CN101053760A - Sintering flue gas ammonia method desulfurizing system - Google Patents
Sintering flue gas ammonia method desulfurizing system Download PDFInfo
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- CN101053760A CN101053760A CN 200710051547 CN200710051547A CN101053760A CN 101053760 A CN101053760 A CN 101053760A CN 200710051547 CN200710051547 CN 200710051547 CN 200710051547 A CN200710051547 A CN 200710051547A CN 101053760 A CN101053760 A CN 101053760A
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Abstract
The invention relates to an ammonia desulfurization system for sintering flue gas, and the system comprises a gasifying equipment, a absorbing equipment, an oxidation equipment, a concentration equipment and filter equipment etc. The ammonia desulfurization system for sintering flue gas of the invention can removes the SO2 in the flue gas effectively, but also can desulfurizate by reacting with SO2 in the flue gas using carbonization waste water (liquid ammonia gasified). The product of ammonium sulfite is oxidated in a low concentration at the common pressure, and then is concentrated by evaporation by the quantity of heat of the flue gas to greatly save the heat dissipation of concentration by evaporation to arrive at the aim of economize on energy. The ammonia sulfate solution in high concentration is filtrated, and then is send to the ammiaonia sulfate plant to produce chemical fertilizer. The flue gas desulfurization system of the invention has a reasonable process, makes the discharge of the flue gas reach the standard, forms without secondary pollution, treatment the waste gas by waste carbonization waste water, and produces the byproduct-chemical fertilizer.
Description
Technical field
The present invention relates to flue gas desulfurization technique, particularly a kind of sintering flue gas ammonia method desulfurizing system.
Background technology
Along with the construction in city and the raising of people's living standard, the consumption of the energy constantly increases.Because China mainly is to be the energy big country of source material with the coal, the sulfur dioxide that causes entering in the atmosphere increases sharply from 2,549 ten thousand tons of 1,995 ten thousand tons to 2005 in 2000.
In the ammonia type flue gas desulfurizing at present commonly used: the oxidation of ammonium sulfite is carried out in desulfurizing tower usually, and the result of oxidation reduces the valid density of ammonia, is unfavorable for that the removal of sulfur dioxide in flue gas and oxidation efficiency are low; Concentration systems prior art to ammonium sulfate adopts steam that ammonium sulfate is carried out evaporation and concentration, and steam consumption is big, the operating cost height; Escape problem to ammonia in the desulfurizing tower does not still have a kind of effectively solution so far.In the ammonia process of desulfurization, the quality of sulphur ammonium quality directly influences the sale of product, contains the part dust in the sinter fume, can influence the color and luster of sulphur ammonium.
Summary of the invention
At above-mentioned existing problems, the object of the present invention is to provide a kind of sintering flue gas ammonia method desulfurizing system, the present invention is achieved by the following technical solutions.
