CN109663499A - Quadruple effect denitrfying agent composition and its method of denitration - Google Patents
Quadruple effect denitrfying agent composition and its method of denitration Download PDFInfo
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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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- 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
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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
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Abstract
The present invention relates to denitration in the stove technical fields, specially a kind of quadruple effect denitrfying agent composition, including (according to mass percent meter): denitrfying agent 25-45%, catalyst 10-15%, oxidant 10-12%, surfactant 5-8%, titanium dioxide 8-12%, sulphur-fixing agent 20-30%, additive for sulfur capture 1-3% and solid sulphur auxiliary agent 1-2%, the invention also discloses a kind of method of denitration of quadruple effect denitrfying agent composition, comprising the following steps: S1: weighing proportion；S2: dry；S3: grinding；S4: denitration.Have the beneficial effect that the formula of the invention is reasonable, by using Ca (OH)2As the sulphur-fixing agent of denitrfying agent, catalyst poisoning is avoided, reduces cost, out of stock efficient products quality is improved and is effectively controlled, easy to operate, applicability is wide, and operating cost is low, Ca (OH)2Product CaO realizes crystal lattice rearrangement by additive for sulfur capture after decomposition, can significantly improve sulphur-fixing agent utilization rate.
Description
Technical field
The present invention relates to denitration in the stove technical field, specially a kind of quadruple effect denitrfying agent composition and its method of denitration.
Background technique
China's atmosphere pollution is serious, estimates according to data, coal fire discharged Air Pollutants, as flue dust, SO2, NOx,
CO2 etc., total amount account for about the 96% of entire fuel combustion discharge amount.Wherein, coal fire discharged S02 accounts for all kinds of pollution sources total releases
87%, secondly NOx account for the 6% of all kinds of pollution sources total releases.SO2 and NOx is the main reason for producing main acid rain, due to acid rain
Aquatic ecosystem, terriecosystems, corrosion material can be endangered in different ways and influence human health, harmfulness pole
Greatly, so acid rain has become one of the main Environmental Problems that the whole world faces at present.To solve acid rain problem, countries in the world are all being adopted
The discharge for taking effective controlling measurement S02 and NOx, most important of which is that clean coal technology.
Clean coal technology is one of major technique that our times various countries solve environmental problem and high-tech international competition
A key areas.Clean coal technology is related to Coal dressing, burning, conversion, contamination control etc., and core technology is coal
High performance clean burning.SO2 the and NOx control technology that countries in the world are developed, develop, using mainly has: desulphurization denitration before burning, such as
Coal separation；Desulphurization denitration in burning, such as coal combustion and sulfur fixation denitration, in-furnace calcium spraying, circulating fluidized bed combustion；Desulfurization and de- after burning
Nitre, i.e. flue gas desulfurization and denitrification.The most effective means of external control SO2 and NOx emission are that coal washing and flue gas desulfurization are de- at present
Nitre technology, but its capital expenditure and day-to-day operation are costly.It is easy using simple process, low in cost according to China's national situation
Coal combustion and sulfur fixation denitration technology be the effective means for controlling SO2 and NOx emission, and control China air pollution due to coal combustion has
One of effect measure.
Chinese patent CN106861431B discloses a kind of quadruple effect denitrfying agent composition and its method of denitration, denitrfying agent include
The raw material of following weight percent forms: reducing agent 50%-78%, catalyst 15%-30%, adsorbent 1%-10%, promoting
Agent 1%-10%, dispersing agent 1%-10%, activator 1%-10%, bleeding agent 1%-10%, sustained release agent 1%-10% and initiation
Agent 1%-10%, method of denitration are as follows: (1) raw material is chosen, by the raw material of selection successively by crushing, being ground up, sieved, mixed processes
Prepare quadruple effect denitrfying agent composition described in claim 1；(2) quadruple effect denitrfying agent composition obtained in step (1) is infused
Enter in denitration reaction area, reacts in 500 DEG C~800 DEG C of at a temperature of quadruple effect denitrfying agent composition with the NOx in flue gas, generate
CO, CO2, N2 and H2O.The patent does not consolidate sulphur composition, and catalyst is easy poisoning.
