CN103466571B - A kind of preparation of nitric acid method reducing greenhouse gas emission - Google Patents
A kind of preparation of nitric acid method reducing greenhouse gas emission Download PDFInfo
- Publication number
- CN103466571B CN103466571B CN201310410134.6A CN201310410134A CN103466571B CN 103466571 B CN103466571 B CN 103466571B CN 201310410134 A CN201310410134 A CN 201310410134A CN 103466571 B CN103466571 B CN 103466571B
- Authority
- CN
- China
- Prior art keywords
- nitric acid
- preparation
- temperature
- gas
- oxidation furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Catalysts (AREA)
Abstract
The present invention relates to a kind of preparation of nitric acid method reducing greenhouse gas emission, comprise the steps: to burn gas ammonia and air mixture Pt-Rh wire in double; two Nitric Acid Device oxidation furnaces on the net, generating nitric oxide gas, described nitric oxide gas and water react generation nitric acid; Wherein, described pair of Nitric Acid Device oxidation furnace temperature is 860 DEG C��890 DEG C. The method of the invention, under the premise not increasing equipment, improves the emission reduction efficiency of nitric acid plant greenhouse gases by Optimizing Process Parameters, can improve nitric acid yield simultaneously, increase economic efficiency.
Description
Technical field
The preparation method that the present invention relates to a kind of nitric acid, particularly relates to a kind of preparation of nitric acid method reducing greenhouse gas emission. Background technology
The nitric acid production process first step is that gas ammonia burns on the net with air mixture Pt-Rh wire in oxidation furnace, and the temperature of double; two Nitric Acid Device oxidation furnaces is 830 DEG C��890 DEG C, generates high-temperature oxydation nitrogen (NOx) gas, and dominant response formula is as follows:
4NH3+5O2��4NO+6H2O(1)
4NH3+3O2��2N2+6H2O(2)
4NH3+4O2��2N2O+6H2O(3)
The NO that formula (1) generates is the primary product of this step, is used for producing nitric acid, and formula (2) and (3) are with reaction, generate by-product N2��N2O and water. Under normal production conditions, by-product N2O can not generate nitric acid, and national environmental protection portion not greenhouse gases nitrous oxide (N to nitric acid plant discharge2O) restriction is made, therefore not to N in nitric acid normally produces2O discharge capacity is controlled, but is directly discharged into air, and this does not only make full use of raw material and causes oxidation furnace internal oxidition rate to reduce, and the N2O discharged also exacerbates Global Greenhouse Effect.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation of nitric acid method reducing greenhouse gas emission, described method is under the premise not increasing equipment, improved the emission reduction efficiency of nitric acid plant greenhouse gases by Optimizing Process Parameters, nitric acid yield can be improved simultaneously.
A kind of preparation of nitric acid method reducing greenhouse gas emission, comprises the steps:
Gas ammonia and air mixture Pt-Rh wire in double; two Nitric Acid Device oxidation furnaces being burnt on the net, generate nitric oxide gas, described nitric oxide gas and water react generation nitric acid; Wherein, described pair of Nitric Acid Device oxidation furnace temperature is 860 DEG C��890 DEG C.
The preparation of nitric acid method of minimizing greenhouse gas emission of the present invention, the temperature of wherein said pair of Nitric Acid Device oxidation furnace is 860 DEG C��870 DEG C, and oxidative pressure is 400kPa.
The preparation of nitric acid method of minimizing greenhouse gas emission of the present invention, the temperature of wherein said pair of Nitric Acid Device oxidation furnace is 861 DEG C��866 DEG C.
The preparation of nitric acid method difference from prior art of minimizing greenhouse gas emission of the present invention is in that:
The method of the invention, under the premise not increasing equipment, improves the emission reduction efficiency of nitric acid plant greenhouse gases by Optimizing Process Parameters, can improve nitric acid yield simultaneously, increase economic efficiency;Described pair of Nitric Acid Device oxidation furnace temperature can make the gas ammonia in oxidation furnace reach good conversion ratio when being 860 DEG C��890 DEG C, especially when temperature is 860 DEG C��870 DEG C, temperature is lower than 860 DEG C of gas ammonia low conversion rates, side reaction product increases, the conversion ratio of the too high gas ammonia of temperature can reduce, platinum rhodium net catalyst attrition can be caused simultaneously excessive, but also be susceptible to blast.
Accompanying drawing explanation
Fig. 1 is the curve chart that in the embodiment of the present invention 1, gas ammonia conversion ratio varies with temperature.
