CN103182243A - Preparation and application method of smoke denitrifying agent - Google Patents
Preparation and application method of smoke denitrifying agent Download PDFInfo
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- CN103182243A CN103182243A CN2013100967087A CN201310096708A CN103182243A CN 103182243 A CN103182243 A CN 103182243A CN 2013100967087 A CN2013100967087 A CN 2013100967087A CN 201310096708 A CN201310096708 A CN 201310096708A CN 103182243 A CN103182243 A CN 103182243A
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Abstract
The invention discloses a preparation method of a smoke denitrifying agent with high denitrifying rate. The method comprises the following steps: firstly, preparing the denitrifying agent carrier, adding activated carbon to attapulgite powder, setting the amount of the added activated carbon to be 10-30 % of the amount of the attapulgite powder, adding appropriate amount of acetum after uniform mixing, then mixing to obtain paste, putting the paste in a forming machine to form, drying for 3-5 hours at the temperature of 100-105 DEG C in an oven, and obtaining the denitrifying agent carrier; and secondly, putting the denitrifying agent carrier into NH4VO3 solution with the concentration of 0.5-0.8 mol/L, performing isovolumetric impregnation for 2-6 hours, drying for 2-3 hours at the temperature of 60 DEG C, then drying for 5-6 hours at the temperature of 100-105 DEG C, and roasting for 2-5 hours at the temperature of 200-400 DEG C under nitrogen protection to obtain the denitrifying agent.
Description
Technical field
The present invention relates to a kind of preparation and application process of smoke denitrifier.
Background technology
Nitrogen oxide (NOx) is main atmosphere pollution, the destruction that can cause acid rain, photochemical pollution, greenhouse effects and ozone layer.One of main source of nitrogen oxide (NOx) is the flue gas that fired coal combustion discharges, and contains a large amount of NO, NO
2With minor N 2O, secondly be the tail gas of motor vehicle emission.Along with popularizing of China's development of electric power industry and private savings automobile, the total emission volumn of nitrogen oxide (NOx) is increasing fast, the pollution of control and improvement nitrogen oxide (NOx) is extremely urgent, and wherein the denitration of coal-fired flue-gas is one of important measures of control nitrogen oxide (NOx).
The technology of industry coal-boiler denitrating flue gas mainly contains selective-catalytic-reduction denitrified (SCR), SNCR denitration (SNCR), liquid absorption method, plasma-activated method and absorption method etc. at present.Wherein, with NH
3For the SCR technology of reducing agent is the effective method of present denitrating flue gas, also be use in the world at most, method that technology is the most ripe.The key that the SCR technological achievement is used is to select appropriate catalyst, and the kind of catalyst, form, life-span and reaction temperature all influence the efficient of SCR method denitration.What the application at present of SCR catalyst was more is metal oxide, its reaction temperature mostly is between 320～400 ℃, from efficient, economical and be easy on the angle of boiler coupling, in 120～200 ℃ of scopes denitration more superior, so the research of low-temperature SCR catalyst more and more comes into one's own.
In addition; Concave-convex clay rod is a kind of natural aluminium magensium silicate mineral of cheapness; have unique fibrous crystalline structure and superior physical and chemical performances such as colloid, absorption, catalysis and filling, all have in a plurality of fields such as environmental protection, chemical industry, light industry, agricultural, building materials extremely widely and use.Concave-convex clay rod has big specific area and adsorption activity preferably, the Mg in its structure
2+, Al
3+Being easy to by other metal ion exchanged, forming active sites, is a kind of good adsorbent and carrier.Common desulphurization denitration adsorbent such as Concave-convex clay rod and active carbon, zeolite etc. is compared, the specific area of Concave-convex clay rod is less, dispersiveness is also relatively poor, therefore is necessary the Concave-convex clay rod carrier is improved, and improves corresponding catalyst to the denitrating flue gas effect.
Up to the present the application study state in gas denitrifying technology does not appear in the newspapers as yet with attapulgite clay and active carbon composite load reactive metal oxides vanadic anhydride.
Summary of the invention
Technical problem to be solved by this invention is: preparation and application process that the high smoke denitrifier of a kind of denitration rate is provided.
In order to solve the problems of the technologies described above; the technical solution used in the present invention is: the preparation method of smoke denitrifier; comprise the steps: the preparation of denitrfying agent carrier: in the Concave-convex clay rod powder, add active carbon; the active carbon addition is Concave-convex clay rod 10-30%; mix the back an amount of acetum of adding and stir into pasty state; put into the make-up machine moulding; in baking oven in 100-105 ℃ of dry 3-5 hour; under nitrogen protection 300-500 ℃ roasting 1-4 hour; make the denitrfying agent carrier, the denitrfying agent carrier is put into the NH that concentration is 0.5-0.8mol/L
4VO
3In the solution, adopt incipient impregnation after 2-6 hour, at 60 ℃ of dry 2-3 hours, then after 100-105 ℃ of dry 5-6 hour, under nitrogen protection under 200-400 ℃ of condition roasting 2-5 hour, namely get denitrfying agent.
