueous solvent in desulfurizing tower can be effectively reduced, not only reduce the waste of water resource, also reduce discharge flue gas
Water capacity, effectively improve pollution caused by flue gas, simultaneously as discharge flue gas water capacity sharp fall, Ke Yizhi
Run in sky, is not required to carry out subsequent processing again to avoid plume phenomenon.And magnesium sulfate solution is entering after heat exchanger preheats
Just there is certain temperature before heating device, into after heating device, the solute water in Adlerika is in steam source
Heating under can fast and efficiently evaporate, magnesium sulfate finished product is directly obtained, to eliminate the subsequent place of Adlerika
Reason, and the water-soluble matter in Adlerika is introduced back into slurry pool after being evaporated, exchanging heat and is recycled, to realize
The recycling of water resource avoids the waste of water resource；As can be seen that the waste heat and letter of the invention just in flue gas
Single circulation, cooling, heat transfer process efficiently solve a large amount of waves of fume afterheat resource and water resource in magnesium processes sweetening process
The problem taken achieves extraordinary synergy.
Compared with prior art, the beneficial effect that the present invention obtains is：
(1) present invention using with the subsequent evaporation crystallization treatment technique by the way of flue gas heat exchange instead of Adlerika,
The preparation process for not only simplifying desulfuration byproduct saves the energy consumption in evaporative crystallization processing, and realizes residual heat resources
Effective use, so that flue gas has been obtained high value added utilization.
(2) heat in water vapour of the present invention such as can be used for heating after being exchanged heat the purposes, make waste heat in flue gas again
It is utilized, meanwhile, condensed water vapour is used again to desulfurization, not only realizes circulation magnesium processes desulfurization, is also effectively improved
Plume phenomenon, by system of the invention, treated after flue gas directly empties, and plume phenomenon naked eyes are invisible.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the structural schematic diagram for preparing magnesium sulfate system in the embodiment of the present invention 1 using flue gas heat-source Cycles.
Fig. 2 is the structural schematic diagram for preparing magnesium sulfate system in the embodiment of the present invention 2 using flue gas heat-source Cycles.
Attached drawing acceptance of the bid note respectively represents：1- desulfurizing tower, 2- Adlerika pump, 3- heating device, 4- air-introduced machine, 5- dedusting
Device, 6- heat exchanger, 7- slurry pool, 8- desulfurizing agent solution pump, 9- sparge pipe.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, existing magnesium processes sulfur removal technology still has a large amount of wastes, serious of water resource
Plume contamination and complex process, it is at high cost the problems such as, therefore, the invention proposes it is a kind of using flue gas heat-source Cycles prepare
The system and method for magnesium sulfate, the present invention is described further with reference to the accompanying drawings and detailed description.
Embodiment 1
As shown in Figure 1, a kind of system for preparing magnesium sulfate using flue gas heat-source Cycles, the system comprises：Desulfurizing tower 1,
Adlerika pump 2, heating device 3, air-introduced machine 4, deduster 5, heat exchanger 6, slurry pool 7, desulfurizing agent solution pump 8, sparge pipe
9。
The deduster 5, air-introduced machine 4, heating device 3 are sequentially connected, and heating device 3 is connected with the lower part of desulfurizing tower 1.Cigarette
Gas is sent into heating device 3 by air-introduced machine, is exchanged heat with Adlerika therein, after heat exchange after deduster dedusting
Flue-gas temperature reduce, then enter from the lower part of desulfurizing tower 1 and carry out desulfurization in desulfurizing tower 1.
The slurry pool 7 is connect with desulfurizing agent solution pump 8, and one end of sparge pipe 9 is connect with desulfurizing agent solution pump 8, another
The top of desulfurizing tower 1 is protruded at end.Contain desulfurizing agent solution in the slurry pool 7, desulfurizing agent solution is sent by desulfurizing agent solution pump
In sparge pipe 9, then sprayed from up to down from the top of desulfurizing tower by sparge pipe 9, and the flue gas after exchanging heat is from the lower part of desulfurizing tower 1
It sails against the current, is contacted with desulfurizing agent solution, to complete the desulfurization of flue gas, the flue gas after desulfurization takes off directly by smoke stack emission
Sulphur agent solution becomes Adlerika to the congregate of desulfurizing tower 1 after desulfurization.
The bottom of the desulfurizing tower 1, Adlerika pump 2, heat exchanger 6, heating device 3 are sequentially connected；1 bottom of desulfurizing tower
Adlerika 2 be admitted in heat exchanger 6 by Adlerika pump, exchange heat with water vapour therein, thus to sulphur
Sour magnesium solution preheating, the Adlerika after preheating enters heating device 3, right using the flue gas (heat source) for passing through heating device 3
Adlerika is heated, and the aqueous solvent in Adlerika is by thermal evaporation, thus the magnesium sulfate finished product crystallized.
The heating device 3, heat exchanger 6, slurry pool 7 are sequentially connected.Aqueous solvent in Adlerika is after by thermal evaporation
The water vapour of formation enter heat exchanger 6 from heating device 3, to be preheated to Adlerika, after preheating, water vapour
Condensed water is condensed, is then reintroduced in slurry pool 7, is configured to desulfurizing agent solution with desulfurizing agent and is recycled.
