CN103510978B - The Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment - Google Patents
The Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment Download PDFInfo
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- CN103510978B CN103510978B CN201310503994.4A CN201310503994A CN103510978B CN 103510978 B CN103510978 B CN 103510978B CN 201310503994 A CN201310503994 A CN 201310503994A CN 103510978 B CN103510978 B CN 103510978B
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Abstract
The present invention relates to a kind of Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment, belong to super low concentration methane oxidation technical field, comprise the equal fluidized bed of samming and catalytic oxidation bed arranged along airflow direction, wherein the equal fluidized bed of samming is piled up by honeycomb ceramic heat accumulator and is formed, along airflow direction, catalytic oxidation bed is made up of multiple catalytic oxidation layer, each catalytic oxidation layer is filled by honeycomb type catalyst and is formed, and the catalyst that multiple catalytic oxidation layer is filled reduces along the equal step of its activity component load quantity of airflow direction, specific area and hole density.The present invention has the advantages such as initiation temperature is low, oxidation efficiency is high, good operation stability.
Description
Technical field
The invention provides a kind of Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment, belong to super low concentration methane oxidation technical field.
Background technology
The main component of coal mine gas is methane, is a kind of utilizable Gas Energy Source.But in order to improve the security of coal production, usually adopt a large amount of ventilation to be discharged into direct after gas dilution among air.The direct discharge of this coal mine wind-lack gas causes the huge waste of limited non-renewable resources on the one hand, also atmosphere pollution and greenhouse effects are exacerbated on the other hand: be 21 times of carbon dioxide in the methane greenhouse effects of 100 years, methane accounts for 17% of global warming share, is only second to carbon dioxide.At present, China's coal-mine every year to the methane content of airborne release up to 20,000,000,000 Nm
3, wherein, ventilation air gas accounts for more than 150 hundred million Nm
3.Coal mine methane discharge capacity is huge, ventilation air gas concentration is very low, these two factors are its main bugbears utilized of restriction, effective Application way adopts hot counter flow oxidation technology (Thermal Flow Reversal Reactor at present, be called for short TFRR) and catalysis counter flow oxidation technology (Catalytic Flow Reversal, be called for short CFRR), adopt TFRR technical finesse coal mine wind-lack gas successfully to carry out business application at home and abroad, and CFRR technology not yet have the report at colliery scene process ventilation air gas demonstrating running.But consider from the angle of practical application, adopt TFRR technical finesse coal mine wind-lack gas to also exist to take up an area ceramic honey comb in relatively large, oxidation bed can occur after long-term use broken blocking, drag losses very large, automatically higher, the operating technology of controlling extent requirement require very high subject matter.Shandong Technology Univ discloses one " wind-insufficient preheating catalysis oxidizer of coal mine " in the patent of declaring (201110089144.5), weary wind enters preheater by heat temperature raising, carbon dioxide and water is become at catalytic oxidation bed internal oxidition, hot gas after oxidation enters air after preheater cooling, and this oxidator effectively overcomes the problem of counter flow oxidation technology.But the catalytic oxidation bed of this oxidator is formed by single packed catalyst, and it exists the problems such as initiation temperature is high, oxidation efficiency is low, operation stability is poor, needs to be further improved.
Summary of the invention
The object of the invention be to provide a kind of can overcome or avoid to exist in above-mentioned prior art shortcoming or deficiency, initiation temperature is low, oxidation efficiency is high, the Combined oxidation bed of the wind-insufficient preheating catalytic oxidizing equipment of good operation stability.Its technical scheme is:
A kind of Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment, comprise the equal fluidized bed of samming and catalytic oxidation bed arranged along airflow direction, wherein the equal fluidized bed of samming is piled up by honeycomb ceramic heat accumulator and is formed, it is characterized in that: along airflow direction, catalytic oxidation bed is made up of multiple catalytic oxidation layer, each catalytic oxidation layer is filled by honeycomb type catalyst and is formed, and the catalyst that multiple catalytic oxidation layer is filled reduces along the equal step of its activity component load quantity of airflow direction, specific area and hole density.
The Combined oxidation bed of described wind-insufficient preheating catalytic oxidizing equipment, catalytic oxidation layer comprises 3 ~ 5.
The Combined oxidation bed of described wind-insufficient preheating catalytic oxidizing equipment, leaves the gap of 2 ~ 5mm between adjacent catalyst oxide layer.
The Combined oxidation bed of described wind-insufficient preheating catalytic oxidizing equipment, the activity component load quantity difference 50 ~ 150g/m of the catalyst that adjacent catalyst oxide layer is filled
3, specific area difference 300 ~ 800m
2/ m
3, hole density difference 100 ~ 200 order.