Its technical solution is: sintering flue gas ammonia method desulfurizing system, desulphurization system by gasification, absorption, oxidation, concentrate, equipment such as filtration forms.Equipment for gasification comprises: unload ammonia pump, ammonia tank, liquefied ammonia gasifier and ammonia air accumulator; Absorption equipment comprises: desulfurizing tower, blender, circulating pump; Oxidation furnaces comprises: oxidation trough, oxidation fan; Concentrator comprises: circular buffering jar, concentrated circulating pump, lime-ash coarse filter; Filter plant comprises: ammonium sulfate surge tank, ammonium sulfate solution delivery pump, lime-ash fine filter.Unload between ammonia pump, ammonia tank, liquefied ammonia gasifier and the ammonia air accumulator and be connected in series by pipeline.Ammonia air accumulator outlet in the equipment for gasification connects the blender on the circulating line in the absorption equipment by pipeline, ammonia enters the effect of blender by blender makes ammonia fully mix, be evenly distributed with circulation fluid, reduce the high possibility of local ammonia concentration, avoid the escape of ammonia.The outlet of blender connects spraying layer in the desulfurizing tower by pipeline, and the blender import is connected to outlet of circulating pump, and the inlet of circulating pump is connected to the desulfurizing tower kerve by pipeline.Establish branch pipe(tube) to oxidation trough at the circulating-pump outlet pipeline, be provided with cooling coil in the oxidation trough, cooling coil can be regulated the oxidizing temperature of ammonium sulfite; The aeration airduct connects oxidation fan by pipeline, for the oxidation of ammonium sulfite provides oxidation air, also be provided with agitator in the oxidation trough, agitator is used for the minute bubbles of broken aeration wind tube outlet, the contact area of oxygen and ammonium sulfite in the raising air, the oxygenation efficiency of raising ammonium sulfite.Oxidation trough is connected to the circular buffering jar by pipeline, the circular buffering jar is connected to concentrated pump entry by pipeline, concentrate outlet of circulating pump is connected to desulfurizing tower by pipeline spraying cooling layer, utilize the heat of flue gas to carry out evaporation and concentration to well-oxygenated ammonium sulfate, desulfurizing tower spraying cooling layer is provided with liquid outlet, liquid outlet is connected to the circular buffering jar by pipeline, be connected on the pipeline that layer falls in spray connecting branch to the import of lime-ash coarse filter concentrating circulating pump, the lime-ash coarse filter act as the concentration of keeping impurity in the circular buffering jar, make the unlikely rising of impurity concentration in the circular buffering jar, ensure the color and luster of product ammonium sulfate.The purified liquor outlet of lime-ash coarse filter is connected to ammonium sulfate surge tank and circular buffering jar respectively by pipeline, the refluxing opening of lime-ash coarse filter is connected to the circular buffering jar by pipeline, the outlet of ammonium sulfate surge tank is connected to the inlet of ammonium sulfate solution delivery pump by pipeline, ammonium sulfate solution carries delivery side of pump to be connected to the inlet of lime-ash fine filter by pipeline, the lime-ash fine filter act as the impurity of removing in the ammonium sulfate solution, make the color and luster of product ammonium sulfate better.The purified liquor outlet of lime-ash fine filter is connected to the sulphur ammonium by pipeline and prepares the workshop, and the refluxing opening of lime-ash fine filter is connected to the circular buffering jar by pipeline.
Owing to adopted above technical scheme, sintering flue gas ammonia method desulfurizing system of the present invention, can not only effectively remove sulfur in smoke, can utilize simultaneously coking chemical waste water (liquefied ammonia is through gasification) to carry out reaction desulfuration with sulfur in smoke, the product sulfurous acid ammonia that is generated carries out the low concentration atmospheric pressure oxidation, the ammonium sulfate of the heat that utilizes flue gas again after to oxidation carries out evaporation and concentration, saved the heat consumption of evaporation and concentration greatly, reaches purpose of energy saving.Solution after the evaporation and concentration filtered obtain the higher ammonium sulfate of purity, deliver to sulphur ammonium workshop inhibition and generation fertilizer.Flue gas desulphurization system flow process of the present invention rationally, make the flue gas qualified discharge, non-secondary pollution also utilizes the coking chemical waste water treatment of wastes with processes of wastes against one another, can also produce accessory substance---chemical fertilizer.
