CN108889099A - A kind of circulation magnesium processes desulfurization of steam source and magnesium sulfate preparation system and method - Google Patents
A kind of circulation magnesium processes desulfurization of steam source and magnesium sulfate preparation system and method Download PDFInfo
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- CN108889099A CN108889099A CN201810885612.1A CN201810885612A CN108889099A CN 108889099 A CN108889099 A CN 108889099A CN 201810885612 A CN201810885612 A CN 201810885612A CN 108889099 A CN108889099 A CN 108889099A
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- Prior art keywords
- steam source
- magnesium sulfate
- heat exchanger
- adlerika
- desulfurization
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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 109
- 238000000034 method Methods 0.000 title claims abstract description 76
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 70
- 230000023556 desulfurization Effects 0.000 title claims abstract description 65
- 229910052943 magnesium sulfate Inorganic materials 0.000 title claims abstract description 55
- 235000019341 magnesium sulphate Nutrition 0.000 title claims abstract description 55
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000011777 magnesium Substances 0.000 title claims abstract description 52
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 52
- 230000008569 process Effects 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 73
- 239000003546 flue gas Substances 0.000 claims abstract description 52
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 239000002002 slurry Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 239000003795 chemical substances by application Substances 0.000 claims description 39
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 239000000779 smoke Substances 0.000 claims description 8
- 239000003125 aqueous solvent Substances 0.000 claims description 7
- 239000002918 waste heat Substances 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 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
- 230000001112 coagulating effect Effects 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
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 31
- 239000000047 product Substances 0.000 description 10
- 238000005516 engineering process Methods 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
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- ZGBSOTLWHZQNLH-UHFFFAOYSA-N [Mg].S(O)(O)(=O)=O Chemical compound [Mg].S(O)(O)(=O)=O ZGBSOTLWHZQNLH-UHFFFAOYSA-N 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000002207 thermal evaporation Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 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
- 239000007921 spray 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
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 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
- 238000002156 mixing Methods 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
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
- 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
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/608—Sulfates
-
- 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
-
- 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
-
- 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
- Y02P20/50—Improvements relating to the production of bulk chemicals
Abstract
The present invention relates to a kind of steam source magnesium processes desulfurization and magnesium sulfate circulation preparation system and methods, belong to flue gas desulfurization technique field.The system comprises：Desulfurizing tower；Heat exchanger, deduster, heating device, condenser, slurry pool, condensate system, steam source, sparge pipe；Deduster is connect with heat exchanger, the lower part connection of heat exchanger and desulfurizing tower；The bottom of desulfurizing tower is connect with heat exchanger；Heat exchanger is connect with heating device, and steam source is connected with heating device；Heating device, condenser, slurry pool are sequentially connected, and one end of sparge pipe is connect with slurry pool, and the other end protrudes into the top of desulfurizing tower；After condensate system, condenser, booster pump are sequentially connected, booster pump is connect with condensate system again, to form the circulatory system.Invention not only simplifies the preparation process of desulfuration byproduct, the energy consumption in evaporative crystallization processing is saved, and realizes the effective use of residual heat resources, the flue gas in thermal power plant and steam source is made to obtain 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 and steam using thermal power plant
Waste heat, circulation prepares the system and method for magnesium sulfate in magnesium processes 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 steam source magnesium processes desulfurization and sulfuric acid
Magnesium recycles preparation system and method.The present invention realizes magnesium processes desulfurization using heat source abundant in magnesium processes desulfurization technology and flue gas
Circulation carry out and magnesium sulfate low cost, high efficiency preparation while, also achieve the high value added utilization of flue gas.
An object of the present invention is to provide a kind of circulation magnesium processes desulfurization of steam source and magnesium sulfate preparation system.
The second object of the present invention is to provide a kind of method steam source circulation magnesium processes desulfurization and prepare magnesium sulfate.
The third object of the present invention is to provide a kind of magnesium sulfate of steam source circulation magnesium processes desulfurization preparation.
The fourth object of the present invention is to provide steam source circulation magnesium processes desulfurization and magnesium sulfate preparation system, steam source follow
The desulfurization of ring magnesium processes and the application for preparing the method for magnesium sulfate, magnesium sulfate prepared by steam source circulation magnesium processes desulfurization.
For achieving the above object, specifically, the invention discloses following technical proposals：
Firstly, the invention discloses a kind of circulation magnesium processes desulfurization of steam source and magnesium sulfate preparation system, the system packet
It includes：Desulfurizing tower, magnesium sulfate slurries pump, heat exchanger, air-introduced machine, deduster, heating device, condenser, slurry pool, desulfurizer slurry
Pump, sparge pipe, steam source, booster pump.
