CN202052338U - Metallic packing fractionating tower used for separating combustible gas - Google Patents
Metallic packing fractionating tower used for separating combustible gas Download PDFInfo
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- CN202052338U CN202052338U CN2011201278016U CN201120127801U CN202052338U CN 202052338 U CN202052338 U CN 202052338U CN 2011201278016 U CN2011201278016 U CN 2011201278016U CN 201120127801 U CN201120127801 U CN 201120127801U CN 202052338 U CN202052338 U CN 202052338U
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- metal packing
- sieve plate
- fractionating column
- metallic packing
- fire relief
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Abstract
The utility model relates to a metallic packing fractionating tower used for separating combustible gas, which comprises a fractionating tower body. A condenser is arranged on the upper portion of the fractionating tower body, an evaporator is arranged on the lower portion of the fractionating tower body, a feeding inlet is arranged on the middle of the fractionating tower body, an upper section of the metallic packing is arranged above the feeding inlet, a lower section of the metallic packing is arranged under the feeding inlet, and a metallic packing tower is provided with at least one fire resistance sieve plate. Sieve holes of the sieve plate arranged in the metallic packing tower can effectively prevent flame from passing through, simultaneously heat produced by burning can be absorbed by the metallic packing with large heat transfer area, and liquid is led to be evaporated. After the liquid is evaporated, concentration of the combustible gas in gas is led to exceed burning range, effects of fire extinction are achieved, a structure combining the fire resistance sieve plate with the metallic packing has an effect of double insurance, so that the metallic packing fractionating tower can effectively avoid burning and explosive accidents.
Description
Technical field
The utility model relates to a kind of gas fractionator, especially a kind of metal packing fractionating column that is used to separate imflammable gas.
Background technology
Adopting gas fractionator that mist is separated is a kind of method of cryogenic rectification commonly used, and it is earlier admixture of gas to be condensed into liquid, and then by the difference of each component evaporating temperature, in fractionating column they is separated.In recent years, because energy scarcity, the separation utilization of imflammable gas mixture causes people's attention gradually.For example coal mine mash gas is exactly a kind of imflammable gas mixture, wherein contains 30%～45% methane, and all the other are air.In order to utilize methane gas (natural gas just) wherein well, adopt gas fractionator that coal mine gas gas is carried out cryogenic separation with regard to needs.
The separation of imflammable gas mixture exists certain potential safety hazard.Have only the rule of having grasped it, can guarantee safety.Imflammable gas burning and blast have three key elements, and exactly: 1) imflammable gas is in certain concentration range; 2) there is the above oxygen of least concentration to exist; 3) incendiary source of minimum temperature, energy, duration is arranged.These three key elements, indispensable, as long as lack a key element, burning and blast just can not take place in it.For example in the project of coal mine mash gas cryogenic separation, unstripped gas contains methane more than 30%, has exceeded the concentration range (being generally 5～15%) of methyl hydride combustion and blast under the normal temperature and pressure.Therefore, in the ordinary course of things, the possibility of burning and blast takes place in device.But in the low-temperature fractionation tower, the methane concentration of gas gradually changes, and the methane concentration at the bottom of the tower is the highest, and the methane concentration of cat head is minimum.Therefore must have one section in fractionating column, the methane concentration of its gas just in time is in the concentration range of methyl hydride combustion and blast.Although can take measures, avoid in fractionating column, occurring electrostatic spark, to prevent to burn and the generation of explosion accident,, also should improve the structure of fractionating column in order to ensure entirely.
Usually the structure of fractionating column is divided into two kinds of sieve-plate tower and packed towers.Sieve-plate tower is that tens of layer (30～40 layers) sieve plate are installed in the tower, and the diameter of sieve aperture does not wait from 0.8～2mm according to the size of equipment flow, because number of screen decks is many, so sieve diameter can not be too little, person's resistance is just too not big.In addition, sieve-plate tower is compared with packed tower, and heat transfer area is also much smaller.Packed tower is to fill out to have put many metals or non-metallic fillers in tower, because the concentration of imflammable gas mixture is unstable usually, and the metal packing tower have work good springiness, resistance little, be not easy to produce advantage such as static, heat transfer area is big, so be well suited for the separation of imflammable gas.But the gap of metal packing tower is bigger than normal, generally all more than several millimeters.
According to the principle of spark arrester, passage of flame is more little, and heat transfer area is big more, the cooling effect of wall and the heat loss that produces just strengthens, and the anakmetomeres of participating in burning just reduce, and cause ignition temperature to reduce with flame propagation velocity and reduce.When channel diameter little to a certain degree, heat transfer area greatly to a certain degree the time, flame just can not by and propagation.According to the test of International Power association (IEC), different imflammable gas has different " maximum experiment safety gap ", and for example: acetylene is 0.25mm, and hydrogen is 0.28mm, and ethene is 0.65mm, and propylene is 0.90mm, and methane is 1.12mm.Like this, how bringing into play the advantage of metal packing tower on imflammable gas separates on the one hand, can make it have good back-fire relief function on the other hand again, is exactly the problem that needs solve.