Description of drawings
Accompanying drawing is the schematic diagram of desulphurization system of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
See accompanying drawing
Liquefied ammonia is transported to the desulfurization scene by the sealing tank car, by unloading ammonia pump 1 liquefied ammonia is delivered to ammonia tank 2 storages.3 heating make the liquefied ammonia gasification and deliver to ammonia air accumulator 4 through the liquefied ammonia gasifier, and the ammonia in the ammonia air accumulator 4 is connected to blender 5 by pipeline and uses ammonia for desulfurizing tower 6.The deposed ammonia that sintering plant can utilize in the sintering process to be produced joins reaction in desulfurizing tower 6 and the oxidation trough 10 as desulfurizing agent.Desulfurizing tower 6 is the syllogic desulfurizing tower, the desulfurizing tower 6 outer circulating pumps 9 that are provided with, circulating pump 9 is delivered to spraying layer 7 with the circulation fluid of desulfurizing tower 6 kerves, spraying layer 7 is provided with atomizer, circulation fluid is atomized, because gravity effect decline fully contacts with the rising sulfur in smoke, reach the effect of removing sulfur dioxide, one section grid of design in the tower, liquid sprays from cat head, relies on gravity to act on grid surface and becomes membranaceous dirty, flue gas contacts with liquid film in the process that rises, remove the sulfur dioxide in the partial fume, grid also plays uniform flue gas effect simultaneously, strengthens the desulfurized effect of desulfurizing tower 6.The effect of circulating pump 9 is in order to improve the utilization rate of desulfurizing agent, constantly to utilize circulation fluid that flue gas is washed.By the outlet conduit arm of circulating pump 9, discharge the bottom of the mixed solution of bisulfite ammonia continuously to oxidation trough 10, the outlet conduit of ammonia air accumulator 4 connects arm to oxidation trough 10, and the purpose that adds ammonia is to be ammonium sulfite with the bisulfite ammonia react.Oxidation fan 13 feeds excess air in oxidation trough 10, aeration airduct 14 by oxidation trough 10 bottoms makes even distribution of air enter oxidation trough 10, oxidation trough 10 is provided with agitator 11 simultaneously, if agitator 11 purposes are air bubbles that fragmentation enters oxidation trough 10, bubble is further reduced, increase the contact area of air with the solution contact, improving the sulfurous acid ammoxidation is the oxygenation efficiency of sulfate of ammoniac.In order to reach the temperature conditions that comparatively ideal sulfite oxidation is an ammonium sulfate, cooling coil 12 is set in the oxidation trough 10, cooling coil 12 external cooling waters enter the flow of the cooling medium of cooling coil 12 by adjusting, realize the automatic adjusting of temperature.Ammonium sulfate after oxidation trough 10 oxidations is delivered to circular buffering jar 15 by overflow or pump, the ammonium sulfate concentration of autoxidation groove 10 outlets is low, ammonium sulfate is delivered to desulfurizing tower 6 smoke inlet spraying cooling sections 8 by concentrating circulating pump 16, utilize the heat of flue gas that the low-concentration sulfuric acid ammonium salt solution is evaporated, concentrate, solution behind smoke evaporative is back to circular buffering jar 15, so constantly circulation, evaporation and concentration, simultaneously, because a certain amount of dust is brought in the washing of flue gas into, keep the unlikely rising of dust concentration in the circular buffering jar 15 in the circulation solution by lime-ash coarse filter 17 other filter forms.After circulating solution concentration arrived certain value, the control valve of the purified liquor outlet of opening lime-ash coarse filter 17 to ammonium sulfate surge tank 18 pipelines ensured the ammonium sulfate concentrations that enters sulphur ammonium workshop.The control valve of the purified liquor outlet that turns down lime-ash coarse filter 17 simultaneously to circular buffering jar 15 pipelines.High-concentration sulfuric acid ammonia solution after lime-ash coarse filter 17 is removed large granular impurity enters ammonium sulfate storage tank 18 and temporarily stores, make the sulphur ammonium fertilizer through the preparation workshop that ammonium sulfate solution delivery pump 19 provides the clean ammonium sulfate of power after the minute impurities that lime-ash fine filter 20 is removed in the solution to deliver to the sulphur ammonium, lime-ash fine filter 20 refluxing opening solution are recycled to circular buffering jar 15.