The deduster, air-introduced machine, heat exchanger are sequentially connected, and heat exchanger is connected with the lower part of desulfurizing tower.Flue gas is by removing
After dirt device dedusting, it is sent into heat exchanger and is exchanged heat by air-introduced machine, the flue gas after heat exchange enters desulfurizing tower from the lower part of desulfurizing tower
Middle carry out desulfurization.
The heating device, condenser, 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.
Containing desulfurizing agent solution in the slurry pool, desulfurizing agent solution is sent into sparge pipe by desulfurizing agent solution pump, then by
Sparge pipe sprays from up to down from the top of desulfurizing tower, and the flue gas after exchanging heat is sailed against the current from the lower part of desulfurizing tower, with desulfurization
Agent solution contact, to complete the desulfurization of flue gas, the flue gas after desulfurization is directly by smoke stack emission, and desulfurizing agent solution passes through desulfurization
Become congregate of the Adlerika to desulfurizing tower afterwards.
The bottom of the desulfurizing tower, Adlerika pump, heat exchanger are sequentially connected；The Adlerika of desulfurization tower bottom is logical
Persulfuric acid magnesium solution pump is admitted in heat exchanger, and heat exchanger is exchanged heat using the heat in flue gas with Adlerika, with right
Adlerika preheating, to improve the temperature (preheating Adlerika) of Adlerika；Preferably, the portion of heating device preparation
Divide the also recyclable Adlerika import to heating device of magnesium sulfate finished product, further to the heat in magnesium sulfate finished product
It is recycled.
Preferably, the heat exchanger uses dividing wall type structure, and the inside of the dividing wall type structure is hollow structure, steam from
Pass through in hollow dividing wall type structure, Adlerika is completed between dividing wall type structure by the wall of dividing wall type structure
Heat between steam and Adlerika exchanges.
The heat exchanger is connected with heating device, and steam source is connected with heating device.Using fume afterheat to magnesium sulfate
Solution is preheated, and is advantageous in that：The waste heat in flue gas can not only be efficiently used, and the cigarette of desulfurizing tower can be lowered into
Temperature degree further decreases the water capacity of discharge flue gas to reduce the evaporated water of the desulfurizing agent solution in desulfurizing tower, improves
Plume contamination phenomenon.The effect of the heating device is to heat to be preheated rear Adlerika from heat exchanger, makes magnesium sulfate
Solute water in solution is by thermal evaporation, thus the magnesium sulfate finished product crystallized；Heat source of the steam source as heating device.
The steam source comes from thermal power plant, because thermal power plant possesses DEG C various temperature ladders from 100 DEG C to 800
The heat source of degree, residual heat resources are abundant, can cooperate with magnesium processes desulfurization, realize the high added value benefit of steam source and fume afterheat
With.
Preferably, the heating device is heat exchanger.
Preferably, the heating device uses dividing wall type structure, and the inside of the dividing wall type structure is hollow structure, heat source
Steam passes through from hollow dividing wall type structure, and Adlerika passes through the device of dividing wall type structure between dividing wall type structure
The heat that wall is completed between steam source and Adlerika exchanges, and then is heated, is dehydrated to Adlerika.
After the condensate system, condenser, booster pump are sequentially connected, booster pump is connect with condensate system again, thus
Form the circulatory system.
The Adlerika after preheating enters heating device, and the steam in steam source is to heating device
It is heated, makes the solute water in Adlerika by thermal evaporation, thus the magnesium sulfate finished product crystallized；And in steam source
Steam due to heat by Adlerika absorb and condense, form heat source condensed water；Meanwhile the heated steaming in heating device
Solute water after hair forms water vapour, and water vapour enters condenser by the steam outlet in heating device and comes from condensation
Condensed water in water system exchanges heat, and water vapour is cooled after heat exchange forms condensed water and enter slurry pool, with desulphurizer mixing
It is configured to desulfurizing agent solution, is re-used for flue gas desulfurization；And by after steam heating condensed water and heat source condensed water together
It is turned again to by booster pump and carries out recuperation of heat in condensate system.
