CN106823772A - Desulfuration in furnace synergist and desulfurizing agent - Google Patents
Desulfuration in furnace synergist and desulfurizing agent Download PDFInfo
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- CN106823772A CN106823772A CN201710237719.0A CN201710237719A CN106823772A CN 106823772 A CN106823772 A CN 106823772A CN 201710237719 A CN201710237719 A CN 201710237719A CN 106823772 A CN106823772 A CN 106823772A
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- desulfuration
- synergist
- furnace
- desulfurizing agent
- sulphur
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- 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
- B01D53/81—Solid phase processes
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- 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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The present invention discloses a kind of desulfuration in furnace synergist.The desulfuration in furnace synergist includes following composition by weight percentage：Pyrolusite powder：20~50%；Di-iron trioxide：10~30%；Alchlor：10~20%；Sodium chloride：10~20%；Calcium chloride 10~20%.The desulfuration in furnace synergist that the present invention is provided, under the conditions of low Ca/S ratios, can significantly improve desulfuration efficiency.The present invention also provides a kind of desulfurizing agent of the application desulfuration in furnace synergist.
Description
【Technical field】
The present invention relates to filed of flue gas purification, and in particular to a kind of desulfuration in furnace synergist and desulfurizing agent.
【Background technology】
Technology of Circulating Fluidized Bed Boiler is the high-efficiency low-pollution cleaning burning branch art for developing rapidly in recent ten years, state
This technology the field such as utilizes to have obtained widespread commercial use in station boiler, Industrial Boiler and offal treatment on border, and
Develop to the large circulating fluidized bed boiler of hundreds of thousands multikilowatt scale；Domestic research, development and application in this respect also by
Gradually rise, the CFBB of 600MW has been developed at present and has been come into operation.
Fire coal S0 is controlled at present2Before the method for pollution mainly has a coal combustion, burning neutralize three kinds of desulfurization, recycle stream after burning
Fluidized bed boiler with desulfurization after burning in desulfurization after desulfurization, burning in burning or burning typically by the way of being combined.With air
Emission request is to SO2Increasingly strict, the lime stone-stone after large-scale CFBB all auxiliary constructions stove of concentration of emission
Cream wet desulphurization device, but Limestone-gypsum Wet Flue Gas Desulfurization Process technique after stove is used, and its fixed investment is big, and operation power consumption is high, field
Ground floor space is big, and can produce waste water etc..
With lime stone or lime as desulfurizing agent, with small investment, the advantages of easy to operate, but it is deposited for desulfurization in being burnt in stove
In the shortcoming that desulfurized effect is poor.The consumption of desulfurizing agent is typically represented with the mol ratio (Ca/S) of calcium and sulphur.Work as fluidizing velocity
One timing, desulfurization degree increases and increases with Ca/S；When the timings of Ca/s mono-, desulfurization degree is raised with fluidizing velocity reduction.To make to take off
Sulphur rate up to 90%, then Ca/S=3~5 of fluid bed, this will make consumption of limestone amount excessive, in practical operation for balance it is various because
The influence of element, practical Ca/S=1.5~2.5.But, when Ca/S is than relatively low, desulfuration efficiency also in significantly reducing, causes simultaneously
Final SO2Discharge can not meet environmental requirement.
Therefore, it is necessary to providing a kind of new technique solves above-mentioned technical problem.
【The content of the invention】
The purpose of the present invention is to overcome above-mentioned technical problem, there is provided one kind can be significantly improved de- under the conditions of low Ca/S ratios
The desulfuration in furnace synergist and desulfurizing agent of sulphur efficiency.
The technical scheme is that：
A kind of desulfuration in furnace synergist, including following composition by weight percentage：
Pyrolusite powder：20~50%；
Di-iron trioxide：10~30%；
Alchlor：10~20%；
Sodium chloride：10~20%；
Calcium chloride 10~20%.
The present invention also provides a kind of desulfurizing agent.The desulfurizing agent includes following composition by weight percentage：
Sulphur-fixing agent 95-99%；
Synergist 1-5%；
Wherein synergist is the desulfuration in furnace synergist.
Preferably, the sulphur-fixing agent is calcium carbonate or calcium oxide.