In order to solve the problems of the technologies described above better, the further technical scheme that the present invention adopts is: described active carbon is that rice husk or stalk prepare.
In order to solve the problems of the technologies described above better, the further technical scheme that the present invention adopts is: utilize the preparation method of smoke denitrifier to obtain the application process of denitrfying agent, comprise the steps: denitrfying agent is packed in fixed bed or the moving-burden bed reactor, reaction temperature control is at 120-300 ℃, feed the normal pressure flue gas, flue gas flow is 500mL/min, and the denitration rate is 70-90%.
Advantage of the present invention is: the denitrfying agent that adopts this preparation method to make is used for denitrating flue gas, denitration rate height, the denitration rate reaches high 70-90%, denitrfying agent can directly utilize the active carbon of Concave-convex clay rod and agricultural wastes rice husk or stalk preparation as feedstock production, the denitrfying agent producing cost is low, and denitrfying agent is active high, stable performance, can use repeatedly, not cause secondary pollution.
The specific embodiment
Describe particular content of the present invention in detail below in conjunction with specific embodiment.
Embodiment 1:
Be that to add specific area in the Concave-convex clay rod powder of 60 μ m be 700m at particle diameter
2The active carbon powder of the rice husk preparation of/g; addition is the 12%(mass percent of Concave-convex clay rod); add aqueous acetic acid and evenly stir into pasty state; extruded moulding; in baking oven in 100 ℃ of dryings 3 hours; 300 ℃ of roastings are 2 hours under nitrogen protection, make the denitrfying agent carrier, the denitrfying agent carrier of making put into the NH of 0.5mol/L
4VO
3In the solution, adopt incipient impregnation after 2 hours, 60 ℃ of dryings 3 hours, 100 ℃ of dryings 5 hours, 200 ℃ of roastings made desulfurizing agent in 3 hours, milled then, the 40-60 order sieves, denitrfying agent 1.0 gram is packed in the fixed bed reactors, is warming up to 200 ℃ of ventilatory responses, simulated flue gas consist of NH
3500ppm, NO
2500ppm, O
25%, surplus is N
2, gas flow 500mL/min, the denitration rate is 74%.
Embodiment 2:
Be that to add specific area in the Concave-convex clay rod powder of 60 μ m be 700m at particle diameter
2The active carbon powder of the rice husk preparation of/g; addition is the 30%(mass percent of Concave-convex clay rod); add water and evenly stir into pasty state; extruded moulding; in baking oven in 105 ℃ of dryings 4 hours; 350 ℃ of roastings are 3 hours under nitrogen protection, make the denitrfying agent carrier, the denitrfying agent carrier of making put into the NH of 0.6mol/L
4VO
3In the solution; adopt incipient impregnation after 3 hours; 60 ℃ of dryings 2 hours; 105 ℃ of dryings after 5 hours, 300 ℃ of roastings made desulfurizing agent in 3 hours under nitrogen protection, milled then; the 40-60 order sieves; denitrfying agent 1.0 gram is packed in the fixed bed reactors, is warming up to 250 ℃ of ventilatory responses, simulated flue gas consist of NH
3500ppm, NO
2500ppm, O
25%, surplus is N
2, gas flow 500mL/min, the denitration rate is 70%.
Embodiment 3:
Be that to add specific area in the Concave-convex clay rod powder of 60 μ m be 700m at particle diameter
2The active carbon powder of the rice husk preparation of/g; addition is the 20%(mass percent of Concave-convex clay rod); add aqueous acetic acid and evenly stir into pasty state; extruded moulding; in baking oven in 100 ℃ of dryings 2 hours; 400 ℃ of roastings are 4 hours under nitrogen protection, make the denitrfying agent carrier, the denitrfying agent carrier of making put into the NH of 0.8mol/L
4VO
3In the solution; adopt incipient impregnation after 5 hours; 60 ℃ of dryings 2 hours; 100 ℃ of dryings after 6 hours, 400 ℃ of roastings made desulfurizing agent in 2 hours under nitrogen protection, milled then; the 40-60 order sieves; denitrfying agent 1.0 gram is packed in the fixed bed reactors, is warming up to 280 ℃ of ventilatory responses, simulated flue gas consist of NH
3500ppm, NO
2500ppm, O
25%, surplus is N
2, gas flow 500mL/min, the denitration rate is 90%.