The operation principle of desulphurization system of the present invention is:
The native system desulfurizing agent adopts liquefied ammonia, with joining in the desulfurizing tower circulation fluid after its gasification, the sulfur oxide in the flue gas is fully contacted with circulation fluid, and the key reaction equation is:
SO
2+H
2O+NH
3＝(NH
4)HSO
3 (1)
SO
2+H
2O+2NH
3＝(NH
4)
2SO
3 (2)
(NH
4)
2SO
3+H
2O+SO
2＝NH
4HSO
3 (3)
Excessive N H
4HSO
3Can reduce desulfuration efficiency, so need to discharge excessive N H
4HSO
3To oxidation trough, in oxidation trough, add an amount of ammonia, following reaction equation is arranged:
NH
4HSO
3+NH
3＝(NH
4)
2SO
3 (4)
2(NH
4)
2SO
3+O
2＝2(NH
4)
2SO
4 (5)
Ammonium sulfate after the oxidation enters the circular buffering tank stores, concentrates, sends into sulphur ammonium workshop behind the dust removal and filtration and carry out the making of chemical fertilizer through smoke evaporative.
Claims (3)
1. sintering flue gas ammonia method desulfurizing system, it is characterized in that: unload ammonia pump (1), ammonia tank (2), be connected in series by pipeline between liquefied ammonia gasifier (3) and the ammonia air accumulator (4), the outlet of ammonia air accumulator (4) connects the import of blender (5) on the circulating line by pipeline, the outlet of blender (5) connects spraying layer (7) in the desulfurizing tower (6) by pipeline, the import of blender (5) is connected to the outlet of circulating pump (9) by pipeline, the inlet of circulating pump (9) is connected to the kerve of desulfurizing tower (6) by pipeline, on the outlet conduit of circulating pump (9), establish branch pipe(tube) to oxidation trough (10), the outlet of oxidation trough (10) is connected to circular buffering jar (15) by pipeline, the outlet of circular buffering jar (15) is connected to the inlet of concentrated circulating pump (16) by pipeline, the outlet that concentrates circulating pump (16) is connected to the spraying cooling layer (8) of desulfurizing tower (6) by pipeline, the spraying cooling layer (8) of desulfurizing tower (6) is provided with liquid outlet, liquid outlet is connected to circular buffering jar (15) by pipeline, be connected on the pipeline that layer (8) falls in spray connecting branch to the import of lime-ash coarse filter (17) concentrating circulating pump (16), the purified liquor outlet of lime-ash coarse filter (17) is connected to ammonium sulfate surge tank (18) and circular buffering jar (15) respectively by pipeline, refluxing opening on the lime-ash coarse filter (17) is connected to circular buffering jar (15) by pipeline, ammonium sulfate surge tank (18) is connected to the inlet of ammonium sulfate solution delivery pump (19) again by pipeline, the outlet of ammonium sulfate solution delivery pump (19) is connected to the inlet of lime-ash fine filter (20) by pipeline, the purified liquor outlet of lime-ash fine filter (20) is connected to the sulphur ammonium by pipeline and prepares the workshop, and the refluxing opening on the lime-ash fine filter (20) is connected to circular buffering jar (15) by pipeline.
2.. the sintering flue gas ammonia method desulfurizing system described in claim 1 is characterized in that: be provided with cooling coil (12) and aeration airduct (14) in the oxidation trough (10), aeration airduct (14) connects the outlet of oxidation fan (13) by pipeline.
3. the sintering flue gas ammonia method desulfurizing system described in claim 1 is characterized in that: be provided with agitator (11) in the oxidation trough (10).