Preferably, the desulfurizing agent is powdered, and its particle diameter is 100-300 mesh.
Preferably, during the desulfurizing agent participates in desulphurization reaction, Ca/S is than control in 1.2-1.8.
Compared with correlation technique, desulfuration in furnace synergist and desulfurizing agent that the present invention is provided have the advantages that：
First, apply the desulfuration in furnace synergist that the present invention is provided carries out desulfurization test in desulfurizing agent, tests 5MW's
Carried out in CFBB, in ature of coal sulfur-bearing percentage be 1.0~1.5%, control Ca/S ratios under the conditions of 1.2-1.8,
Through experiment, desulfuration efficiency is more than 85%, up to 90%.Therefore, the addition of synergist, is remarkably improved desulfuration efficiency.
2nd, the desulfurizing agent that the present invention is provided, controllable Ca/S ratios are carried out under conditions of relatively low, and desulfuration efficiency is significantly,
Desulphurization cost can be significantly reduced.
【Specific embodiment】
Below will the invention will be further described by specific embodiment.
The action principle of the desulfuration in furnace synergist for below providing the present invention first is described in detail.
Desulfurization reaction mechanism：Coal in high-temp combustion, sulphur-fixing agent calcium carbonate at high temperature rapidly decompose generation CaO, CaO with
The SO that coal combustion is released2There is following reaction, directly or by generation CaSO3CaSO is generated after oxidation4.Reaction equation is such as
Under：
CaO+SO2→CaSO3
CaSO3+1/2O2→CaSO4
CaO+SO2+1/2O2→CaSO4
Lime stone and SO2Directly there is vulcanization reaction generation CaSO4：
CaCO3+SO2+l/2O2→CaSO4+CO2
In desulfuration in furnace synergist, pyrolusite main component is MnO2, it is a kind of stronger oxidizer composition, its addition can
To make up hypoxia response in boiler combustion well, SO can be effectively facilitated2、CaSO3Deng lower valency compound oxidation into more steady
Fixed SO3、CaSO4Etc. high-valence state compound.Its oxidation to NO simultaneously equally has good effect, can reduce NOxDischarge
Concentration.
Fe2O3There is certain catalytic action to desulphurization reaction, reaction activity is effectively reduced, be more prone to reaction.
Al2O3The pyrolytic of sulfur retention productses can also be suppressed, while the CaSO with high thermal stability can be formed4；CaO and Al2O3
Double salt 3CaO3Al2O3·3CaSO4, can cover or wrap up CaSO4The surface of crystal, suppresses CaSO4Decompose, also can be effective
Improve captured sulfur result.
The addition of NaCl, can reduce SO2The precipitation total amount of S in 400~600 DEG C of intervals, it is main reduce organic sulfur to
SO2The generating rate and growing amount of oxidation.
The addition of CaCl, can reduce SO2The precipitation total amount of S in 600~700 DEG C of intervals, it is main reduce inorganic sulfur to
SO2The generating rate and growing amount of oxidation.
Hereinafter desulfuration in furnace synergist and desulfurizing agent that the present invention is provided, and application are illustrated by specific embodiment again
Effect in sulfur removal technology.
Embodiment 1
The composition of desulfurizing agent, in percentage by weight including following composition：
Sulphur-fixing agent 95%；
Desulfuration in furnace synergist 5%.
Wherein sulphur-fixing agent is calcium carbonate or lime powder；
Desulfuration in furnace synergist includes following composition by weight percentage：
Pyrolusite powder：20%；Di-iron trioxide：30%；Alchlor：10%；Sodium chloride：20%；Calcium chloride 20%.
After above-mentioned raw materials are mixed in proportion, into ball mill in grinding and well mixed, and control the powder particle size to be
100-300 mesh, prepares the desulfurizing agent.
The desulfurizing agent is applied to carry out desulfurization test in the CFBB of 5MW, sulfur-bearing percentage in ature of coal
It is 1.0~1.5%；Between 1.2-1.8, after testing, desulfuration efficiency is 87% to Ca/S ratios in control reaction.
Embodiment 2
The composition of desulfurizing agent, in percentage by weight including following composition：
Sulphur-fixing agent 97%；
Desulfuration in furnace synergist 3%.