Detailed description of the invention
The embodiment 1 discussion to optimal temperature
According to the research of nitric acid production technique and repetition test at the scene, find to alleviate the pollution to environment of the nitric acid plant greenhouse gases by adjustment oxidation furnace temperature, and improve the conversion ratio of raw material gas ammonia in nitric acid oxidation furnace, see Fig. 1, wherein, curve a is oxidative pressure is the variation diagram in 100kPa situation, and curve b is oxidative pressure is the variation diagram in 400kPa situation. As can be seen from Fig. 1, in oxidation furnace, the conversion ratio of gas ammonia is relevant with temperature, the double; two Nitric Acid Device oxidation furnaces being 400kPa with oxidative pressure, reach before 890 DEG C in oxidation furnace temperature, the conversion ratio of ammonia raises with temperature and increases, having reached peak when 890 DEG C, can draw according to material balance, the by-product such as greenhouse gases N2O now produced is minimum.
According to this research, we operate usual range 830 DEG C��890 DEG C at nitric acid process and have studied, and carried out on-the-spot repetition test, and be that 860 DEG C��890 DEG C these temperature ranges are because by temperature optimization, in the oxidation furnace of 400kPa, higher than 890 DEG C, the conversion ratio of later ammonia can reduce temperature, platinum guaze catalyst attrition can be caused simultaneously excessive, and be susceptible to blast.
Through test of many times and from meter measurements it can be seen that nitric acid tail gas N2O concentration relevant with oxidation furnace temperature, oxidation furnace temperature is more high, and in tail gas, N2O concentration is more low, and vice versa.
Select a suitable oxidation furnace temperature, high ammonia conversion ratio can not only be carried, it is also possible to reduce side reaction and occur, reduce the discharge capacity of nitric acid plant greenhouse gases, improve the economic benefit of nitric acid production overall process simultaneously.
Embodiment 2
A kind of preparation of nitric acid method reducing greenhouse gas emission, comprises the steps:
Gas ammonia and air mixture Pt-Rh wire in double; two Nitric Acid Device oxidation furnaces being burnt on the net, generate nitric oxide gas, described nitric oxide gas and water react generation nitric acid; Wherein, the temperature of described pair of Nitric Acid Device oxidation furnace is 861 DEG C, and oxidative pressure is 100kPa or 400kPa, N in tail gas2The concentration of O is 1315ppm.
Embodiment 3
A kind of preparation of nitric acid method reducing greenhouse gas emission, comprises the steps:
Gas ammonia and air mixture Pt-Rh wire in double; two Nitric Acid Device oxidation furnaces being burnt on the net, generate nitric oxide gas, described nitric oxide gas and water react generation nitric acid; Wherein, the temperature of described pair of Nitric Acid Device oxidation furnace is 866 DEG C, and oxidative pressure is 100kPa or 400kPa, N in tail gas2The concentration of O is 1234ppm.
Embodiment 4
The temperature of described pair of Nitric Acid Device oxidation furnace is 870 DEG C, and other are with embodiment 1.
Embodiment 5
The temperature of described pair of Nitric Acid Device oxidation furnace is 890 DEG C, and other are with embodiment 1.
Embodiment 6
The temperature of described pair of Nitric Acid Device oxidation furnace is 860 DEG C, and other are with embodiment 1.
Embodiment described above is only that the preferred embodiment of the present invention is described; not the scope of the present invention is defined; under the premise designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention is determined.
Claims (3)
1. the preparation of nitric acid method reducing greenhouse gas emission, it is characterised in that: comprise the steps:
Gas ammonia and air mixture Pt-Rh wire in double; two Nitric Acid Device oxidation furnaces being burnt on the net, generate nitric oxide gas, described nitric oxide gas and water react generation nitric acid; Wherein, described pair of Nitric Acid Device oxidation furnace temperature is 860 DEG C��890 DEG C.
2. the preparation of nitric acid method of minimizing greenhouse gas emission according to claim 1, it is characterised in that: the temperature of described pair of Nitric Acid Device oxidation furnace is 860 DEG C��870 DEG C, and oxidative pressure is 400kPa.