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| CNB2007100515474A CN100490946C (en) | 2007-02-13 | 2007-02-13 | Sintering flue gas ammonia method desulfurizing system |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898081A (en) * | 2010-08-04 | 2010-12-01 | 山西新唐工程设计有限公司 | Method for desulphurizing sulfur-containing flue gas with coking crude gas water-washing deaminized ammonia water |
| CN102068897A (en) * | 2011-01-11 | 2011-05-25 | 中环（中国）工程有限公司 | Ammonia supply device for ammonia method desulfuration process |
| CN102363099A (en) * | 2011-06-28 | 2012-02-29 | 顾忠华 | Low temperature SCR denitration device for marine exhaust emission processing system |
| CN102363098A (en) * | 2011-06-28 | 2012-02-29 | 顾忠华 | Ammonia flue gas mixing apparatus used in stern exhaust gas processing system |
| CN102363100A (en) * | 2011-06-28 | 2012-02-29 | 顾忠华 | Ammonia gas and flue gas mixing device for tail gas processing system for ship |
| CN101837235B (en) * | 2009-03-19 | 2012-08-29 | 北京九州美电科技有限公司 | Low-consumption high-efficiency boiler flue gas desulfurization process |
| CN101927118B (en) * | 2009-06-25 | 2012-09-05 | 山东省冶金设计院股份有限公司 | Reproducible desulfuration process special for sintering machine and starting method of process system |
| CN101927119B (en) * | 2009-06-25 | 2012-10-03 | 山东省冶金设计院股份有限公司 | Reproducible desulfuration process special for sintering machine and starting method of process system |
| CN101829494B (en) * | 2009-03-11 | 2012-10-31 | 上海立谊环保工程技术有限公司 | Dry ash wetting and recycling technology for desulfurizing sintered fume by rotary spraying and drying method |
| CN103480162A (en) * | 2013-08-12 | 2014-01-01 | 北京博智伟德环保科技有限公司 | Novel energy-saving liquid ammonia evaporation system and control method thereof |
| CN103496717A (en) * | 2013-09-23 | 2014-01-08 | 武汉都市环保工程技术股份有限公司 | Sequencing batch ammonium sulfate solution oxidation and sulfur scum removal method |
| CN103816778A (en) * | 2014-01-27 | 2014-05-28 | 武汉都市环保工程技术股份有限公司 | Synergic removal method for multiphase contaminant in sintering flue gas |
| CN103816779A (en) * | 2014-01-27 | 2014-05-28 | 武汉都市环保工程技术股份有限公司 | Synergic removal system for multiphase contaminant in sintering flue gas |
| CN104147913A (en) * | 2013-09-13 | 2014-11-19 | 上海大学 | Two-phase ammonifying method of wet ammonia desulfurization process |
| CN104437048A (en) * | 2014-11-05 | 2015-03-25 | 华文蔚 | Flue gas desulfurization method of iron and steel furnace |
| CN105016401A (en) * | 2014-04-29 | 2015-11-04 | 宝山钢铁股份有限公司 | System and method for treating phenol-cyanogen concentrated waste water |
| CN106268268A (en) * | 2016-08-26 | 2017-01-04 | 江苏中圣高科技产业有限公司 | A kind of ammonifying more also produces desulfurizer and the method for liquid sulfur dioxide |
| CN109621653A (en) * | 2018-12-29 | 2019-04-16 | 中冶南方都市环保工程技术股份有限公司 | A kind of the coke oven flue gas ammonia method desulfurizing system and method for resourcebility recycling |
| CN109945640A (en) * | 2019-04-17 | 2019-06-28 | 湖南省金润碲业有限公司 | A kind of mobile waste gas collection device when metal molten |
| CN112206641A (en) * | 2020-09-23 | 2021-01-12 | 武汉龙净环保工程有限公司 | Single-tower multistage circulating ammonia/ammonium sulfate method for flue gas desulfurization |
| CN113546510A (en) * | 2020-04-24 | 2021-10-26 | 中国石油天然气集团有限公司 | Tail gas treatment system of sulfur recovery equipment |
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2007
- 2007-02-13 CN CNB2007100515474A patent/CN100490946C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829494B (en) * | 2009-03-11 | 2012-10-31 | 上海立谊环保工程技术有限公司 | Dry ash wetting and recycling technology for desulfurizing sintered fume by rotary spraying and drying method |