Summary of the invention
The purpose of the present invention is to provide a kind of quadruple effect denitrfying agent composition and its method of denitration, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the invention provides the following technical scheme: a kind of quadruple effect denitrfying agent composition and its denitration side
Method, including (according to mass percent meter): denitrfying agent 25-45%, catalyst 10-15%, oxidant 10-12%, surface-active
Agent 5-8%, titanium dioxide 8-12%, sulphur-fixing agent 20-30%, additive for sulfur capture 1-3% and solid sulphur auxiliary agent 1-2%.
Preferably, the denitrfying agent is one or more of urea, ammonium chloride, ammonium formate and ammonium acetate.
Preferably, the catalyst is V2O5、TiO2With the mixture of Co, wherein V2O5To analyze pure, TiO2It is received for DT-51
Meter level, Ti/Co=0.05.
Preferably, the oxidant is K2MnO4And KMnO4Mixture.
Preferably, the surfactant be dioctyl succinate disulfonate acid, neopelex, sodium glycocholate,
One or more of lauryl sodium sulfate, sulfated castor oil, alkylolamides.
Preferably, the sulphur-fixing agent is powdered Ca (OH)2, wherein Ca (OH)2Partial size≤0.2mm.
Preferably, the additive for sulfur capture is NaCO3, wherein NaCO3Partial size≤0.2mm.
Preferably, the solid sulphur auxiliary agent is one or more of Na, Mg, Al, Zn, Co, Ti.
9. a kind of method of denitration of such as described in any item quadruple effect denitrfying agent compositions of claim 1-8, which is characterized in that
The following steps are included:
S1: weighing proportion, matches drawn material according to above-mentioned material；
S2: it is dry, denitrfying agent, catalyst, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and solid sulphur auxiliary agent investment vacuum are done
In dry case, control drying temperature is 70-90 DEG C, after continuous drying 1h, is taken out, mixing；
S3: grinding, by denitrfying agent, catalyst, oxidant, surfactant, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and
Gu sulphur auxiliary agent is put into grinder, grind, be sieved, mixing obtains quadruple effect denitrfying agent composition；
S4: denitration, by quadruple effect denitrfying agent composition inject denitration in the stove reaction zone in, 500 DEG C~800 DEG C at a temperature of
Quadruple effect denitrfying agent composition is reacted with the NOx in flue gas, generates CO, CO2, N2, H2O, CaSO4 and Na SO4.
Preferably, in step 3, the partial size mesh of the quadruple effect denitrfying agent composition is 20 mesh.
Compared with prior art, the beneficial effects of the present invention are:
1. the formula of the invention is reasonable, by using Ca (OH)2As the sulphur-fixing agent of denitrfying agent, catalyst poisoning is avoided, is dropped
Low cost improves out of stock efficient products quality and is effectively controlled, and easy to operate, applicability is wide, and operating cost is low, Ca (OH)2
Product CaO realizes crystal lattice rearrangement by additive for sulfur capture after decomposition, can significantly improve sulphur-fixing agent utilization rate；
2. the present invention by mixing Co element in the catalyst, raising catalyst water resistant is poisoned and the ability of sulfur poisoning-resistant,
And by introducing K in quadruple effect denitrfying agent composition2MnO4And KMnO4As oxide, fired coal combustion efficiency, economic benefit are improved
It is good；
3. the present invention changes fired coal combustion characteristic, so that coal-fired release SO by adding solid sulphur auxiliary agent2It is more uniform, it mentions
The fixed element sulphur effect of high sulphur-fixing agent.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment 1
The present invention provides a kind of technical solution: a kind of quadruple effect denitrfying agent composition, including (according to mass percent meter): de-
Nitre agent 45%, catalyst 10%, oxidant 10%, surfactant 5%, titanium dioxide 8%, sulphur-fixing agent 20%, additive for sulfur capture
1% and solid sulphur auxiliary agent 1%.