3. the preparation of nitric acid method of minimizing greenhouse gas emission according to claim 2, it is characterised in that: the temperature of described pair of Nitric Acid Device oxidation furnace is 861 DEG C��866 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310410134.6A CN103466571B (en) | 2013-09-10 | 2013-09-10 | A kind of preparation of nitric acid method reducing greenhouse gas emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310410134.6A CN103466571B (en) | 2013-09-10 | 2013-09-10 | A kind of preparation of nitric acid method reducing greenhouse gas emission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103466571A CN103466571A (en) | 2013-12-25 |
| CN103466571B true CN103466571B (en) | 2016-06-08 |
Family
ID=49791662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310410134.6A Active CN103466571B (en) | 2013-09-10 | 2013-09-10 | A kind of preparation of nitric acid method reducing greenhouse gas emission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103466571B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1865130A (en) * | 2005-05-19 | 2006-11-22 | 西门子公司 | Nitric acid preparation method and device |
| CN2866462Y (en) * | 2005-12-28 | 2007-02-07 | 山东省化工规划设计院 | Ammonia oxidation furnace for dilute nitric acid production by double-pressing process |
-
2013
- 2013-09-10 CN CN201310410134.6A patent/CN103466571B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1865130A (en) * | 2005-05-19 | 2006-11-22 | 西门子公司 | Nitric acid preparation method and device |
| CN2866462Y (en) * | 2005-12-28 | 2007-02-07 | 山东省化工规划设计院 | Ammonia oxidation furnace for dilute nitric acid production by double-pressing process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103466571A (en) | 2013-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103816799B (en) | Improve denitrfying agent of SNCR denitration efficiency and preparation method thereof | |
| CN105032395B (en) | Zirconium doping cerium vanadate denitrating catalyst, preparation method and application | |
| MX2014012548A (en) | Methods and structures for reducing carbon oxides with non-ferrous catalysts. | |
| WO2016029582A1 (en) | Catalyst forming process for low-temperature flue gas denitration | |
| CN103885337B (en) | A kind of low nitrogen burning optimal N Ox discharge capacity control method based on cost calculation | |
| WO2011009437A3 (en) | Method and plant for the production of methanol | |
| CN109133103A (en) | A kind of iron-based oxygen carrier chemical chain ammonia method | |
| CN105170174A (en) | Nitriding carbon-based catalyst used for low temperature SCR denitration and preparation method thereof | |
| JP6134094B2 (en) | Nitrogen oxide removal method | |
| AU2014209841B2 (en) | An ammonia oxidation catalyst for the production of nitric acid based on metal doped yttrium ortho cobaltate | |
| CN103466571B (en) | A kind of preparation of nitric acid method reducing greenhouse gas emission | |
| CN202715356U (en) | Low temperature selective catalytic reduction (SCR) static bed flue gas denitration device of horizontal type heat recovery boiler | |
| CN110975920B (en) | Preparation method of nitrogen-doped grid macromolecule in-situ growth denitration sulfur-resistant catalyst | |
| CN102941098A (en) | Catalyst for methane synthesis through carbon dioxide hydrogenation and preparation method thereof | |
| ES2402841T3 (en) | Production of nitric oxide by oxidation of ammonia in the presence of a mixed metal oxide catalyst | |
| CN103450958A (en) | Denitration sludge coal slurry and method for denitration by using same | |
| CN110694640A (en) | Water-resistant sulfur-resistant denitration catalyst and preparation method thereof | |
| CN105363467A (en) | Titanium oxide-containing denitration catalyst and preparation method therefor | |
| CN112755997B (en) | Mn/Fe-MOF-loaded polyphenylene sulfide denitration sulfur-resistant filter material and preparation method thereof | |
| CN102658025A (en) | Low-temperature SCR (selective catalytic reduction) fixed bed fume denitration device for horizontal waste heat boiler | |
| CN105363469A (en) | Cerium dioxide-containing denitration catalyst and preparation method therefor | |
| CN105478135A (en) | Environmentally-friendly denitration catalyst and preparation method thereof | |
| CN111841614A (en) | Nitrogen-boron-codoped graphene composite denitration sulfur-resistant catalyst and preparation method thereof | |
| JP2014144424A5 (en) | ||
| CN111569651B (en) | Stable denitration method capable of widening SCR temperature window |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Lili Inventor before: Wang Lili Inventor before: Song Lei Inventor before: Chai Feng |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180529 Address after: 755000 B4 Road, Zhong Wei Industrial Park, Ningxia, the Ningxia Hui Autonomous Region, central Wei city. Patentee after: Ningxia run summer energy Chemical Co., Ltd. Address before: 232038 Anhui Huainan Tian Jia An District Quanshan Anhui Huaihua Limited by Share Ltd technology research and Development Center Patentee before: Anhui Huaihua Co., Ltd. |
|
| TR01 | Transfer of patent right |