Wherein sulphur-fixing agent is calcium carbonate or lime powder；
Desulfuration in furnace synergist includes following composition by weight percentage：
Pyrolusite powder：30%；Di-iron trioxide：25%；Alchlor：20%；Sodium chloride：15%；Calcium chloride 10%.
The desulfurizing agent is applied to carry out desulfurization test in the CFBB of 5MW, sulfur-bearing percentage in ature of coal
It is 1.0~1.5%；Between 1.2-1.8, after testing, desulfuration efficiency is 90% to Ca/S ratios in control reaction.
Embodiment 3
The composition of desulfurizing agent, in percentage by weight including following composition：
Sulphur-fixing agent 98%；
Desulfuration in furnace synergist 2%.
Wherein sulphur-fixing agent is calcium carbonate or lime powder；
Desulfuration in furnace synergist includes following composition by weight percentage：
Pyrolusite powder：20%；Di-iron trioxide：20%；Alchlor：20%；Sodium chloride：20%；Calcium chloride 20%.
The desulfurizing agent is applied to carry out desulfurization test in the CFBB of 5MW, sulfur-bearing percentage in ature of coal
It is 1.0~1.5%；Between 1.2-1.8, after testing, desulfuration efficiency is 88% to Ca/S ratios in control reaction.
Embodiment 4
The composition of desulfurizing agent, in percentage by weight including following composition：
Sulphur-fixing agent 99%；
Desulfuration in furnace synergist 1%.
Wherein sulphur-fixing agent is calcium carbonate or lime powder；
Desulfuration in furnace synergist includes following composition by weight percentage：
Pyrolusite powder：50%；Di-iron trioxide：10%；Alchlor：20%；Sodium chloride：10%；Calcium chloride 10%.
The desulfurizing agent is applied to carry out desulfurization test in the CFBB of 5MW, sulfur-bearing percentage in ature of coal
It is 1.0~1.5%；Between 1.2-1.8, after testing, desulfuration efficiency is 86% to Ca/S ratios in control reaction.
Embodiment 5
The composition of desulfurizing agent, in percentage by weight including following composition：
Sulphur-fixing agent 96%；
Desulfuration in furnace synergist 4%.
Wherein sulphur-fixing agent is calcium carbonate or lime powder；
Desulfuration in furnace synergist includes following composition by weight percentage：
Pyrolusite powder：40%；Di-iron trioxide：15%；Alchlor：15%；Sodium chloride：15%；Calcium chloride 15%.
The desulfurizing agent is applied to carry out desulfurization test in the CFBB of 5MW, sulfur-bearing percentage in ature of coal
It is 1.0~1.5%；Between 1.2-1.8, after testing, desulfuration efficiency is 92% to Ca/S ratios in control reaction.
Compared with correlation technique, desulfuration in furnace synergist and desulfurizing agent that the present invention is provided have the advantages that：
First, apply the desulfuration in furnace synergist that the present invention is provided carries out desulfurization test in desulfurizing agent, tests 5MW's
Carried out in CFBB, in ature of coal sulfur-bearing percentage be 1.0~1.5%, control Ca/S ratios under the conditions of 1.2-1.8,
Through experiment, desulfuration efficiency is more than 85%, up to 90%.Therefore, the addition of synergist, is remarkably improved desulfuration efficiency.
2nd, the desulfurizing agent that the present invention is provided, controllable Ca/S ratios are carried out under conditions of relatively low, and desulfuration efficiency is significantly,
Desulphurization cost can be significantly reduced.
Above-described is only embodiments of the present invention, it should be noted here that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, improvement can also be made, but these belong to protection model of the invention
Enclose.
Claims (5)
1. a kind of desulfuration in furnace synergist, it is characterised in that including following composition by weight percentage：
Pyrolusite powder：20~50%；
Di-iron trioxide：10~30%；
Alchlor：10~20%；
Sodium chloride：10~20%；
Calcium chloride 10~20%.
2. a kind of desulfurizing agent, it is characterised in that including following composition by weight percentage：
Sulphur-fixing agent 95-99%；
Synergist 1-5%；
Wherein synergist is the desulfuration in furnace synergist described in claim 1.
