CN204973476U - Device of joint decarbonization - Google Patents
Device of joint decarbonization Download PDFInfo
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- CN204973476U CN204973476U CN201520779888.3U CN201520779888U CN204973476U CN 204973476 U CN204973476 U CN 204973476U CN 201520779888 U CN201520779888 U CN 201520779888U CN 204973476 U CN204973476 U CN 204973476U
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- gas
- swing adsorption
- adsorption system
- decarburization
- regeneration gas
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Abstract
The utility model discloses a device of joint decarbonization, it is not high to have solved current pressure swing adsorption method decarbonization precision, and the high nevertheless application of alternating temperature adsorption method precision can cause gaseous a large amount of extravagant problems in the natural gas liquefaction field. The utility model discloses a pressure swing adsorption unit (4) that have gas feed (1), gas outlet (2) and rich carbon dioxide gas export (3), its characterized in that: still be provided with alternating temperature adsorption system (5) on pressure swing adsorption unit (4), air inlet and gas outlet (2) of these alternating temperature adsorption system (5) communicate, still have gas feed (1) intercommunication that the export of product gas, regeneration gas entry (6) and regeneration gas exported (7), this regeneration gas export (7) and pressure swing adsorption unit (4) on these alternating temperature adsorption system (5). The utility model has the advantages of the decarbonization precision is high and avoid the regeneration gas extravagant.
Description
Technical field
The utility model relates to a kind of decarbonization device, and what be specifically related to is a kind of device of associating decarburization.
Background technology
Dry method decarburization has two kinds of methods usually, a kind of is the method (VPSA) of pressure-variable adsorption, both utilized adsorbent by after the carbon dioxide adsorption in gas, adsorbent after absorbing carbon dioxide utilizes the method changing pressure to be desorbed by the carbon dioxide in adsorbent, reach the object of adsorbent reactivation, thus the carbon dioxide adsorption again in adsorbed gas.A kind of is the method (TSA) of Temp .-changing adsorption, both utilized adsorbent by after the carbon dioxide adsorption in gas, adsorbent after absorbing carbon dioxide utilizes the method changing temperature to be desorbed by the carbon dioxide in adsorbent, reach the object of adsorbent reactivation, thus the carbon dioxide adsorption again in adsorbed gas.
The precision of pressure swing adsorption decarbonization is usually high not as the precision of Temp .-changing adsorption decarburization, can not meet purification requirement in the precision of area of natural gas liquefaction pressure swing adsorption decarbonization.The precision of Temp .-changing adsorption decarburization is high, can meet purification in the precision of area of natural gas liquefaction pressure swing adsorption decarbonization, but Temp .-changing adsorption needs regeneration gas to carry out hot blow or cold blowing to adsorption bed, to reach the object changing temperature.
Existing Temp .-changing adsorption flow process, carries out the regeneration gas after hot blow or cold blowing to adsorption bed, normally turns back to Temp .-changing adsorption entrance and unstripped gas together carries out adsorbing or directly discharging temperature swing adsorption system again.When being used for decarburization when Temp .-changing adsorption, regeneration gas after carrying out hot blow or cold blowing to adsorption bed turns back to Temp .-changing adsorption entrance and unstripped gas and together again carries out absorption the carbon dioxide utilizing the method changing temperature to separate sucking-off from adsorbent can be caused again to turn back in unstripped gas, the carbon dioxide content in unstripped gas is caused to raise, cause adsorption bed to penetrate, do not reach the object of decarburization.If when Temp .-changing adsorption is used for decarburization, although the regeneration gas after carrying out hot blow or cold blowing to adsorption bed directly discharges temperature swing adsorption system can reach the object of decarburization but which is only useful in empty point field, if be used in area of natural gas liquefaction, then can cause a large amount of wastes of gas.
Utility model content
It is not high that the purpose of this utility model is to overcome existing pressure swing absorption process decarburization precision, and Temp .-changing adsorption method precision is high but be used in the problem that area of natural gas liquefaction can cause gas to waste in a large number; The device of a kind of associating decarburization solved the problem is provided.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of device of associating decarburization, comprise the pressure-swing absorption apparatus that there is gas feed, gas vent and carbon dioxide enriched gas and export, described pressure-swing absorption apparatus is also provided with temperature swing adsorption system, the air inlet of this temperature swing adsorption system is communicated with gas vent, this temperature swing adsorption system also has the outlet of product gas outlet, regeneration gas entrance and regeneration gas, the outlet of this regeneration gas is communicated with the gas feed of pressure-swing absorption apparatus.