The utility model content
The utility model is at how bringing into play the advantage of metal packing tower on imflammable gas separates on the one hand, can make it have the needs of good back-fire relief function on the other hand again, a kind of metal packing fractionating column that is used to separate imflammable gas is provided, and this fractionating column can prevent burning and the blast that imflammable gas may occur effectively in separation process.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of metal packing fractionating column that is used to separate imflammable gas, comprise the fractionating column tower body, the top of described fractionating column tower body is provided with condenser, the bottom is provided with evaporimeter, the middle part is provided with charging aperture, the top of described charging aperture has the epimere metal packing, and the below of described charging aperture has the hypomere metal packing, is provided with at least one back-fire relief sieve plate in the described metal packing fractionating column.
On the basis of technique scheme, the utility model can also be done following improvement.
Further, the quantity of described back-fire relief sieve plate is 1～3.
Further, when the quantity of described back-fire relief sieve plate was 1, described back-fire relief sieve plate was located in the epimere metal packing, in the hypomere metal packing or between epimere metal packing and the hypomere metal packing.
Further, when the quantity of described back-fire relief sieve plate was 2, described back-fire relief sieve plate was located in the epimere metal packing, in the hypomere metal packing and any two positions between epimere metal packing and the hypomere metal packing.
Promptly, described back-fire relief sieve plate can be located in the epimere metal packing and the hypomere metal packing in, also can be located in the epimere metal packing and between epimere metal packing and the hypomere metal packing, also can be located in the hypomere metal packing and between epimere metal packing and the hypomere metal packing.
Further, when the quantity of described back-fire relief sieve plate was 3, described back-fire relief sieve plate was located in the epimere metal packing respectively, in the hypomere metal packing and between epimere metal packing and the hypomere metal packing.
Further, the sieve diameter of described back-fire relief sieve plate is less than or equal to the maximum experiment safety gap of imflammable gas in the divided gas flow.
Further, be provided with liquid successively below the described every back-fire relief sieve plate and collect device and liquid distribution trough.
The quantity of described back-fire relief sieve plate and installation site will determine that general only the needs installed 1～3, is installed in the zone of the easiest generation burning of imflammable gas concentration according to the situation of the imflammable gas that is separated concentration in fractionating column.Other structure of described back-fire relief sieve plate is identical with the sieve-plate structure of common sieve-plate tower.
The beneficial effects of the utility model are: the utility model is used for separating the metal packing fractionating column of imflammable gas, the sieve aperture of its sieve plate will prevent effectively that flame from passing through, simultaneously, the heat that burning produces can be absorbed by the very big metal packing of heat transfer area again, make the liquid evaporation, after the liquid evaporation, will make the concentration of the imflammable gas in the gas exceed its combustion range, played the effect of fire extinguishing, back-fire relief sieve plate and metal packing structure combining can have the effect of double insurance, prevent the generation of burning and explosion accident effectively, guaranteed the safety of production process; Simultaneously, because it is few to have the number of screen decks of less sieve aperture, the resistance of fractionating column does not significantly increase yet.
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Description of drawings
Fig. 1 is used to separate the structural representation of the metal packing fractionating column of imflammable gas for the utility model.
The specific embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.
As shown in Figure 1, the described metal packing fractionating column that is used for separating imflammable gas is used in the coal mine mash gas cryogenic separation, comprise fractionating column tower body 1, the top of described fractionating column tower body 1 is provided with condenser 2, the bottom is provided with evaporimeter 3, the middle part is provided with charging aperture 4, the top of described charging aperture 4, the below of condenser 2 has epimere metal packing 5, the top of described evaporimeter 3, the below of charging aperture 4 has hypomere metal packing 6, in the present embodiment, be provided with a back-fire relief sieve plate 7 successively along from top to bottom direction between described epimere metal packing 5 and the hypomere metal packing 6, liquid is collected device 8 and liquid distribution trough 9.Compressed purification and cooled coal mine mash gas raw material, its methane concentration is 45%, enters from the middle part charging aperture 4 of fractionating column.Calculating can be known, at the fractionating column middle part, the methane concentration of gas is about 10%, just in time be in the intermediate point of the concentration range that methane burns at normal temperatures and pressures, though because the low-temperature condition of fractionating column diminishes the concentration range of methyl hydride combustion, 10% methane concentration still has the possibility of burning herein.Therefore at the middle part of fractionating column, a back-fire relief sieve plate 7 has been installed below epimere metal packing 5, in order to collect liquid that sieve plate flows down and liquid to be evenly distributed in the hypomere metal packing 6, below back-fire relief sieve plate 7, liquid has been installed has again been collected device 8 and liquid distribution trough 9.Liquid collects device 8 and liquid distribution trough 9 is conventional structures, does not need to describe in detail.
The sieve diameter of back-fire relief sieve plate 7 is designed to 0.9mm, less than the maximum experiment safety gap 1.12mm of methane gas.
Sieve aperture centre distance is 3.25mm, the liquid outlet height of weir 8mm of sieve plate, and the height liquid seal of overflow mechanism outlet is 12mm, these are conventional design of sieve plate, no longer are described in detail.