The heating device 3 uses dividing wall type structure, and the inside of the dividing wall type structure is hollow structure, and flue gas is from hollow
Dividing wall type structure in pass through, Adlerika completes flue gas between dividing wall type structure, through the wall of dividing wall type structure
Heat between Adlerika exchanges.
The heat exchanger 6 uses dividing wall type structure, and the inside of the dividing wall type structure is hollow structure, and vapor is from hollow
Dividing wall type structure in pass through, Adlerika is completed water by the wall of dividing wall type structure and is steamed between dividing wall type structure
Heat between gas and Adlerika exchanges, and then preheats to Adlerika.
Embodiment 2
As shown in Fig. 2, a kind of flue gas heat-source Cycles magnesium processes desulfurization and magnesium sulfate preparation system, the system with embodiment 1,
20% magnesium sulfate finished product of heating device preparation is recycled to the Adlerika import of heating device 3, to improve granulation matter
Amount and heat recovery.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for those skilled in the art
For member, various changes and changes are possible in this application.Within the spirit and principles of this application, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of system for preparing magnesium sulfate using flue gas heat-source Cycles, it is characterised in that：The system comprises：Desulfurizing tower adds
Thermal, deduster, heat exchanger, slurry pool, sparge pipe；The deduster is connect with heating device, heating device and desulfurizing tower
Lower part connection；The bottom of the desulfurizing tower is connect with heat exchanger, and heat exchanger is connect with heating device；The heating device with change
Hot device connection, heat exchanger, slurry pool, sparge pipe are sequentially connected, and the top of desulfurizing tower is protruded into one end of sparge pipe.
2. the system for preparing magnesium sulfate using flue gas heat-source Cycles as described in claim 1, it is characterised in that：The system is also
Including air-introduced machine, the deduster, air-introduced machine, heating device are sequentially connected.
3. the system for preparing magnesium sulfate using flue gas heat-source Cycles as claimed in claim 2, it is characterised in that：The system is also
It is pumped including Adlerika, the bottom of the desulfurizing tower, Adlerika pump, heat exchanger are sequentially connected.
4. the system for preparing magnesium sulfate using flue gas heat-source Cycles as claimed in claim 3, it is characterised in that：The system is also
It is pumped including desulfurizing agent solution；The heat exchanger, slurry pool, desulfurizing agent solution pump are sequentially connected, one end of sparge pipe and desulfurizing agent
Solution pump connection, the other end protrude into the top of desulfurizing tower.
5. the system according to any one of claims 1-4 for preparing magnesium sulfate using flue gas heat-source Cycles, it is characterised in that：Institute
Heating device is stated using dividing wall type structure, the inside of the dividing wall type structure is hollow structure, and flue gas is from hollow dividing wall type knot
Pass through in structure, Adlerika completes flue gas by the wall of dividing wall type structure and magnesium sulfate is molten between dividing wall type structure
Heat exchange between liquid.
6. the system according to any one of claims 1-4 for preparing magnesium sulfate using flue gas heat-source Cycles, it is characterised in that：Institute
Heat exchanger is stated using dividing wall type structure, the inside of the dividing wall type structure is hollow structure, and vapor is from hollow dividing wall type knot
Pass through in structure, Adlerika completes vapor and magnesium sulfate between dividing wall type structure, through the wall of dividing wall type structure
Heat exchange between solution.
7. the system according to any one of claims 1-4 for preparing magnesium sulfate using flue gas heat-source Cycles, it is characterised in that：Institute
State the Adlerika import that magnesium sulfate finished product obtained in heating device is recycled to heating device.
8. a kind of method for preparing magnesium sulfate using flue gas heat-source Cycles, it is characterised in that：Include the following steps：
(1) first flue gas is sent into heating device after deduster dedusting by air-introduced machine, is then fed into desulfurizing tower and carries out desulfurization；
Meanwhile desulfurizing agent solution pump by slurry pool desulfurizing agent solution be sent into sparge pipe, after sparge pipe sprays from up to down, with from
The upstream smoke contacts of desulfurization tower bottom complete desulfurization, and desulfurizing agent solution is transformed into Adlerika to desulfurizing tower
Collect bottom；
(2) Adlerika in step (1) is sent into heat exchanger by Adlerika pump preheats, and is re-fed into and adds after preheating
In thermal, Adlerika is heated with fume afterheat, the aqueous solvent in Adlerika is formed water and steamed by thermal evaporation
Vapour obtains magnesium sulfate finished product；
(3) water vapour in step (2) enters in heat exchanger, preheats to the Adlerika in desulfurizing tower, preheating
Afterwards then water recovery is reintroduced in slurry pool at condensed water, is configured to desulfurizing agent solution with desulfurizing agent and is recycled
It utilizes.
9. the magnesium sulfate of method according to claim 8 preparation.
10. using flue gas heat-source Cycles preparing the system of magnesium sulfate and/or as right is wanted as claim 1-7 is described in any item
The application of method described in asking 8 and/or magnesium sulfate as claimed in claim 9 in food, chemical industry, medicine, agriculture field.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810886208.6A CN108910921A (en) | 2018-08-06 | 2018-08-06 | A kind of system and method preparing magnesium sulfate using flue gas heat-source Cycles |
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| CN201810886208.6A CN108910921A (en) | 2018-08-06 | 2018-08-06 | A kind of system and method preparing magnesium sulfate using flue gas heat-source Cycles |
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Application publication date: 20181130 |