CN101411966A - Apparatus and method of absorption, use, and pyogenic decomposition of high concentration nitrous oxides exhaust gas - Google Patents
Apparatus and method of absorption, use, and pyogenic decomposition of high concentration nitrous oxides exhaust gas Download PDFInfo
- Publication number
- CN101411966A CN101411966A CNA2008101556847A CN200810155684A CN101411966A CN 101411966 A CN101411966 A CN 101411966A CN A2008101556847 A CNA2008101556847 A CN A2008101556847A CN 200810155684 A CN200810155684 A CN 200810155684A CN 101411966 A CN101411966 A CN 101411966A
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- China
- Prior art keywords
- exhaust gas
- nitrous oxides
- high concentration
- absorption tower
- temperature decomposition
- Prior art date
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Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 46
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 14
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 title claims description 35
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 20
- 239000002253 acid Substances 0.000 claims abstract description 11
- 239000007921 spray Substances 0.000 claims description 10
- 238000000197 pyrolysis Methods 0.000 claims description 7
- 229920002313 fluoropolymer Polymers 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 22
- 239000007789 gas Substances 0.000 abstract description 22
- 239000002912 waste gas Substances 0.000 abstract description 10
- 239000000571 coke Substances 0.000 abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 2
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 239000005431 greenhouse gas Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 13
- 230000008676 import Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The invention discloses a device for absorption utilization and high-temperature decomposition of high concentration nitrogen oxide waste gases and a method thereof. The device comprises an absorption device and a high-temperature decomposition device, the absorption device comprises an absorption tower and an acid pump, the upper part and the lower part of the absorption tower are connected with the acid pump by pipes, the absorption tower is also provided with a nitrogen oxide waste gas inlet and a nitrogen oxide waste gas outlet, and the gas outlet is connected with a gas inlet of the high-temperature decomposition device; and, the high concentration nitrogen oxide waste gas enters the absorption tower to be leached by dilute nitric acid, and enters the high-temperature decomposition device for high-temperature decomposition. The device has the advantages that: the nitrogen oxide waste gas is effectively utilized, part of the nitrogen oxide waste gases is converted to a nitric acid to be reutilized, and simultaneously, the consumption of energy and coke in the high-temperature decomposition process is reduced, the emission of carbon dioxide greenhouse gas is reduced, and the requirements on the present recycling economy are met.
Description
Technical field
The high concentration nitrous oxides exhaust gas that the present invention relates to produce in a kind of nitric acid production and the use absorbs the apparatus and method with pyrolytic.
Background technology
The patent No. is that 02263020.1 Chinese utility model patent discloses a kind of nitrous oxides exhaust gas treatment reactor, this device includes reacting furnace-e/or, reacting furnace-e/or is divided into top, middle part, bottom, on the top on top is the nitrous oxides exhaust gas outlet, the middle part is a reaction zone, in reaction zone, be provided with coke, upper side at the middle part is provided with the coke import, between middle part and bottom, be provided with the separation fire bars, lower end at fire bars is provided with air intake duct, lower side at reacting furnace-e/or is provided with the nitrous oxides exhaust gas import, is provided with slag notch in the bottom of reacting furnace-e/or.The chemical principle of this utility model utilization is: 2NO+C=N
2+ CO
2, 2NO
2+ 2C=N
2+ 2CO
2, the carbon of participating in chemical reaction is coke.The catalytic way of chemical reaction is a thermocatalytic.Chemical reaction temperature is controlled at 600-950 ℃.The weak point of this patented technology is, the processing of nitrous oxides exhaust gas is only considered that be harmless gas by chemical reaction with the harmful exhaust decomposition and inversion, nitrous oxides exhaust gas is not effectively utilized, turn waste into wealth, do not meet the requirement of current recycling economy; Since unclear to bond energy principle assurance in the chemical reaction, cause the statement of chemical reaction control temperature mistake to occur, in 600-950 ℃ of scope, 2NO+C=N
2+ CO
2, 2NO
2+ 2C=N
2+ 2CO
2Two chemical reactions might carry out slowly or not reaction, also just do not reach the purpose of decomposing nitrogen oxide waste gas, still can cause serious environmental to pollute, and that is to say that this patent just can't realize its goal of the invention at all.
Summary of the invention:
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of high concentration nitrous oxides exhaust gas to absorb and high temperature decomposition device and method.
Technical scheme of the present invention is as follows: a kind of high concentration nitrous oxides exhaust gas absorbs and high temperature decomposition device, comprise absorption plant and high temperature decomposition device, described absorption plant comprises absorption tower, sour pump, the upper and lower on described absorption tower is connected with described sour pump by pipeline, described absorption tower also is provided with nitrous oxides exhaust gas air inlet and exhaust outlet, and described exhaust outlet links to each other with described high temperature decomposition device air inlet.