Secondly, the invention also discloses the method that a kind of circulation magnesium processes desulfurization of steam source prepares magnesium sulfate, including it is as follows
Step：
(1) first flue gas is sent into heat exchanger after deduster dedusting by air-introduced machine, is then sent into from the lower part of desulfurizing tower
Desulfurization is carried out in desulfurizing tower；Meanwhile the desulfurizing agent solution in slurry pool is sent into sparge pipe by desulfurizing agent solution pump, certainly through sparge pipe
After upper sprinkling downwards, with from the upstream smoke contacts of desulfurization tower bottom, desulfurization is completed, and desulfurizing agent solution is transformed into sulfuric acid
Magnesium solution is to the bottom of desulfurizing tower；
(2) Adlerika in step (1) is sent into heat exchanger by Adlerika pump, utilizes the waste heat pair in flue gas
Sulfuric acid U.S. solution preheating in step (1), obtains preheating Adlerika, and preheating Adlerika is then sent into heating device
In, by the heating of steam source, the aqueous solvent preheated in Adlerika is formed by evaporation to water vapour, obtain magnesium sulfate at
Product；
(3) in step (2), the water vapour that aqueous solvent is formed after being evaporated enters in condenser, with come from condensate system
Condensed water exchange heat, after heat exchange water vapour formed condensed water be reintroduced into slurry pool, be configured to take off with desulfurizing agent
The condensed water that sulphur agent solution is recycled, and is heated is by carrying out heat recovery in pressurization pumped back condensate system；
(4) in step (2), the heat source condensed water of the steam formation in steam source.
Finally, the invention also discloses steam source circulation magnesium processes desulfurization and magnesium sulfate preparation systems, steam source circulation
Magnesium processes desulfurization and prepare the method for magnesium sulfate, steam source circulation magnesium processes desulfurization preparation magnesium sulfate food, chemical industry, medicine,
Application in agriculture field.
It should be noted that：The main object of the present invention is using waste heat in flue gas and thermal power plant steam as heat source
While realizing magnesium sulfate preparation, the circulation of magnesium processes sulfur removal technology is also realized, it means that have to realize desulfurizing agent solution
Otherwise recycling with aqueous solution in the Adlerika that obtains after desulfurization can not really realize following for magnesium processes sulfur removal technology
Ring this purpose；It is found after analysis：The loss of aqueous solvent is concentrated mainly on the sweetening process in desulfurizing tower in Adlerika, because
It is very high for the smoke temperature of flue gas, it is directly entered in desulfurizing tower and is contacted with the Adlerika obtained after desulfurizing agent solution and desulfurization
Afterwards, aqueous solution therein 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 the water capacity that flue gas is discharged is too big, can generate obviously plume phenomenon in discharge, brings tight
The visual pollution of weight.
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 preheat desulfurization product (magnesium sulfate solution), after the flue gas after cooling enters in desulfurizing tower, evaporation
The ability of aqueous solution is greatly lowered, and can effectively reduce the evaporation of aqueous solution in desulfurizing tower, not only reduces the wave of water resource
Take, also reduce the water capacity of discharge flue gas, effectively improve pollution caused by flue gas, simultaneously as containing for discharge flue gas is wet
Sharp fall is measured, can directly empty, be not required to carry out subsequent processing again to avoid plume phenomenon；By the preheating of flue gas, sulphur
Sour magnesium solution has just had certain temperature before entering heating device, molten in Adlerika into after heating device
Matter water can fast and efficiently evaporate under the heating of steam source, directly obtain magnesium sulfate finished product, to eliminate magnesium sulfate
The subsequent processing of solution can save the use of steam simultaneously as Adlerika has already been through smoke pre-heating；And by
It is introduced back into slurry pool and is recycled after the water-soluble matter of evaporation and condensed water heat exchange, to realize the repetition of water resource
It utilizes, avoids the waste of water resource；As can be seen that the present invention is just with waste heat, the steam source and simple in flue gas
Circulation, cooling, heat transfer process efficiently solve a large amount of wastes of fume afterheat resource and water resource in magnesium processes sweetening process
Problem, achieve extraordinary synergy.
Compared with prior art, the beneficial effect that the present invention obtains is：
(1) present invention with smoke pre-heating, steam source by the way of exchanging heat instead of the subsequent evaporation of Adlerika
Crystallization treatment technique not only simplifies the preparation process of desulfuration byproduct, saves the energy consumption in evaporative crystallization processing, Er Qieshi
The effective use for having showed residual heat resources makes flue gas and steam source obtain high value added utilization.
(2) present invention is utilized the waste heat in flue gas again, meanwhile, condensed water vapour is used again to take off
Sulphur not only realizes circulation magnesium processes desulfurization, also effectively improves plume phenomenon, and by system of the invention, treated that flue gas is straight
Run in after sky, 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 that steam source recycles magnesium processes desulfurization and magnesium sulfate preparation system in the embodiment of the present invention 1.