Concrete technology flow process of the present utility model is as follows:
Unstripped gas is introduced into the thick decarburization of pressure-swing absorption apparatus, gas after thick decarburization enters the further decarburization of temperature swing adsorption system again, because the absorption priority of water is higher than carbon dioxide, therefore in the gas through temperature swing adsorption system, if carbon dioxide indicator reaches requirement, now the index of water also just reaches requirement, meets the product index requirement of gas product.Regeneration gas is chosen as unstripped gas or the gas product after decarburization, and after carrying out hot blow or cold blowing by regeneration gas to the adsorption bed of temperature swing adsorption system, this regeneration gas turns back to pressure-swing absorption apparatus gas feed.
By the set-up mode of the utility model device, effectively can reach the object of the thick decarburization of pressure-swing absorption apparatus, temperature swing adsorption system fine decarbonization, meanwhile, effectively avoid the waste of regeneration gas in temperature swing adsorption system.That is, the utility model both can solve the problem that pressure swing adsorption decarbonization precision does not reach product index, also solved the problem of Temp .-changing adsorption regeneration gas waste simultaneously.
In LNG liquefying plant, what dehydration decarburization adopted usually is MDEA decarburization and Temp .-changing adsorption dewatering.The operation of pressure-variable adsorption is more convenient than MDEA Decarburization Operation, and simply, energy consumption is lower.The investment of pressure-variable adsorption is far below MDEA decarburization.Although adopt this flow process can produce the gas loss of trace, loss amount is directly proportional to carbon dioxide in raw gas pressure and unstripped gas, and the gas of loss can utilize again in all the other systems.Therefore this flow process is more easy to operate than existing procedure at Part load, simply, energy consumption is lower, and investment more economizes.
When not containing moisture in unstripped gas, when only using the temperature swing adsorption system in the utility model to carry out Decarburization Operation to unstripped gas; Described temperature swing adsorption system comprises the heater heated regeneration gas, adsorption tower unstripped gas being carried out to decarburization, the cooler composition that cools regeneration gas; Now, in regeneration gas, including the carbon sources such as the carbon dioxide desorbed from adsorption tower, effectively can remove carbon in regeneration gas by turning back to pressure-swing absorption apparatus.When said apparatus is also applicable in unstripped gas and contains moisture and carry out decarburization dehydrating operations to unstripped gas simultaneously, detailed process is: include carbon source and the moisture such as the carbon dioxide desorbed from adsorption tower in regeneration gas, this regeneration gas is directly turned back in pressure-swing absorption apparatus after being cooled by cooler, sloughs carbon source in regeneration gas and moisture by pressure-swing absorption apparatus.
When containing moisture in unstripped gas, when using the temperature swing adsorption system in the utility model to carry out decarburization dehydrating operations to unstripped gas simultaneously; Temperature swing adsorption system of the present utility model, by adsorption tower unstripped gas being carried out to decarburization and dehydration, to the heater that regeneration gas heats, to the cooler that regeneration gas cools, and forms the separator that moisture in regeneration gas is separated.Now, carbon source and the moisture such as the carbon dioxide desorbed from adsorption tower is included in regeneration gas, after this moisture is cooled to liquid state by cooler, separated by separator again, reach the object of sloughing moisture in regeneration gas, the gas sloughed in regeneration gas after moisture turns back in pressure-swing absorption apparatus again sloughs carbon source.
Further, in described temperature swing adsorption system, regeneration gas entrance and gas feed or the air inlet of temperature swing adsorption system or the product gas outlet of temperature swing adsorption system are communicated with.
