CN103510978A - Combined oxidation bed for coal mine ventilation air preheating catalytic oxidation device - Google Patents
Combined oxidation bed for coal mine ventilation air preheating catalytic oxidation device Download PDFInfo
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- CN103510978A CN103510978A CN201310503994.4A CN201310503994A CN103510978A CN 103510978 A CN103510978 A CN 103510978A CN 201310503994 A CN201310503994 A CN 201310503994A CN 103510978 A CN103510978 A CN 103510978A
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Abstract
The invention relates to a combined oxidation bed for a coal mine ventilation air preheating catalytic oxidation device, and belongs to the technical field of oxidation of superlow density methane. The combined oxidation bed comprises a uniform-temperature and flow-equalizing bed and a catalytic oxidation bed, wherein the uniform-temperature and flow-equalizing bed is formed by stacking honeycomb ceramic heat retainers, in the airflow direction, the catalytic oxidation bed is composed of a plurality of catalytic oxidation layers, each catalytic oxidation layer is formed by filling a honeycomb-type catalyst, and the active component loading amount, the specific surface area and the hole density of the filled catalyst of the catalytic oxidation layers are reduced gradually. The combined oxidation bed has the advantages of low initiation temperature, high oxidation efficiency, good operational stability and the like.
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 safety of coal production, a large amount of ventilations of employing are directly discharged among atmosphere after gas is diluted conventionally.The direct discharge of this coal mine wind-lack gas has caused the huge waste of limited non-renewable resources on the one hand, also atmosphere pollution and greenhouse effect have been aggravated on the other hand: in the methane greenhouse effect of 100 years, be 21 times of carbon dioxide, 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 value is huge, ventilation air gas concentration is very low, these two factors are main bugbears of its utilization of restriction, effectively utilizing at present method is to adopt hot counter flow oxidation technology (Thermal Flow Reversal Reactor, 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 of processing ventilation air gas demonstrating running at colliery scene.But from the angle of practical application, consider, adopt TFRR technical finesse coal mine wind-lack gas to exist to take up an area in relatively large, oxidation bed that ceramic honey comb can occur brokenly to stop up after long-term use, drag losses very greatly, control degree automatically has relatively high expectations, operating technology requires very high subject matter.Shandong Technology Univ discloses a kind of " wind-insufficient preheating catalysis oxidizer of coal mine " in the patent of declaring (201110089144.5), weary wind enters preheater and is heated intensification, in catalytic oxidation bed, be oxidized to carbon dioxide and water, hot gas after oxidation enters atmosphere after preheater cooling, and this oxidator has effectively overcome the problem of counter flow oxidation technology.But the catalytic oxidation bed of this oxidator is filled and formed by single catalyzer, there is the problems such as initiation temperature is high, oxidation efficiency is low, operation stability is poor in it, needs to be further improved.
Summary of the invention
The object of the invention is to provide a kind of shortcoming or deficiency that can overcome or avoid to exist in above-mentioned prior art, 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 the catalytic oxidation bed along airflow direction, arranged, wherein the equal fluidized bed of samming is piled up and is formed by honeycomb ceramic heat accumulator, it is characterized in that: along airflow direction, catalytic oxidation bed is comprised of a plurality of catalytic oxidation layers, each catalytic oxidation layer is filled and is formed by honeycomb type catalyst, and the catalyzer that a plurality of 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 2～5mm gaps between adjacent catalytic oxidation layer.
The Combined oxidation bed of described wind-insufficient preheating catalytic oxidizing equipment, the activity component load quantity of the catalyzer that adjacent catalytic oxidation layer is filled differs 50～150g/m
3, specific area differs 300～800m
2/ m
3, hole density differs 100～200 orders.
Major advantage of the present invention and beneficial effect are:
1, the catalytic oxidation layer that closes on the equal fluidized bed of samming has adopted that activity component load quantity is high, the high honeycomb type catalyst of specific area great, hole density, because activity component load quantity is high, reaction activation center quantity is increased, improved methane oxidation rate, reduced the initiation temperature of coal mine methane, both reduce starting time and institute's energy requirement of device, realized again the low temperature stable operation of device, improved device security of operation stability.
2, because of methane oxidation heat release in weary wind, the gas flow rate in catalytic oxidation layer raises gradually, along airflow direction each catalytic oxidation Ceng hole density step, 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 that closes on the equal fluidized bed of samming, temperature rises, its catalyzer of catalytic oxidation layer that subsequent flows is crossed only needs lower activity component load quantity can guarantee the complete oxidation of methane, thereby 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
The specific embodiment
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 the catalytic oxidation bed along airflow direction, arranged, wherein the equal fluidized bed 1 of samming is piled up and is formed by honeycomb ceramic heat accumulator, along airflow direction, catalytic oxidation bed is comprised of 3 catalytic oxidation layers 2, each catalytic oxidation layer 2 is filled and is formed by honeycomb type catalyst, between adjacent catalytic oxidation layer 2, leave 3mm gap 3, and the catalyzer of 3 catalytic oxidation layer 2 fillings is along its activity component load quantity of airflow direction, the equal step of specific area and hole density reduces, the activity component load quantity of the catalyzer that adjacent catalytic oxidation layer 2 is filled differs 100g/m
3, specific area differs 500m
2/ m
3, hole density differs 150 orders.
Claims (4)
1. the Combined oxidation bed of a wind-insufficient preheating catalytic oxidizing equipment, comprise the equal fluidized bed of samming (1) and the catalytic oxidation bed along airflow direction, arranged, wherein the equal fluidized bed of samming (1) is piled up and is formed by honeycomb ceramic heat accumulator, it is characterized in that: along airflow direction, catalytic oxidation bed is comprised of a plurality of catalytic oxidation layers (2), each catalytic oxidation layer (2) is filled and is formed by honeycomb type catalyst, and the catalyzer that a plurality of catalytic oxidation layer (2) is filled reduces along the equal step of its activity component load quantity of airflow direction, specific area and hole density.
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: between adjacent catalytic oxidation layer (2), leave 2～5mm gaps (3).
4. the Combined oxidation bed of wind-insufficient preheating catalytic oxidizing equipment as claimed in claim 1, is characterized in that: the activity component load quantity of the catalyzer that adjacent catalytic oxidation layer (2) is filled differs 50～150g/m
3, specific area differs 300～800m
2/ m
3, hole density differs 100～200 orders.
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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 |
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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 |
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| CN103510978A true CN103510978A (en) | 2014-01-15 |
| CN103510978B CN103510978B (en) | 2015-10-14 |
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Cited By (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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3103602B2 (en) * | 1990-01-10 | 2000-10-30 | シエル・インターナシヨネイル・リサーチ・マーチヤツピイ・ベー・ウイ | 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 |
| CN101761354A (en) * | 2009-12-29 | 2010-06-30 | 山东理工大学 | Vertical structure oxidation bed of mine ventilation air 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 |
-
2013
- 2013-10-23 CN CN201310503994.4A patent/CN103510978B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3103602B2 (en) * | 1990-01-10 | 2000-10-30 | シエル・インターナシヨネイル・リサーチ・マーチヤツピイ・ベー・ウイ | 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 |
| CN101761354A (en) * | 2009-12-29 | 2010-06-30 | 山东理工大学 | Vertical structure oxidation bed of mine ventilation air 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 |
Cited By (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 |
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| CN103510978B (en) | 2015-10-14 |
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