Fig. 2 is the structural schematic diagram that steam source recycles magnesium processes desulfurization and magnesium sulfate preparation system in the embodiment of the present invention 2.
Attached drawing acceptance of the bid note respectively represents：1- desulfurizing tower, 2- magnesium sulfate slurries pump, 3- heat exchanger, 4- air-introduced machine, 5- dedusting
Device, 6- heating device, 7- condenser, 8- slurry pool, 9- desulfurizer slurry pump, 10- sparge pipe, 11- steam source, 12- pressurization
Pump.
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 a kind of steam source magnesium processes desulfurization and sulphur
Sour magnesium circulation preparation system and method, 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 steam source circulation magnesium processes desulfurization and magnesium sulfate preparation system, the system comprises：Desulfurization
Tower 1；Magnesium sulfate slurries pump 2, heat exchanger 3, air-introduced machine 4, deduster 5, heating device 6, condenser 7, slurry pool 8, desulfurizing agent slurry
Liquid pump 9, sparge pipe 10, steam source 11, booster pump 12.
The deduster 5, air-introduced machine 4, heat exchanger 3 are sequentially connected, and heat exchanger 3 is connected with the lower part of desulfurizing tower 1.
The heating device 6, condenser 7, slurry pool 8, desulfurizing agent solution pump 9 are sequentially connected, one end of sparge pipe 10 with
9 connection of desulfurizing agent solution pump, the other end protrude into the top of desulfurizing tower 1.
Containing desulfurizing agent solution in the slurry pool 8, desulfurizing agent solution is sent into sparge pipe by desulfurizing agent solution pump, then by
Sparge pipe sprays from up to down from the top of desulfurizing tower, and the flue gas after exchanging heat is sailed against the current from the lower part of desulfurizing tower, with desulfurization
Agent solution contact, to complete the desulfurization of flue gas, the flue gas after desulfurization is directly by smoke stack emission, and desulfurizing agent solution passes through desulfurization
Become congregate of the Adlerika to desulfurizing tower afterwards.
The bottom of the desulfurizing tower 1, Adlerika pump 2, heat exchanger 3 are sequentially connected；The magnesium sulfate of 1 bottom of desulfurizing tower is molten
Liquid is admitted in heat exchanger 3 by Adlerika pump, and heat exchanger 3 is changed using the heat in flue gas with Adlerika
Heat, to be preheated to Adlerika, to improve the temperature (preheating Adlerika) of Adlerika.
The heat exchanger uses dividing wall type structure, and the inside of the dividing wall type structure is hollow structure, and steam is from hollow
Pass through in dividing wall type structure, Adlerika between dividing wall type structure, by the wall of dividing wall type structure complete steam with
Heat exchange between Adlerika, and then Adlerika is dehydrated.
The heat exchanger 3 is connected with heating device 6, and steam source 11 and heating device 6 connect.The work of the heating device
With being to heat to be preheated rear Adlerika from heat exchanger 3, make the solute water in Adlerika by thermal evaporation, thus
To the magnesium sulfate finished product of crystallization；Heat source of the steam source 11 as heating device 6.
The heating device 6 is heat exchanger, and heating device 6 uses dividing wall type structure, the inside of the dividing wall type structure
For hollow structure, heat source stream passes through from hollow dividing wall type structure, and Adlerika passes through between dividing wall type structure
The heat that the wall of dividing wall type structure is completed between steam source and Adlerika exchanges, and then adds to Adlerika
Heat, dehydration.
After the condensate system, condenser 7, booster pump 12 are sequentially connected, booster pump 12 is connect with condensate system again,
To form the circulatory system；Steam outlet in the heat exchanger 3 is connect with condenser 7.
Embodiment 2
As shown in Fig. 2, a kind of circulation magnesium processes desulfurization of steam source and magnesium sulfate preparation system, the system with embodiment 1,
20% magnesium sulfate finished product of heat exchanger preparation is recycled to the Adlerika import of heat exchanger 3, with improve be granulated quality 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 steam source circulation magnesium processes desulfurization and magnesium sulfate preparation system, it is characterised in that：Desulfurizing tower；Heat exchanger, dedusting
Device, heating device, condenser, slurry pool, condensate system, steam source, sparge pipe；The deduster is connect with heat exchanger,
The connection of the lower part of heat exchanger and desulfurizing tower；The bottom of the desulfurizing tower is connect with heat exchanger；The heat exchanger and heating device connect
It connects, the steam source is connected with heating device；The heating device, condenser, slurry pool are sequentially connected, one end of sparge pipe
It is connect with slurry pool, the other end protrudes into the top of desulfurizing tower；After the condensate system, condenser, booster pump are sequentially connected, increase
Press pump is connect with condensate system again, to form the circulatory system.