The utility model compared with prior art, has the following advantages and beneficial effect:
1, by pressure-swing absorption apparatus, effectively to unstripped gas, it carries out thick decarburization to the utility model, more effectively carries out fine decarbonization to unstripped gas through temperature swing adsorption system, effectively improves the decarburization precision of natural gas;
Meanwhile, the utility model, by the outlet of the regeneration gas of temperature swing adsorption system being communicated with the gas feed of pressure-swing absorption apparatus, effectively making regeneration gas enter into pressure-swing absorption apparatus and carries out carbonization treatment, effectively avoid the waste of regeneration gas;
2, the utility model temperature swing adsorption system not only reaches the object of fine decarbonization, and the temperature swing adsorption system in the utility model can also effectively dewater to unstripped gas, makes the gas product of generation meet product index requirement;
3, the utility model structure is simple, and Be very effective is easy to operate, is applicable to very much applying.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the system block diagram of temperature swing adsorption system in embodiment 1.
Fig. 3 is the system block diagram of temperature swing adsorption system in embodiment 2.
Wherein, the parts name that in figure, Reference numeral is corresponding is called:
1-gas feed, 2-gas vent, the carbon dioxide enriched gas outlet of 3-, 4-pressure-swing absorption apparatus, 5-temperature swing adsorption system, 6-regeneration gas entrance, 7-regeneration gas exports;
51-heater, 52-adsorption tower, 53-cooler, 54-separator.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment 1
A kind of device of associating decarburization, as shown in Figure 1, comprise and there is the pressure-swing absorption apparatus 4 that gas feed 1, gas vent 2 and carbon dioxide enriched gas export 3, described pressure-swing absorption apparatus 4 is also provided with temperature swing adsorption system 5, the air inlet of this temperature swing adsorption system 5 is communicated with gas vent 2, this temperature swing adsorption system 5 also has product gas outlet, regeneration gas entrance 6 and regeneration gas outlet 7, this regeneration gas outlet 7 is communicated with the gas feed 1 of pressure-swing absorption apparatus 4, and regeneration gas entrance 6 is communicated with gas feed 1.
In the present embodiment, this temperature swing adsorption system 5 comprises the heater 51 heated regeneration gas, unstripped gas is carried out to the adsorption tower 52 of decarburization, to the cooler 53 that regeneration gas cools, as shown in Figure 2.
The flow process that in the present embodiment, device carries out decarburization to natural gas is as follows:
Containing carbon dioxide in unstripped gas, first, unstripped gas is introduced into pressure-swing absorption apparatus to carry out thick decarburization and obtains thick decarbonization gas, is controlled to by the carbon dioxide content in thick decarbonization gas and is less than 0.5%, separate the carbon dioxide enriched output device of sucking-off from adsorbent.Then, thick decarbonization gas enters the further decarburization of temperature swing adsorption system again, specific works process is: to be removed the carbon dioxide in unstripped gas further by the adsorption tower 52 in temperature swing adsorption system 5 through the unstripped gas of pressure-swing absorption apparatus 4, obtain gas product after carrying out fine decarbonization by this adsorption tower 52, in gas product, carbon dioxide content is less than 50ppm.Finally, after regeneration gas is heated by heater 51, hot blow is carried out to adsorption tower 52, the carbon dioxide of absorption in adsorption tower 52 being desorbed, the regeneration gas containing Desorption of Carbon Dioxide solution should carry out thick decarburization by turning back in pressure-swing absorption apparatus 4 after cooler 53 cooling together with unstripped gas.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: also comprise separator 54 in the present embodiment, while effectively reaching fine decarbonization object, effectively removes the moisture in regeneration gas, as shown in Figure 3.
The separator 54 that moisture in regeneration gas is separated also is comprised in temperature swing adsorption system 5.The principle of this device is, by cooler 53, the water vapor condensation in regeneration gas is become aqueous water, then is separated by the moisture in separator 54 pairs of regeneration gases, and then reaches the object of sloughing moisture in regeneration gas.In the present embodiment, this regeneration gas entrance 6 is communicated with the air inlet of temperature swing adsorption system 5.