The top on described absorption tower is connected with described sour pump by pipeline with the bottom.
Top of chamber is provided with spray equipment in the described absorption tower.
Described sour pump is the fluoroplastics pump.
Described absorption tower is two, and wherein the exhaust outlet on first absorption tower is connected with the air inlet on second absorption tower.
Described absorption tower inner chamber is provided with spray baffle plate with holes.
Described spray baffle number is 4.
Be provided with acid storage tank before described sour pump inlet place.
A kind of high concentration nitrous oxides exhaust gas absorbs and pyrolysis method, high concentration nitrous oxides exhaust gas is fed in the absorption tower feed the high temperature decomposition device pyrolytic again after rare nitric acid drip washing.
Described rare nitric acid lessivation is 2 times.
Described rare nitric acid recycles through sour pump pump pressure.
The decomposition temperature of described high temperature decomposition device is 850 ℃-1000 ℃.
The beneficial effect that the present invention compared with prior art has is: the processing of nitrous oxides exhaust gas is considered that not only be harmless gas by chemical reaction with the harmful exhaust decomposition and inversion, also nitrous oxides exhaust gas is effectively utilized, making its part change nitric acid into reuses, turn waste into wealth, reduce the consumption and the discharge of carbon dioxide greenhouse gas of the energy in the pyrolysis process, coke simultaneously, meet the requirement of current recycling economy; Redefined decomposition temperature, made 2NO+C=N
2+ CO
2, 2NO
2+ 2C=N
2+ 2CO
2Two chemical reactions carry out smoothly, and the waste gas complete decomposition reaches environmental requirement.
Description of drawings:
Fig. 1 is apparatus of the present invention structural representation.
The specific embodiment:
Below in conjunction with the drawings and specific embodiments the present invention is described in detail.
Embodiment 1: as shown in Figure 1, a kind of high concentration nitrous oxides exhaust gas absorbs and high temperature decomposition device, comprise absorption plant and high temperature decomposition device 1, described absorption plant comprises absorption tower 2,5, sour pump 8, the top on described absorption tower 2,5 is connected with described sour pump 8 by pipeline 6,10 with the bottom, absorption tower 2,5, pipeline 6,10 is made for the 1Cr18Ni9Ti alloy material.Acid pump 8 is the fluoroplastics pump, be provided with acid storage tank 9 before acid pump 8 import departments, described absorption tower 2,5 also is provided with nitrous oxides exhaust gas air inlet 7 and exhaust outlet 12, wherein the exhaust outlet on first absorption tower 5 is connected by pipeline 4 with the air inlet on second absorption tower 2, and described exhaust outlet 12 links to each other with described high temperature decomposition device 1 air inlet.Top of chamber is provided with spray equipment 3 in the absorption tower 2,5, and absorption tower 2,5 inner chambers are provided with four spray baffle plates 11 with holes, and spray baffle plate 11 is the stainless steel helices column plate.
A kind of high concentration nitrous oxides exhaust gas absorbs and pyrolysis method, contain rare nitric acid in the acid storage tank 9, acid pump 8 is pumped to absorption tower 2,5 top sprays with rare nitric acid, high concentration nitrous oxides exhaust gas fed in the absorption tower 2,5 feed high temperature decomposition device 1 pyrolytic again after rare nitric acid drip washing, the decomposition temperature of high temperature decomposition device is 850 ℃.Rare nitric acid recycles through sour pump 8 pump pressures, after nitric acid reaches industry use desired concn, opens acid storage tank 9 and emits the use of part nitric acid, adds clear water to acid storage tank 9 simultaneously.Utilize repeatedly absorption of N O of rare nitric acid
2, more effective than the water absorption, make NO in the waste gas
2Be reduced to below 5%, most of NO in the waste gas
2Be used, following chemical reaction: 3NO takes place in its process
2+ H
2O=2HNO
3+ NO, NO+O
2=2NO
2Pyrolytic nitrogen oxide chemical principle is: the bond energy of N=0 key is 607kj/mol, and the bond energy of C=0 key is 798.9kj/mol, and under the high-temperature catalytic condition, C can be from NO
2Seize 0 in the molecule, and the N that dissociates
2, make NO
2Become harmless N
2And CO
2
Embodiment 2: its difference from Example 1 is that rare nitric acid lessivation is 1 time, and the decomposition temperature of high temperature decomposition device is 900 ℃.
