CN1631782A - Method for extracting ammonia sulfate from resultant of flue gas desulfurization by ammonia method - Google Patents
Method for extracting ammonia sulfate from resultant of flue gas desulfurization by ammonia method Download PDFInfo
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- CN1631782A CN1631782A CN 200410098848 CN200410098848A CN1631782A CN 1631782 A CN1631782 A CN 1631782A CN 200410098848 CN200410098848 CN 200410098848 CN 200410098848 A CN200410098848 A CN 200410098848A CN 1631782 A CN1631782 A CN 1631782A
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- ammonia
- ammonium sulfate
- pump
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Abstract
The invention discloses a method refines ammonia sulfate in the smoke desulfitation product in the ammonia process which is by inducting out the desulfitation circulating liquor and continuously evaporating, crystallizing, separating and drying the liquor to obtain solid ammonia sulfate which can be raw material supplement of complex fertilizer production, so that produce fertilizer with wastes which converts wastes to uses.
Description
Technical field
The present invention relates to a kind of method of from the ammonia type flue gas desulfurizing resultant, extracting ammonium sulfate.
Background technology
At present, the general employing of resultant of flue gas desulfurization abandoned method in the ammonia type flue gas desulfurizing industry, wasted a large amount of resources.How the resultant with ammonia-ammonium sulfate method flue gas desulfurization reclaims by certain technology, makes it as a kind of comprehensive utilization of resources, will reduce bigger running cost for enterprise, creates good social benefit and enterprise income.
Summary of the invention
The technical issues that need to address of the present invention just are to overcome the defective that ammonia type flue gas desulfurizing resultant in the prior art is abandoned method, and a kind of method of extracting ammonium sulfate from the ammonia type flue gas desulfurizing resultant is provided, and the method for will abandoning changes absorption method into.Make full use of the sulphur resource, realized the resultant of flue gas desulfurization comprehensive utilization of resources, with useless composting, turn waste into wealth.Reduced secondary pollution.
For addressing the above problem, the present invention adopts following technical scheme:
A kind of method of extracting ammonium sulfate from the ammonia type flue gas desulfurizing resultant of the present invention, it is by drawing ammonia-sulphur ammonia type flue gas desulfurizing circulation fluid, adopting steam consecutive evaporation, crystallization, separation, dry extraction solid ammonium sulfate.
Preferably, desulphurization circulating liquid of the present invention is the resultant ammoniumsulphate soln in the ammonia type flue gas desulfurizing, by steam consecutive evaporation, crystallization, separation, drying, the ammonium sulfate extraction in the liquid is made crystal or powdery solid sulphur ammonium byproduct.
Steam consecutive evaporation of the present invention adopts steam heating that ammoniumsulphate soln is carried out single-action or double-effect evaporation for adopting the single-action or the economic benefits and social benefits pump circulation of vapo(u)r blasting band heat pump.The present invention determines to adopt single-action or economic benefits and social benefits processing unit according to the generation extracted amount of ammonium sulfate.The single-effect evaporation crystallization processes, big energy-consuming efficient is lower, but the few reduced investment of equipment.The double-effect evaporation crystallization processes, energy consumption is low, efficient is high, but equipment is many, the investment high.
Method steps of the present invention is:
1), draws ammonia-sulphur ammonia type flue gas desulfurizing circulation fluid: the ammonium sulfate (NH in the desulphurization system circulatory pool
4)
2SO
4Solution replenishes the ammonium sulfate extraction system that enters before forced circulation pump;
2), evaporation: steam is sent into steam heater heating by vapour pump, and the secondary steam after the evaporation utilizes vapor jet pump partly to draw back to mix and utilizes, the device condensation that is condensed of remaining secondary steam, the vacuum in the condenser is kept with a vacuum pump; Under vacuum condition, be beneficial to vapor condenses;
3), crystallization: the ammonium sulfate raw material that enters the ammonium sulfate extraction system enters the continuous evaporative crystallization device, and steam is pumped into the continuous evaporative crystallization device by vapo(u)r blasting simultaneously, and ammonia sulfate crystal generates;
4), separate: the solid-liquid mixed pulp after the crystallization enters the crystallization cooling tank, is transported to whizzer by slush pump and carries out solid-liquid separation;
5), drying: it is further dry that the solid after centrifugal is sent to drying machine, and liquid returns the desulphurization system circulatory pool to be continued to use.
Technological principle of the present invention is, adopts the single-action or the economic benefits and social benefits pump circulation of vapo(u)r blasting band heat pump, and ammoniumsulphate soln is evaporated and concentrates and crystallization, through mechanical separation, dry back acquisition solid ammonium sulfate.Raw material sulphuric acid ammonium (NH
4)
2SO
4Solution replenishes the ammonium sulfate extraction system that enters before the forced circulation pump, doublely plays the water effect of stirring, and sends into the steam heater heating by recycle pump immediately.Because of ammonium sulfate (NH
4)
2SO
4Solubleness is subjected to Temperature Influence less, and system is originally as low-temperature working, so do not need cooling system to cool off material.Secondary steam after the evaporation utilizes the live steam squirt pump partly to draw back and mix to utilize, the device condensation that is condensed of remaining secondary steam, and the vacuum in the system is kept with a vacuum pump.Ammonia sulfate crystal generates in the continuous evaporative crystallization device, and the solid-liquid mixed pulp enters the crystallization cooling tank, is transported to whizzer by slush pump and carries out solid-liquid separation.The solid ammonium sulfate that obtains contains moisture below 3%, does not carry out drying treatment.The live steam consumption is big relatively.Solid is sent to drying machine further dry back pack, and drying is handled, and the solid ammonium sulfate that obtains contains moisture below 0.5%, and the live steam consumption is relatively littler.Liquid returns the desulphurization system circulatory pool to be continued to use.