| CN101837235B (en) * | 2009-03-19 | 2012-08-29 | 北京九州美电科技有限公司 | Low-consumption high-efficiency boiler flue gas desulfurization process |
| CN101927118B (en) * | 2009-06-25 | 2012-09-05 | 山东省冶金设计院股份有限公司 | Reproducible desulfuration process special for sintering machine and starting method of process system |
| CN101927119B (en) * | 2009-06-25 | 2012-10-03 | 山东省冶金设计院股份有限公司 | Reproducible desulfuration process special for sintering machine and starting method of process system |
| CN101898081A (en) * | 2010-08-04 | 2010-12-01 | 山西新唐工程设计有限公司 | Method for desulphurizing sulfur-containing flue gas with coking crude gas water-washing deaminized ammonia water |
| CN102068897A (en) * | 2011-01-11 | 2011-05-25 | 中环（中国）工程有限公司 | Ammonia supply device for ammonia method desulfuration process |
| CN102363098B (en) * | 2011-06-28 | 2014-03-19 | 顾忠华 | Ammonia flue gas mixing apparatus used in stern exhaust gas processing system |
| CN102363099A (en) * | 2011-06-28 | 2012-02-29 | 顾忠华 | Low temperature SCR denitration device for marine exhaust emission processing system |
| CN102363098A (en) * | 2011-06-28 | 2012-02-29 | 顾忠华 | Ammonia flue gas mixing apparatus used in stern exhaust gas processing system |
| CN102363100A (en) * | 2011-06-28 | 2012-02-29 | 顾忠华 | Ammonia gas and flue gas mixing device for tail gas processing system for ship |
| CN103480162A (en) * | 2013-08-12 | 2014-01-01 | 北京博智伟德环保科技有限公司 | Novel energy-saving liquid ammonia evaporation system and control method thereof |
| CN104147913B (en) * | 2013-09-13 | 2016-04-27 | 上海大学 | A kind of two-phase of wet ammonia process desulfurizing technology adds ammonia process |
| CN104147913A (en) * | 2013-09-13 | 2014-11-19 | 上海大学 | Two-phase ammonifying method of wet ammonia desulfurization process |
| CN103496717B (en) * | 2013-09-23 | 2014-12-17 | 武汉都市环保工程技术股份有限公司 | Sequencing batch ammonium sulfate solution oxidation and sulfur scum removal method |
| CN103496717A (en) * | 2013-09-23 | 2014-01-08 | 武汉都市环保工程技术股份有限公司 | Sequencing batch ammonium sulfate solution oxidation and sulfur scum removal method |
| CN103816778A (en) * | 2014-01-27 | 2014-05-28 | 武汉都市环保工程技术股份有限公司 | Synergic removal method for multiphase contaminant in sintering flue gas |
| CN103816779A (en) * | 2014-01-27 | 2014-05-28 | 武汉都市环保工程技术股份有限公司 | Synergic removal system for multiphase contaminant in sintering flue gas |
| CN105016401A (en) * | 2014-04-29 | 2015-11-04 | 宝山钢铁股份有限公司 | System and method for treating phenol-cyanogen concentrated waste water |
| CN104437048A (en) * | 2014-11-05 | 2015-03-25 | 华文蔚 | Flue gas desulfurization method of iron and steel furnace |
| CN106268268A (en) * | 2016-08-26 | 2017-01-04 | 江苏中圣高科技产业有限公司 | A kind of ammonifying more also produces desulfurizer and the method for liquid sulfur dioxide |
| CN109621653A (en) * | 2018-12-29 | 2019-04-16 | 中冶南方都市环保工程技术股份有限公司 | A kind of the coke oven flue gas ammonia method desulfurizing system and method for resourcebility recycling |
| CN109945640A (en) * | 2019-04-17 | 2019-06-28 | 湖南省金润碲业有限公司 | A kind of mobile waste gas collection device when metal molten |
| CN113546510A (en) * | 2020-04-24 | 2021-10-26 | 中国石油天然气集团有限公司 | Tail gas treatment system of sulfur recovery equipment |
| CN112206641A (en) * | 2020-09-23 | 2021-01-12 | 武汉龙净环保工程有限公司 | Single-tower multistage circulating ammonia/ammonium sulfate method for flue gas desulfurization |
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| CN100490946C (en) | 2009-05-27 |
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