Embodiment 3: its difference from Example 1 is that rare nitric acid lessivation is 3 times, and the decomposition temperature of high temperature decomposition device is 950 ℃.
Embodiment 4: its difference from Example 1 is that rare nitric acid lessivation is 4 times, and the decomposition temperature of high temperature decomposition device is 1000 ℃.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the protection domain of requirement of the present invention.
Claims (12)
1. a high concentration nitrous oxides exhaust gas absorbs and high temperature decomposition device, comprise absorption plant and high temperature decomposition device, it is characterized in that described absorption plant comprises absorption tower, sour pump, the upper and lower on described absorption tower is connected with described sour pump by pipeline, described absorption tower also is provided with nitrous oxides exhaust gas air inlet and exhaust outlet, and described exhaust outlet links to each other with described high temperature decomposition device air inlet.
2. a kind of high concentration nitrous oxides exhaust gas according to claim 1 absorbs and high temperature decomposition device, it is characterized in that the top on described absorption tower is connected with described sour pump by pipeline with the bottom.
3. a kind of high concentration nitrous oxides exhaust gas according to claim 1 absorbs and high temperature decomposition device, it is characterized in that top of chamber is provided with spray equipment in the described absorption tower.
4. a kind of high concentration nitrous oxides exhaust gas according to claim 1 absorbs and high temperature decomposition device, it is characterized in that described sour pump is the fluoroplastics pump.
5. a kind of high concentration nitrous oxides exhaust gas according to claim 1 absorbs and high temperature decomposition device, it is characterized in that described absorption tower is two, and wherein the exhaust outlet on first absorption tower is connected with the air inlet on second absorption tower.
6. a kind of high concentration nitrous oxides exhaust gas according to claim 1 absorbs and high temperature decomposition device, it is characterized in that described absorption tower inner chamber is provided with spray baffle plate with holes.
7. a kind of high concentration nitrous oxides exhaust gas according to claim 6 absorbs and high temperature decomposition device, it is characterized in that described spray baffle number is 4.
8. a kind of high concentration nitrous oxides exhaust gas according to claim 1 absorbs and high temperature decomposition device, it is characterized in that being provided with acid storage tank before described sour pump inlet place.
9. a high concentration nitrous oxides exhaust gas absorbs and pyrolysis method, it is characterized in that high concentration nitrous oxides exhaust gas fed in the absorption tower feeding the high temperature decomposition device pyrolytic again after rare nitric acid drip washing.
10. a kind of high concentration nitrous oxides exhaust gas according to claim 9 absorbs and pyrolysis method, it is characterized in that described rare nitric acid lessivation is 2 times.
11. a kind of high concentration nitrous oxides exhaust gas according to claim 9 absorbs and pyrolysis method, it is characterized in that described rare nitric acid recycles through sour pump pump pressure.
12. a kind of high concentration nitrous oxides exhaust gas according to claim 9 absorbs and pyrolysis method, the decomposition temperature that it is characterized in that described high temperature decomposition device is 850 ℃-1000 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101556847A CN101411966A (en) | 2008-10-29 | 2008-10-29 | Apparatus and method of absorption, use, and pyogenic decomposition of high concentration nitrous oxides exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101556847A CN101411966A (en) | 2008-10-29 | 2008-10-29 | Apparatus and method of absorption, use, and pyogenic decomposition of high concentration nitrous oxides exhaust gas |
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| Publication Number | Publication Date |
|---|---|
| CN101411966A true CN101411966A (en) | 2009-04-22 |
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ID=40592831
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101556847A Pending CN101411966A (en) | 2008-10-29 | 2008-10-29 | Apparatus and method of absorption, use, and pyogenic decomposition of high concentration nitrous oxides exhaust gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103566739A (en) * | 2013-10-24 | 2014-02-12 | 南京大学 | Method for resource recovery of nitrogen oxides (NOx) in nitric acid industrial waste gas |
| CN103801173A (en) * | 2012-11-08 | 2014-05-21 | 中国石油化工股份有限公司 | Processing method of NO<x> exhaust gas in copper-zinc catalyst preparation processes |
-
2008
- 2008-10-29 CN CNA2008101556847A patent/CN101411966A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801173A (en) * | 2012-11-08 | 2014-05-21 | 中国石油化工股份有限公司 | Processing method of NO<x> exhaust gas in copper-zinc catalyst preparation processes |
| CN103566739A (en) * | 2013-10-24 | 2014-02-12 | 南京大学 | Method for resource recovery of nitrogen oxides (NOx) in nitric acid industrial waste gas |
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Open date: 20090422 |