3. desulfurizing agent according to claim 2, it is characterised in that the sulphur-fixing agent is calcium carbonate or calcium oxide.
4. desulfurizing agent according to claim 3, it is characterised in that the desulfurizing agent is powdered, and its particle diameter is 100-300
Mesh.
5. desulfurizing agent according to claim 4, it is characterised in that the desulfurizing agent is participated in desulphurization reaction, Ca/S is than control
System is in 1.2-1.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710237719.0A CN106823772A (en) | 2017-04-12 | 2017-04-12 | Desulfuration in furnace synergist and desulfurizing agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710237719.0A CN106823772A (en) | 2017-04-12 | 2017-04-12 | Desulfuration in furnace synergist and desulfurizing agent |
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| CN106823772A true CN106823772A (en) | 2017-06-13 |
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| CN201710237719.0A Pending CN106823772A (en) | 2017-04-12 | 2017-04-12 | Desulfuration in furnace synergist and desulfurizing agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107537291A (en) * | 2017-08-10 | 2018-01-05 | 黑豹防水建材（新丰）有限公司 | A kind of calcium-based desulfurization additive and the desulfurization absorbent containing the additive |
| CN109364971A (en) * | 2018-10-22 | 2019-02-22 | 新疆环境工程技术有限责任公司 | Desulphurization catalyst and preparation method thereof |
Citations (6)
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|---|---|---|---|---|
| JPH105537A (en) * | 1996-06-20 | 1998-01-13 | Okayama Pref Gov | Calcium desulfurizing agent, and method for desulfurizing coal combustion gas by using the same |
| WO2002016026A2 (en) * | 2000-08-25 | 2002-02-28 | Apyron Technologies, Inc. | Adsorbent and/or catalyst compounds promoted with halide ions and methods of making and using thereof |
| CN1398955A (en) * | 2001-07-23 | 2003-02-26 | 王保行 | Furnace sulfur-curing agent for use in thermal power plant |
| CN1699526A (en) * | 2005-06-13 | 2005-11-23 | 华中科技大学 | Coal combustion and sulfur fixation composite additives |
| CN101306305A (en) * | 2008-07-13 | 2008-11-19 | 兖矿国宏化工有限责任公司 | Fume eject-calcium desulfurizing techinique in pulverized coal fired boiler |
| CN102068886A (en) * | 2010-12-15 | 2011-05-25 | 沈阳工程学院 | Desulfurizer compounded by industrial wastes and production method thereof |
-
2017
- 2017-04-12 CN CN201710237719.0A patent/CN106823772A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH105537A (en) * | 1996-06-20 | 1998-01-13 | Okayama Pref Gov | Calcium desulfurizing agent, and method for desulfurizing coal combustion gas by using the same |
| WO2002016026A2 (en) * | 2000-08-25 | 2002-02-28 | Apyron Technologies, Inc. | Adsorbent and/or catalyst compounds promoted with halide ions and methods of making and using thereof |
| WO2002016026A3 (en) * | 2000-08-25 | 2004-02-26 | Apyron Technologies Inc | Adsorbent and/or catalyst compounds promoted with halide ions and methods of making and using thereof |
| CN1398955A (en) * | 2001-07-23 | 2003-02-26 | 王保行 | Furnace sulfur-curing agent for use in thermal power plant |
| CN1699526A (en) * | 2005-06-13 | 2005-11-23 | 华中科技大学 | Coal combustion and sulfur fixation composite additives |
| CN101306305A (en) * | 2008-07-13 | 2008-11-19 | 兖矿国宏化工有限责任公司 | Fume eject-calcium desulfurizing techinique in pulverized coal fired boiler |
| CN102068886A (en) * | 2010-12-15 | 2011-05-25 | 沈阳工程学院 | Desulfurizer compounded by industrial wastes and production method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107537291A (en) * | 2017-08-10 | 2018-01-05 | 黑豹防水建材（新丰）有限公司 | A kind of calcium-based desulfurization additive and the desulfurization absorbent containing the additive |
| CN109364971A (en) * | 2018-10-22 | 2019-02-22 | 新疆环境工程技术有限责任公司 | Desulphurization catalyst and preparation method thereof |
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Application publication date: 20170613 |