A kind of method of denitration of quadruple effect denitrfying agent composition, comprising the following steps:
S1: weighing proportion, matches drawn material according to above-mentioned material；
S2: it is dry, denitrfying agent, catalyst, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and solid sulphur auxiliary agent investment vacuum are done
In dry case, control drying temperature is 70 DEG C, after continuous drying 1h, is taken out, mixing；
S3: grinding, by denitrfying agent, catalyst, oxidant, surfactant, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and
Gu sulphur auxiliary agent is put into grinder, grind, be sieved, mixing obtains quadruple effect denitrfying agent composition；
S4: denitration injects quadruple effect denitrfying agent composition in denitration in the stove reaction zone, de- in 500 DEG C of at a temperature of quadruple effect
Nitre agent composition is reacted with the NOx in flue gas, generates CO, CO2, N2, H2O, CaSO4 and Na SO4.
Wherein, denitrfying agent is the mixture of urea and ammonium chloride；Catalyst is V2O5、TiO2With the mixture of Co, wherein
V2O5To analyze pure, TiO2For DT-51 nanoscale, Ti/Co=0.05；Oxidant is K2MnO4And KMnO4Mixture；Surface is living
Property agent be neopelex；Sulphur-fixing agent is powdered Ca (OH)2, wherein Ca (OH)2Partial size be 0.2mm；Gu sulphur adds
Adding agent is NaCO3, wherein NaCO3Partial size be 0.2mm；Gu sulphur auxiliary agent is Na；In step 3, the grain of quadruple effect denitrfying agent composition
Diameter mesh is 20 mesh.
Embodiment 2
The present invention provides a kind of technical solution: a kind of quadruple effect denitrfying agent composition, including (according to mass percent meter): de-
Nitre agent 31%, catalyst 14%, oxidant 12%, surfactant 6%, titanium dioxide 10%, sulphur-fixing agent 24%, additive for sulfur capture
2% and solid sulphur auxiliary agent 1%.
A kind of method of denitration of quadruple effect denitrfying agent composition, comprising the following steps:
S1: weighing proportion, matches drawn material according to above-mentioned material；
S2: it is dry, denitrfying agent, catalyst, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and solid sulphur auxiliary agent investment vacuum are done
In dry case, control drying temperature is 78 DEG C, after continuous drying 1h, is taken out, mixing；
S3: grinding, by denitrfying agent, catalyst, oxidant, surfactant, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and
Gu sulphur auxiliary agent is put into grinder, grind, be sieved, mixing obtains quadruple effect denitrfying agent composition；
S4: denitration injects quadruple effect denitrfying agent composition in denitration in the stove reaction zone, de- in 700 DEG C of at a temperature of quadruple effect
Nitre agent composition is reacted with the NOx in flue gas, generates CO, CO2, N2, H2O, CaSO4 and Na SO4.
Wherein, denitrfying agent is the mixture of urea, ammonium chloride, ammonium formate and ammonium acetate；Catalyst is V2O5、TiO2And Co
Mixture, wherein V2O5To analyze pure, TiO2For DT-51 nanoscale, Ti/Co=0.05；Oxidant is K2MnO4And KMnO4's
Mixture；Surfactant is the mixture of neopelex and lauryl sodium sulfate；Sulphur-fixing agent is powdered
Ca(OH)2, wherein Ca (OH)2Partial size be 0.2mm；Additive for sulfur capture is NaCO3, wherein NaCO3Partial size be 0.2mm；Gu sulphur
Auxiliary agent is the mixture of Na, Mg, Al and Zn；In step 3, the partial size mesh of quadruple effect denitrfying agent composition is 20 mesh.
Embodiment 3
The present invention provides a kind of technical solution: a kind of quadruple effect denitrfying agent composition, including (according to mass percent meter): de-
Nitre agent 25%, catalyst 12%, oxidant 11%, surfactant 8%, titanium dioxide 11%, sulphur-fixing agent 28%, additive for sulfur capture
3% and solid sulphur auxiliary agent 2%.