Major advantage of the present invention and beneficial effect are:
1, the catalytic oxidation layer closing on the equal fluidized bed of samming have employed the honeycomb type catalyst that activity component load quantity is high, specific area large, hole density is high, because activity component load quantity is high, reaction activation center quantity is increased, improve methane oxidation rate, reduce the initiation temperature of coal mine methane, both decreased starting time and institute's energy requirement of device, and achieved again the low temperature stable operation of device, improve plant running security and stability.
2, because of methane oxidation heat release in weary wind, the gas flow rate in catalytic oxidation layer raises gradually, and the hole density step along each catalytic oxidation layer of airflow direction reduces, and negotiability strengthens, and effectively reduces gas flow resistance.
3, because of methane oxidation heat release in weary wind, after coal mine methane flows through the catalytic oxidation layer closing on the equal fluidized bed of samming, temperature rises, follow-up its catalyst of catalytic oxidation layer flow through only needs lower activity component load quantity can ensure the complete oxidation of methane, thus effectively reduces the cost of catalytic oxidation layer.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
In figure: 1, the equal fluidized bed 2 of samming, catalytic oxidation layer 3, gap
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.In the embodiment shown in fig. 1: comprise the equal fluidized bed 1 of samming and catalytic oxidation bed arranged along airflow direction, wherein the equal fluidized bed 1 of samming is piled up by honeycomb ceramic heat accumulator and is formed, along airflow direction, catalytic oxidation bed is made up of 3 catalytic oxidation layers 2, each catalytic oxidation layer 2 is filled by honeycomb type catalyst and is formed, the gap 3 of 3mm is left between adjacent catalyst oxide layer 2, and the catalyst of 3 catalytic oxidation layer 2 fillings is along its activity component load quantity of airflow direction, specific area and the equal step of hole density reduce, the activity component load quantity difference 100g/m of the catalyst that adjacent catalyst oxide layer 2 is filled
3, specific area difference 500m
2/ m
3, hole density difference 150 order.
Claims (3)
1. the Combined oxidation bed of a wind-insufficient preheating catalytic oxidizing equipment, comprise the equal fluidized bed of samming (1) and catalytic oxidation bed arranged along airflow direction, wherein the equal fluidized bed of samming (1) is piled up by honeycomb ceramic heat accumulator and is formed, catalytic oxidation bed is made up of multiple catalytic oxidation layer (2), each catalytic oxidation layer (2) is filled by honeycomb type catalyst and is formed, and the catalyst that multiple catalytic oxidation layer (2) is filled reduces along the equal step of its hole density of airflow direction, it is characterized in that: the catalyst that multiple catalytic oxidation layer (2) is filled reduces along its activity component load quantity of airflow direction and the equal step of specific area, the activity component load quantity difference 50 ~ 150g/m of the catalyst that adjacent catalyst oxide layer (2) is filled
3, specific area difference 300 ~ 800m
2/ m
3, hole density difference 100 ~ 200 order.
2. the Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment as claimed in claim 1, is characterized in that: catalytic oxidation layer (2) comprises 3 ~ 5.
3. the Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment as claimed in claim 1, is characterized in that: the gap (3) leaving 2 ~ 5mm between adjacent catalyst oxide layer (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503994.4A CN103510978B (en) | 2013-10-23 | 2013-10-23 | The Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201310503994.4A CN103510978B (en) | 2013-10-23 | 2013-10-23 | The Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103510978A CN103510978A (en) | 2014-01-15 |
| CN103510978B true CN103510978B (en) | 2015-10-14 |
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| CN201310503994.4A Active CN103510978B (en) | 2013-10-23 | 2013-10-23 | The Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268312A (en) * | 2016-08-30 | 2017-01-04 | 中国科学院山西煤炭化学研究所 | A kind of oxidation bed of ventilation air gas counter-current catalytic oxidation unit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9000528D0 (en) * | 1990-01-10 | 1990-03-14 | Shell Int Research | Fixed bed reactor |
| CN101116822A (en) * | 2007-08-30 | 2008-02-06 | 汉能科技有限公司 | Non-uniform combustion catalyst and method for preparing the same |
| CN101761354B (en) * | 2009-12-29 | 2012-07-18 | 山东理工大学 | Vertical structure oxidation bed of mine ventilation air methane gas thermal oxidation device |
| CN202113840U (en) * | 2011-04-11 | 2012-01-18 | 山东理工大学 | Wind-insufficient preheating catalysis oxidizer of coal mine |
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2013
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