2. steam source circulation magnesium processes desulfurization as described in claim 1 and magnesium sulfate preparation system, it is characterised in that：The system
System further includes air-introduced machine, and the deduster, air-introduced machine, heat exchanger are sequentially connected；
Or, the bottom of the desulfurizing tower, Adlerika pump, heat exchanger successively connect the system also includes Adlerika pump
It connects.
3. steam source circulation magnesium processes desulfurization as claimed in claim 2 and magnesium sulfate preparation system, it is characterised in that：The system
System further includes desulfurizing agent solution pump；The condenser, slurry pool, desulfurizing agent solution pump are sequentially connected, one end of sparge pipe and de-
The pump connection of sulphur agent solution, the other end protrude into the top of desulfurizing tower；
Or, the system also includes booster pump, after the condensate system, condenser, booster pump are sequentially connected, booster pump again with
Condensate system connection, to form the circulatory system.
4. steam source circulation magnesium processes desulfurization as claimed in claim 3 and magnesium sulfate preparation system, it is characterised in that：The system
System further includes external heating system, and the external heating system is connect with heating device.
5. steam source circulation magnesium processes desulfurization as claimed in claim 4 and magnesium sulfate preparation system, it is characterised in that：It is described to change
Hot device uses dividing wall type structure, and the inside of the dividing wall type structure is hollow structure, and flue gas leads to from hollow dividing wall type structure
It crosses, Adlerika is completed between flue gas and Adlerika between dividing wall type structure by the wall of dividing wall type structure
Heat exchange.
6. steam source circulation magnesium processes desulfurization as described in any one in claim 1-5 and magnesium sulfate preparation system, feature exist
In：The heating device is heat exchanger；Preferably, the heating device use dividing wall type structure, the dividing wall type structure it is interior
Portion is hollow structure, and the steam that steam source provides passes through from hollow dividing wall type structure, and Adlerika is located at dividing wall type
Between structure, the heat between steam source and Adlerika is completed by the wall of dividing wall type structure and is exchanged.
7. steam source circulation magnesium processes desulfurization as claimed in claim 6 and magnesium sulfate preparation system, it is characterised in that：It is described to change
Magnesium sulfate finished product obtained in hot device is recycled to the Adlerika import of heat exchanger；
Or, the steam source is steam in thermal power plant.
8. a kind of method that the magnesium processes desulfurization of steam source circulation prepares magnesium sulfate, it is characterised in that：Include the following steps：
(1) first flue gas is sent into heat exchanger after deduster dedusting by air-introduced machine, is then sent into desulfurization from the lower part of desulfurizing tower
Desulfurization is carried out in tower；Meanwhile desulfurizing agent solution pump by slurry pool desulfurizing agent solution be sent into sparge pipe, through sparge pipe on to
After lower sprinkling, and desulfurization from the upstream smoke contacts of desulfurization tower bottom, is completed, and to be transformed into magnesium sulfate molten for desulfurizing agent solution
Liquid is to the bottom of desulfurizing tower；
(2) Adlerika in step (1) is sent into heat exchanger by Adlerika pump, using the waste heat in flue gas to step
(1) the sulfuric acid U.S. solution preheating in, obtains preheating Adlerika, and then preheating Adlerika is sent into heating device,
By the heating of steam source, the aqueous solvent preheated in Adlerika is formed by evaporation to water vapour, obtains magnesium sulfate finished product；
(3) in step (2), the water vapour that aqueous solvent is formed after being evaporated enters in condenser, with coagulating from condensate system
It bears water and exchanges heat, the condensed water that water vapour is formed after heat exchange is reintroduced into slurry pool, is configured to desulfurizing agent with desulfurizing agent
Solution is recycled, and the condensed water being heated is by carrying out heat recovery in pressurization pumped back condensate system；
(4) in step (2), the heat source condensed water of the steam formation in steam source.
9. the magnesium sulfate of method according to claim 8 preparation.
10. such as the described in any item steam source circulation magnesium processes desulfurization of claim 1-7 and magnesium sulfate preparation system and/or as weighed
Benefit require 8 described in method and/or magnesium sulfate as claimed in claim 9 answering in food, chemical industry, medicine, agriculture field
With.
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