The flow process that in the present embodiment, device carries out decarburization to natural gas is as follows:
Containing carbon dioxide and water in unstripped gas, first, unstripped gas is introduced into pressure-swing absorption apparatus to carry out thick decarburization and obtains thick decarbonization gas, is controlled to by the carbon dioxide content in thick decarbonization gas and is less than 0.5% and reduces water content, separate the carbon dioxide enriched of sucking-off and moisture output device from adsorbent.Then, thick decarbonization gas enters the further decarburization of temperature swing adsorption system and dehydration again, specific works process is: the unstripped gas through pressure-swing absorption apparatus 4 removes moisture in unstripped gas and carbon dioxide further by the adsorption tower 52 in temperature swing adsorption system 5, obtain gas product after carrying out fine decarbonization by this adsorption tower 52, in gas product, carbon dioxide content is less than 50ppm.Finally, after regeneration gas is heated by heater 51, hot blow is carried out to adsorption tower 52, the moisture of absorption in adsorption tower 52 and carbon dioxide are desorbed, the regeneration gas of Desorption of Carbon Dioxide solution and moisture should be contained by after cooler 53 cooling, water vapor condensation is become aqueous water, turns back in pressure-swing absorption apparatus 4 after being separated by separator 54 pairs of moisture and carry out thick decarburization together with unstripped gas.
Embodiment 3
The present embodiment is with the difference of embodiment 1: in the present embodiment, this regeneration gas entrance 6 is communicated with the product gas outlet of temperature swing adsorption system 5.
Above-described embodiment is only preferred embodiment of the present utility model; restriction not to the utility model protection domain; in every case design principle of the present utility model being adopted, and the change carried out non-creativeness work on this basis and make, all should belong within protection domain of the present utility model.
Claims (4)
1. the device of an associating decarburization, comprise and there is the pressure-swing absorption apparatus (4) that gas feed (1), gas vent (2) and carbon dioxide enriched gas export (3), it is characterized in that: described pressure-swing absorption apparatus (4) is also provided with temperature swing adsorption system (5), the air inlet of this temperature swing adsorption system (5) is communicated with gas vent (2), this temperature swing adsorption system (5) also has product gas outlet, regeneration gas entrance (6) and regeneration gas outlet (7), this regeneration gas outlet (7) is communicated with the gas feed (1) of pressure-swing absorption apparatus (4).
2. the device of a kind of associating decarburization according to claim 1, it is characterized in that, described temperature swing adsorption system (5) comprises the heater (51) heated regeneration gas, unstripped gas is carried out to the adsorption tower (52) of decarburization, to the cooler (53) that regeneration gas cools.
3. the device of a kind of associating decarburization according to claim 2, is characterized in that, also comprises the separator (54) be separated moisture in regeneration gas in described temperature swing adsorption system (5).
4. the device of a kind of associating decarburization according to claim 1, it is characterized in that, regeneration gas entrance (6) and gas feed (1) or the air inlet of temperature swing adsorption system (5) or the product gas outlet of temperature swing adsorption system (5) are communicated with in described temperature swing adsorption system (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520779888.3U CN204973476U (en) | 2015-10-10 | 2015-10-10 | Device of joint decarbonization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520779888.3U CN204973476U (en) | 2015-10-10 | 2015-10-10 | Device of joint decarbonization |
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| CN204973476U true CN204973476U (en) | 2016-01-20 |
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| CN201520779888.3U Expired - Fee Related CN204973476U (en) | 2015-10-10 | 2015-10-10 | Device of joint decarbonization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227337A (en) * | 2019-07-09 | 2019-09-13 | 北京金隅琉水环保科技有限公司 | CO in a kind of pair of cement kiln end flue gas2Trapping concentrate with utilize system |
| CN111467929A (en) * | 2020-04-15 | 2020-07-31 | 大连海事大学 | Thin gas adsorption and trapping device and adsorption and trapping process and application thereof |
-
2015
- 2015-10-10 CN CN201520779888.3U patent/CN204973476U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227337A (en) * | 2019-07-09 | 2019-09-13 | 北京金隅琉水环保科技有限公司 | CO in a kind of pair of cement kiln end flue gas2Trapping concentrate with utilize system |
| CN111467929A (en) * | 2020-04-15 | 2020-07-31 | 大连海事大学 | Thin gas adsorption and trapping device and adsorption and trapping process and application thereof |
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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: 20160120 Termination date: 20171010 |
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| CF01 | Termination of patent right due to non-payment of annual fee |