Beneficial effect of the present invention is: solved ammonia type flue gas desulfurizing resultant ammonium sulfate (NH
4)
2SO
4Solution is made solid and is reclaimed problem, makes resultant of flue gas desulfurization obtain comprehensive utilization of resources, has reduced running cost, obtains good social benefit and economic benefit.
Description of drawings
Fig. 1 is embodiment 1 a described process flow sheet of the present invention.
Fig. 2 is embodiment 2 described process flow sheets of the present invention.
Embodiment
Embodiment 1
As shown in Figure 1, step of the present invention is:
1), draws ammonia-sulphur ammonia type flue gas desulfurizing circulation fluid: the ammonium sulfate (NH in the desulphurization system circulatory pool
4)
2SO
4Solution replenishes the raw material storage tank that enters the ammonium sulfate extraction system before forced circulation pump;
2), evaporation: 0.8Mpa, 170 ℃ steam enters the ammonium sulfate evaporative crystallizer through the steam-jet compression pump, the secondary steam after the evaporation is partly drawn back and mix to be utilized, the device condensation that is condensed of remaining secondary steam, the vacuum in the condenser is kept with a vacuum pump;
3), crystallization: 40% ammoniumsulphate soln in the raw material storage tank enters the ammonium sulfate evaporative crystallizer by feedstock pump through plate-type heat exchanger, and ammonia sulfate crystal generates;
4), separate: the solid-liquid mixed pulp is transported to whizzer through the crystallization cooling tank by stock pump and carries out solid-liquid separation;
5), drying: it is further dry that solid is sent to drying machine, and liquid returns the desulphurization system circulatory pool to be continued to use.
Present device comprises vapor jet pump, ammonium sulfate evaporative crystallizer, condensate pump, vacuum pump, plate-type heat exchanger, condenser, whizzer, recycle pump, raw material storage tank etc.
Embodiment 2
As shown in Figure 2, step of the present invention is:
1), draws ammonia-sulphur ammonia type flue gas desulfurizing circulation fluid: the ammonium sulfate (NH in the desulphurization system circulatory pool
4)
2SO
4Solution replenishes the Raw material pail that enters the ammonium sulfate extraction system before forced circulation pump;
2), evaporation: 0.8Mpa, 170 ℃ steam enters ammonium sulfate evaporative crystallization separator through the steam-jet compression pump, secondary steam after the evaporation is partly drawn back and mix to be utilized, the device condensation that is condensed of remaining secondary steam, and the vacuum in the condenser is kept with a vacuum pump;
3), crystallization: 40% ammoniumsulphate soln in the raw material storage tank enters ammonium sulfate evaporative crystallization separator by the feedstock pump heater via, and ammonia sulfate crystal generates;
4), separate: the solid-liquid mixed pulp is transported to whizzer by stock pump and carries out solid-liquid separation after the crystallization;
5), drying: separate the back solid and be sent to further drying of drying machine, liquid returns the desulphurization system circulatory pool to be continued to use.
The present invention includes vapor jet pump, well heater, Crystallization Separation device, recycle pump, condensation pump, vacuum pump, whizzer, raw material tank etc.
Technical process and the principle of embodiment 1 and embodiment 2 are basic identical, but equipment inner structure is different with body, for different production sites disposes, for different sulphur ammonium growing amounts disposes.
Claims (4)
1, a kind of method of extracting ammonium sulfate from the ammonia type flue gas desulfurizing resultant is characterized in that it is by drawing ammonia-sulphur ammonia type flue gas desulfurizing circulation fluid, adopting steam consecutive evaporation, crystallization, separation, dry extraction solid ammonium sulfate.
2, the method for claim 1, it is characterized in that described desulphurization circulating liquid is the resultant ammoniumsulphate soln in the ammonia type flue gas desulfurizing, by steam consecutive evaporation, crystallization, separation, drying, the ammonium sulfate extraction in the liquid is made crystal or powdery solid sulphur ammonium byproduct.
3, method as claimed in claim 1 or 2 is characterized in that: described steam consecutive evaporation adopts steam heating that ammoniumsulphate soln is carried out single-action or double-effect evaporation for adopting the single-action or the economic benefits and social benefits pump circulation of vapo(u)r blasting band heat pump.