A kind of method of denitration of quadruple effect denitrfying agent composition, comprising the following steps:
S1: weighing proportion, matches drawn material according to above-mentioned material；
S2: it is dry, denitrfying agent, catalyst, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and solid sulphur auxiliary agent investment vacuum are done
In dry case, control drying temperature is 82 DEG C, after continuous drying 1h, is taken out, mixing；
S3: grinding, by denitrfying agent, catalyst, oxidant, surfactant, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and
Gu sulphur auxiliary agent is put into grinder, grind, be sieved, mixing obtains quadruple effect denitrfying agent composition；
S4: denitration injects quadruple effect denitrfying agent composition in denitration in the stove reaction zone, de- in 600 DEG C of at a temperature of quadruple effect
Nitre agent composition is reacted with the NOx in flue gas, generates CO, CO2, N2, H2O, CaSO4 and Na SO4.
Wherein, denitrfying agent is the mixture of urea, ammonium chloride and ammonium formate；Catalyst is V2O5、TiO2With the mixing of Co
Object, wherein V2O5To analyze pure, TiO2For DT-51 nanoscale, Ti/Co=0.05；Oxidant is K2MnO4And KMnO4Mixing
Object；Surfactant is the mixture of dioctyl succinate disulfonate acid, neopelex and sodium glycocholate；Sulphur-fixing agent is
Powdered Ca (OH)2, wherein Ca (OH)2Partial size be 0.1mm；Additive for sulfur capture is NaCO3, wherein NaCO3Partial size be
0.1mm；Gu sulphur auxiliary agent is the mixture of Na and Al；In step 3, the partial size mesh of quadruple effect denitrfying agent composition is 20 mesh.
Embodiment 4
The present invention provides a kind of technical solution: a kind of quadruple effect denitrfying agent composition, including (according to mass percent meter): de-
Nitre agent 35%, catalyst 12%, oxidant 10%, surfactant 8%, titanium dioxide 9%, sulphur-fixing agent 21%, additive for sulfur capture
3% and solid sulphur auxiliary agent 2%.
A kind of method of denitration of quadruple effect denitrfying agent composition, comprising the following steps:
S1: weighing proportion, matches drawn material according to above-mentioned material；
S2: it is dry, denitrfying agent, catalyst, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and solid sulphur auxiliary agent investment vacuum are done
In dry case, control drying temperature is 90 DEG C, after continuous drying 1h, is taken out, mixing；
S3: grinding, by denitrfying agent, catalyst, oxidant, surfactant, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and
Gu sulphur auxiliary agent is put into grinder, grind, be sieved, mixing obtains quadruple effect denitrfying agent composition；
S4: denitration injects quadruple effect denitrfying agent composition in denitration in the stove reaction zone, de- in 800 DEG C of at a temperature of quadruple effect
Nitre agent composition is reacted with the NOx in flue gas, generates CO, CO2, N2, H2O, CaSO4 and Na SO4.
Wherein, denitrfying agent is the mixture of urea, ammonium chloride, ammonium formate and ammonium acetate；Catalyst is V2O5、TiO2And Co
Mixture, wherein V2O5To analyze pure, TiO2For DT-51 nanoscale, Ti/Co=0.05；Oxidant is K2MnO4And KMnO4's
Mixture；Surfactant is dioctyl succinate disulfonate acid；Sulphur-fixing agent is powdered Ca (OH)2, wherein Ca (OH)2Grain
Diameter is 0.1mm；Additive for sulfur capture is NaCO3, wherein NaCO3Partial size be 0.1mm；Gu sulphur auxiliary agent is the mixing of Na, Mg and Co
Object；In step 3, the partial size mesh of quadruple effect denitrfying agent composition is 20 mesh.