Be in the coal mine mash gas of gas-liquid two-phase state, enter fractionating column after, gas is to rising, liquid is to dirty.Gas need be the sieve aperture of 0.9mm by the diameter of back-fire relief sieve plate 7, just can enter the top of tower.
Therefore, if for a certain reason, produced spark, caused burning, sieve aperture will prevent effectively that flame from passing through.Simultaneously, the heat that burning produces can be absorbed by the very big metal packing of heat transfer area again, makes the liquid evaporation, because the methane concentration of liquid is much larger than the methane concentration of gas, after the liquid evaporation, will make methane concentration in the gas exceed its combustion range, play the effect of fire extinguishing.Therefore, this back-fire relief sieve plate and metal packing structure combining can have the effect of double insurance, have prevented the generation of burning and explosion accident effectively.Simultaneously, have only one because have the sieve plate of less sieve aperture, the resistance of fractionating column does not significantly increase yet.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. metal packing fractionating column that is used to separate imflammable gas, comprise the fractionating column tower body, the top of described fractionating column tower body is provided with condenser, the bottom is provided with evaporimeter, the middle part is provided with charging aperture, has the epimere metal packing between the top of described charging aperture and the below of condenser, has the hypomere metal packing between the top of described evaporimeter and the below of charging aperture, it is characterized in that, be provided with at least one back-fire relief sieve plate in the described metal packing fractionating column.
2. the metal packing fractionating column that is used to separate imflammable gas according to claim 1 is characterized in that the quantity of described back-fire relief sieve plate is 1～3.
3. the metal packing fractionating column that is used to separate imflammable gas according to claim 2, it is characterized in that, when the quantity of described back-fire relief sieve plate was 1, described back-fire relief sieve plate was located in the epimere metal packing, in the hypomere metal packing or between epimere metal packing and the hypomere metal packing.
4. the metal packing fractionating column that is used to separate imflammable gas according to claim 2, it is characterized in that, when the quantity of described back-fire relief sieve plate was 2, described back-fire relief sieve plate was located in the epimere metal packing, in the hypomere metal packing and any two positions between epimere metal packing and the hypomere metal packing.
5. the metal packing fractionating column that is used to separate imflammable gas according to claim 2, it is characterized in that, when the quantity of described back-fire relief sieve plate was 3, described back-fire relief sieve plate was located in the epimere metal packing respectively, in the hypomere metal packing and between epimere metal packing and the hypomere metal packing.
6. the metal packing fractionating column that is used to separate imflammable gas according to claim 1 is characterized in that, the sieve diameter of described back-fire relief sieve plate is less than or equal to the maximum experiment safety gap of imflammable gas in the divided gas flow.
7. the metal packing fractionating column that is used to separate imflammable gas according to claim 1 is characterized in that, the below of described every back-fire relief sieve plate is provided with liquid successively and collects device and liquid distribution trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201278016U CN202052338U (en) | 2011-04-27 | 2011-04-27 | Metallic packing fractionating tower used for separating combustible gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201278016U CN202052338U (en) | 2011-04-27 | 2011-04-27 | Metallic packing fractionating tower used for separating combustible gas |
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| CN202052338U true CN202052338U (en) | 2011-11-30 |
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| CN2011201278016U Expired - Fee Related CN202052338U (en) | 2011-04-27 | 2011-04-27 | Metallic packing fractionating tower used for separating combustible gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267402A (en) * | 2013-06-08 | 2013-08-28 | 中煤科工集团重庆研究院 | Method for extracting methane contained in low-concentration oxygen-containing coal-seam gas |
| CN103307854A (en) * | 2013-06-08 | 2013-09-18 | 中煤科工集团重庆研究院 | Anti-explosion rectifying tower for low-concentration coal seam gas liquefaction and concentration |
| CN113491883A (en) * | 2021-08-12 | 2021-10-12 | 江西全兴化工填料有限公司 | Metal-packed fractionating tower for separating combustible gas |
-
2011
- 2011-04-27 CN CN2011201278016U patent/CN202052338U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267402A (en) * | 2013-06-08 | 2013-08-28 | 中煤科工集团重庆研究院 | Method for extracting methane contained in low-concentration oxygen-containing coal-seam gas |
| CN103307854A (en) * | 2013-06-08 | 2013-09-18 | 中煤科工集团重庆研究院 | Anti-explosion rectifying tower for low-concentration coal seam gas liquefaction and concentration |
| CN103267402B (en) * | 2013-06-08 | 2015-09-09 | 中煤科工集团重庆研究院有限公司 | Extract the method for methane in low concentration coalbed methane containing oxygen |
| CN113491883A (en) * | 2021-08-12 | 2021-10-12 | 江西全兴化工填料有限公司 | Metal-packed fractionating tower for separating combustible gas |
| CN113491883B (en) * | 2021-08-12 | 2022-06-28 | 江西全兴化工填料有限公司 | Metal packed fractionating tower for separating combustible gas |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20180427 |
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| CF01 | Termination of patent right due to non-payment of annual fee |