4,, it is characterized in that its step is as the arbitrary described method of claim 1-3:
1), draws ammonia-sulphur ammonia type flue gas desulfurizing circulation fluid: the ammonium sulfate (NH in the desulphurization system circulatory pool
4)
2SO
4Solution replenishes the ammonium sulfate extraction system that enters before forced circulation pump;
2), evaporation: steam is sent into steam heater heating by vapour pump, and the secondary steam after the evaporation utilizes vapor jet pump partly to draw back to mix and utilizes, the device condensation that is condensed of remaining secondary steam, the vacuum in the condenser is kept with a vacuum pump; Under vacuum condition, be beneficial to vapor condenses;
3), crystallization: the ammonium sulfate raw material that enters the ammonium sulfate extraction system enters the continuous evaporative crystallization device, and steam is pumped into the continuous evaporative crystallization device by vapo(u)r blasting simultaneously, and ammonia sulfate crystal generates;
4), separate: the solid-liquid mixed pulp after the crystallization enters the crystallization cooling tank, is transported to whizzer by slush pump and carries out solid-liquid separation;
5), drying: it is further dry that the solid after centrifugal is sent to drying machine, and liquid returns the desulphurization system circulatory pool to be continued to use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410098848 CN1631782A (en) | 2004-12-17 | 2004-12-17 | Method for extracting ammonia sulfate from resultant of flue gas desulfurization by ammonia method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410098848 CN1631782A (en) | 2004-12-17 | 2004-12-17 | Method for extracting ammonia sulfate from resultant of flue gas desulfurization by ammonia method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1631782A true CN1631782A (en) | 2005-06-29 |
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ID=34847977
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|---|---|---|---|
| CN 200410098848 Pending CN1631782A (en) | 2004-12-17 | 2004-12-17 | Method for extracting ammonia sulfate from resultant of flue gas desulfurization by ammonia method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157004B (en) * | 2007-08-02 | 2010-08-18 | 武汉凯迪电力环保有限公司 | Spray drying and multilevel cooling integration technics of wet-type ammonia desulfuration offspring |
| CN101934192A (en) * | 2010-09-16 | 2011-01-05 | 江苏和亿昌环保工程科技有限公司 | Double-tower ammonia-method desulfurization process |
| CN102205201A (en) * | 2011-06-10 | 2011-10-05 | 赵玉斌 | Recovering process for desulphurized ammonium sulfate/magnesium sulfate |
| CN104310429A (en) * | 2014-09-30 | 2015-01-28 | 武汉星联和工程有限公司 | Novel treatment method for mother liquor obtained after centrifugal separation of ammonium sulfate in ammonia-process desulfurization |
| CN104355346A (en) * | 2014-12-02 | 2015-02-18 | 成都华西堂投资有限公司 | Heat pump evaporation treatment technology of ammonium-containing solution during flue gas purification |
| CN108423690A (en) * | 2018-03-23 | 2018-08-21 | 天华化工机械及自动化研究设计院有限公司 | A kind of method that heat pump flash distillation stripping deamination directly generates solid ammonium sulfate |
| CN109265200A (en) * | 2018-09-30 | 2019-01-25 | 云南天朗环境科技有限公司 | The technique and its device of ammonium sulfate processing in a kind of flue gas of sintering machine system |
| CN112999674A (en) * | 2021-02-25 | 2021-06-22 | 江苏新世纪江南环保股份有限公司 | Apparatus and method for removing chloride ions from ammonia desulfurization solution |
-
2004
- 2004-12-17 CN CN 200410098848 patent/CN1631782A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157004B (en) * | 2007-08-02 | 2010-08-18 | 武汉凯迪电力环保有限公司 | Spray drying and multilevel cooling integration technics of wet-type ammonia desulfuration offspring |
| CN101934192A (en) * | 2010-09-16 | 2011-01-05 | 江苏和亿昌环保工程科技有限公司 | Double-tower ammonia-method desulfurization process |
| CN102205201A (en) * | 2011-06-10 | 2011-10-05 | 赵玉斌 | Recovering process for desulphurized ammonium sulfate/magnesium sulfate |
| CN102205201B (en) * | 2011-06-10 | 2012-11-21 | 赵玉斌 | Recovering process for desulphurized ammonium sulfate/magnesium sulfate |
| CN104310429A (en) * | 2014-09-30 | 2015-01-28 | 武汉星联和工程有限公司 | Novel treatment method for mother liquor obtained after centrifugal separation of ammonium sulfate in ammonia-process desulfurization |
| CN104355346A (en) * | 2014-12-02 | 2015-02-18 | 成都华西堂投资有限公司 | Heat pump evaporation treatment technology of ammonium-containing solution during flue gas purification |
| CN108423690A (en) * | 2018-03-23 | 2018-08-21 | 天华化工机械及自动化研究设计院有限公司 | A kind of method that heat pump flash distillation stripping deamination directly generates solid ammonium sulfate |
| CN109265200A (en) * | 2018-09-30 | 2019-01-25 | 云南天朗环境科技有限公司 | The technique and its device of ammonium sulfate processing in a kind of flue gas of sintering machine system |
| CN112999674A (en) * | 2021-02-25 | 2021-06-22 | 江苏新世纪江南环保股份有限公司 | Apparatus and method for removing chloride ions from ammonia desulfurization solution |
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