The invention has the following advantages that the formula of the invention is reasonable, by using Ca (OH)2As the sulphur-fixing agent of denitrfying agent,
Catalyst poisoning is avoided, cost is reduced, out of stock efficient products quality is improved and is effectively controlled, easy to operate, applicability is wide, fortune
At low cost, the Ca (OH) of row2Product CaO realizes crystal lattice rearrangement by additive for sulfur capture after decomposition, can significantly improve sulphur-fixing agent benefit
With rate；The present invention improves the ability of catalyst water resistant poisoning and sulfur poisoning-resistant, and pass through by mixing Co element in the catalyst
K is introduced in quadruple effect denitrfying agent composition2MnO4And KMnO4As oxide, fired coal combustion efficiency is improved, it is good in economic efficiency；This hair
It is bright that fired coal combustion characteristic is changed by the solid sulphur auxiliary agent of addition, so that coal-fired release SO2It is more uniform, improve the fixed sulphur of sulphur-fixing agent
Element effect.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of quadruple effect denitrfying agent composition, it is characterised in that: including (according to mass percent meter): denitrfying agent 25-45%, urging
Agent 10-15%, oxidant 10-12%, surfactant 5-8%, titanium dioxide 8-12%, sulphur-fixing agent 20-30%, solid sulphur addition
Agent 1-3% and solid sulphur auxiliary agent 1-2%.
2. a kind of quadruple effect denitrfying agent composition according to claim 1, it is characterised in that: the denitrfying agent is urea, chlorine
Change one or more of ammonium, ammonium formate and ammonium acetate.
3. a kind of quadruple effect denitrfying agent composition according to claim 1, it is characterised in that: the catalyst is V2O5、TiO2
With the mixture of Co, wherein V2O5To analyze pure, TiO2For DT-51 nanoscale, Ti/Co=0.05.
4. a kind of quadruple effect denitrfying agent composition according to claim 1, it is characterised in that: the oxidant is K2MnO4With
KMnO4Mixture.
5. a kind of quadruple effect denitrfying agent composition according to claim 1, it is characterised in that: the surfactant is two pungent
Base sodium sulfosuccinate, neopelex, sodium glycocholate, lauryl sodium sulfate, sulfated castor oil, alkylol acyl
One or more of amine.
6. a kind of quadruple effect denitrfying agent composition according to claim 1, it is characterised in that: the sulphur-fixing agent is powdered
Ca(OH)2, wherein Ca (OH)2Partial size≤0.2mm.
7. a kind of quadruple effect denitrfying agent composition according to claim 1, it is characterised in that: the additive for sulfur capture is
NaCO3, wherein NaCO3Partial size≤0.2mm.
8. a kind of quadruple effect denitrfying agent composition according to claim 1, it is characterised in that: the solid sulphur auxiliary agent be Na, Mg,
One or more of Al, Zn, Co, Ti.
9. a kind of method of denitration of such as described in any item quadruple effect denitrfying agent compositions of claim 1-8, which is characterized in that including
Following steps:
S1: weighing proportion, matches drawn material according to above-mentioned material；
S2: it is dry, denitrfying agent, catalyst, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and solid sulphur auxiliary agent are put into vacuum oven
In, control drying temperature is 70-90 DEG C, after continuous drying 1h, is taken out, mixing；
S3: grinding, by denitrfying agent, catalyst, oxidant, surfactant, titanium dioxide, sulphur-fixing agent, additive for sulfur capture and solid sulphur
Auxiliary agent is put into grinder, is ground, and is sieved, and mixing obtains quadruple effect denitrfying agent composition；
S4: denitration injects quadruple effect denitrfying agent composition in denitration in the stove reaction zone, in 500 DEG C~800 DEG C of at a temperature of quadruple effect
Denitrfying agent composition is reacted with the NOx in flue gas, generates CO, CO2, N2, H2O, CaSO4 and Na SO4.
10. a kind of method of denitration of quadruple effect denitrfying agent composition according to claim 9, it is characterised in that: in step 3,
The partial size mesh of the quadruple effect denitrfying agent composition is 20 mesh.
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| CN113828278A (en) * | 2021-10-29 | 2021-12-24 | 辽宁基伊能源科技有限公司 | Efficient denitration agent for waste gas treatment and preparation method thereof |
| CN114653195A (en) * | 2021-11-05 | 2022-06-24 | 首钢环境产业有限公司 | Efficient denitration agent for waste incineration flue gas and preparation method thereof |
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