Claims (3)
1. the preparation method of smoke denitrifier; it is characterized in that: comprise the steps: the preparation of denitrfying agent carrier: in the Concave-convex clay rod powder, add active carbon; the active carbon addition is Concave-convex clay rod 10-30%; mix the back an amount of acetum of adding and stir into pasty state; put into the make-up machine moulding; in baking oven in 100-105 ℃ of dry 3-5 hour; under nitrogen protection 300-500 ℃ roasting 1-4 hour; make the denitrfying agent carrier, the denitrfying agent carrier is put into the NH that concentration is 0.5-0.8mol/L
4VO
3In the solution, adopt incipient impregnation after 2-6 hour, at 60 ℃ of dry 2-3 hours, then after 100-105 ℃ of dry 5-6 hour, under nitrogen protection under 200-400 ℃ of condition roasting 2-5 hour, namely get denitrfying agent.
2. according to preparation and the application process of the described smoke denitrifier of claim 1, it is characterized in that: described active carbon is that rice husk or stalk prepare.
3. utilize the preparation method of claim 1 or 2 described smoke denitrifiers to obtain the application process of denitrfying agent, it is characterized in that: comprise the steps: denitrfying agent is packed in fixed bed or the moving-burden bed reactor, reaction temperature control is at 120-300 ℃, feed the normal pressure flue gas, flue gas flow is 500mL/min, and the denitration rate is 70-90%.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524005A (en) * | 2015-12-21 | 2016-04-27 | 安徽工业大学 | Method for recycling cyanuric acid from cyanuric acid waste residue |
| CN105999951A (en) * | 2016-07-01 | 2016-10-12 | 呼伦贝尔东北阜丰生物科技有限公司 | Treatment method for cooling, deodorization, desulfurization and denitrification of slurry-spraying granulation tail gas |
| CN106345269A (en) * | 2016-10-24 | 2017-01-25 | 马鞍山科宇环境工程有限公司 | Coal denitration agent |
| CN106732751A (en) * | 2016-12-08 | 2017-05-31 | 盐城工学院 | A kind of desulphurization denitration catalyst and preparation method thereof and application method |
| CN106732525A (en) * | 2016-12-08 | 2017-05-31 | 盐城工学院 | A kind of denitrating catalyst and preparation method thereof and application method |
| CN110694454A (en) * | 2019-10-28 | 2020-01-17 | 淄博东一环保科技有限公司 | Production process of environment-friendly flue gas denitration agent |
| CN111530280A (en) * | 2020-05-09 | 2020-08-14 | 铭牌精工机械(山东)有限公司 | Desulfurization and denitrification environment-friendly treatment method |
| CN114558449A (en) * | 2022-03-02 | 2022-05-31 | 通化鑫鸿新材料有限公司 | Preparation method and application of flue gas denitration agent |
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| JPH08266870A (en) * | 1995-03-30 | 1996-10-15 | Mitsubishi Heavy Ind Ltd | Denitrifying method |
| CN1597094A (en) * | 2004-08-02 | 2005-03-23 | 中国科学院山西煤炭化学研究所 | Honey comb shaped active carbon base catalyst used for sulfur removal and nitrate removal and its preparation and application |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524005A (en) * | 2015-12-21 | 2016-04-27 | 安徽工业大学 | Method for recycling cyanuric acid from cyanuric acid waste residue |
| CN105524005B (en) * | 2015-12-21 | 2019-01-29 | 安徽工业大学 | A method of recycling cyanuric acid from cyanuric acid waste residue |
| CN105999951A (en) * | 2016-07-01 | 2016-10-12 | 呼伦贝尔东北阜丰生物科技有限公司 | Treatment method for cooling, deodorization, desulfurization and denitrification of slurry-spraying granulation tail gas |
| CN105999951B (en) * | 2016-07-01 | 2017-12-01 | 呼伦贝尔东北阜丰生物科技有限公司 | A kind of processing method of slurry-spraying pelletizing tail gas cooling and deodorizing desulphurization denitration |
| CN106345269A (en) * | 2016-10-24 | 2017-01-25 | 马鞍山科宇环境工程有限公司 | Coal denitration agent |
| CN106732751A (en) * | 2016-12-08 | 2017-05-31 | 盐城工学院 | A kind of desulphurization denitration catalyst and preparation method thereof and application method |
| CN106732525A (en) * | 2016-12-08 | 2017-05-31 | 盐城工学院 | A kind of denitrating catalyst and preparation method thereof and application method |
| CN106732751B (en) * | 2016-12-08 | 2019-12-17 | 盐城工学院 | Desulfurization and denitrification catalyst, and preparation method and use method thereof |
| CN110694454A (en) * | 2019-10-28 | 2020-01-17 | 淄博东一环保科技有限公司 | Production process of environment-friendly flue gas denitration agent |
| CN111530280A (en) * | 2020-05-09 | 2020-08-14 | 铭牌精工机械(山东)有限公司 | Desulfurization and denitrification environment-friendly treatment method |
| CN114558449A (en) * | 2022-03-02 | 2022-05-31 | 通化鑫鸿新材料有限公司 | Preparation method and application of flue gas denitration agent |
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Application publication date: 20130703 |