CN103725341A - Dehydration process for purifying natural gas - Google Patents
Dehydration process for purifying natural gas Download PDFInfo
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- CN103725341A CN103725341A CN201210404839.2A CN201210404839A CN103725341A CN 103725341 A CN103725341 A CN 103725341A CN 201210404839 A CN201210404839 A CN 201210404839A CN 103725341 A CN103725341 A CN 103725341A
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Abstract
The invention discloses a dehydration process for purifying natural gas, which comprises the following steps: (a) the purification treatment process of the natural gas is completed; (b) the purified wet natural gas enters the lower part of a dehydration adsorption tower and is in reverse contact with triethylene glycol barren solution in the dehydration adsorption tower from bottom to top so as to remove most of moisture contained in the wet natural gas; (c) the triethylene glycol barren solution adsorbing the moisture exits from the bottom of the adsorption tower, is preheated by a heat exchanger, then enters a flash tank to be subjected to flash evaporation to remove a hydrocarbon component in dehydration solution, is filtered by a filter and enters a regenerating column; (d) part of moisture in the dehydration solution is changed into steam and exits a system from the regenerating column, and the regenerated dehydration solution exits from a reboiler, is subjected to heat exchange and cooling in the heat exchanger and then is fed to the top of the adsorption tower by a pump so as to complete circulation of the dehydration solution. The dehydration process can effectively carry out dehydration on the purified natural gas containing a great volume of water, is low in dehydration cost, has a simple dehydration process and greatly improves the use efficiency of the purified natural gas.
Description
Technical field
The present invention relates to a kind of dewatering process of purified natural gas.
Background technology
Sweet natural gas is that the long-term deposition of extinct plants and animal remains is underground, and through slowly transforming and rotten cracking and the gaseous hydrocarbon that produces, how tool combustibility, follow when oilfield exploitation crude oil.
Sweet natural gas is contained in underground concrete dynamic modulus rock stratum, and main component is methane, proportion approximately 0.65, and lighter than air, has colourless, tasteless, nontoxic characteristic.Natural gas companies is all added odorant (tetramethylene sulfide) in accordance with statutory regulation, as a means of user, smells and distinguishes.After acquiring a certain degree, Sweet natural gas content in air can make people suffocate.Sweet natural gas is the general designation that is present in the mixed gas take hydrocarbon as main body in subsurface rock reservoir.Comprise oil field gas, reservoir gas, coal-seam gas, gas of mud volcano and the biological gas etc. that generates.It is high-grade fuel and industrial chemicals.Wherein the normally former oil volatility part of associated gas, is present on tryphine with the form of gas, has, just oil, tolerance ratio difference in all stratum that has crude oil.Even if the source of the oil and natural gas in same oil field is also not necessarily identical.They come together in identical rock reservoir by different approach with through different processes.If unassociated gas, gathers irrelevantly with liquid state, may result from plant material.In world's gas production, be mainly reservoir gas and oil field gas.To the exploitation of coal-seam gas, now day by day come into one's own.
In Petroleum geology, be often referred to oil field gas and reservoir gas.It forms take hydro carbons as main, and contains non-hydrocarbon gas.The Sweet natural gas of broad sense refers to the gas that in the earth's crust, a restriction of natural generates, and comprises oil field gas, reservoir gas, gas of mud volcano, coal-seam gas and the biological gas etc. that generates.By Sweet natural gas, in the phase of underground existence, can be divided into free state, solubilised state, ADSORPTION STATE and solid water compound.Only have the natural gas via of free state to assemble formation natural gas pool, just can develop.Sweet natural gas main application is to make fuel, can manufacture carbon black, pharmaceutical chemicals and liquefied petroleum gas (LPG), the propane of being produced by Sweet natural gas, the important source material that butane is modern industry.Sweet natural gas is mainly mixed and is formed by gaseous state low molecular hydrocarbon and non-hydrocarbon gas.
Sweet natural gas, is a kind of multi-component mixed gaseous fossil oil, and main component is alkane, and wherein methane accounts for the overwhelming majority, separately has a small amount of ethane, propane and butane.It is mainly present in oil field and natural-gas field, also has on a small quantity for coal seam.After combustion of natural gas, without waste residue, waste water, produce, comparing coal, oil equal energy source has the advantages such as the safety of use, calorific value are high, clean.
From the definition of broad sense, Sweet natural gas refers to the naturally occurring tangential gas of occurring in nature, comprises the gas that in atmospheric sphere, hydrosphere, biosphere and litre geosphere, various natural processes form.And people's definition of general " Sweet natural gas " is for a long time the narrow sense definition from energy point of view, refer to natural hydro carbons in stratum and the mixture of non-hydrocarbon gases contained.
Sweet natural gas is mainly present in oil field gas, reservoir gas, coal-seam gas, gas of mud volcano and biological generation in gas, also has on a small quantity for coal seam.Sweet natural gas can be divided into again two kinds of associated gas and unassociated gass.Follow crude oil symbiosis, the oil field gas being simultaneously plucked out of with crude oil is associated gas; Unassociated gas comprises two kinds of pure gas field Sweet natural gas and gas condensate field Sweet natural gases, in stratum, all with gaseous state, exists.Gas condensate field Sweet natural gas, from well head is flowed out on stratum, along with the decline of pressure and the rising of temperature, is separated into gas-liquid two-phase, and gas phase is gas condensate field Sweet natural gas, and liquid phase is condensed liquid, is condensate oil.
According to Sweet natural gas, contain state, be divided into again three kinds of constructivity Sweet natural gas, water-soluble natural gas, colliery Sweet natural gases etc.And constructivity Sweet natural gas can be divided into the moist Sweet natural gas of following crude oil to produce, the dryness Sweet natural gas that does not contain liquid composition.
Sweet natural gas main component alkane, wherein methane accounts for the overwhelming majority, separately has a small amount of ethane, propane and butane, generally has in addition the rare gas of hydrogen sulfide, carbonic acid gas, nitrogen and aqueous vapor and a small amount of carbon monoxide and trace, as helium and argon etc.Under the normal conditions, methane to butane exists with gaseous phase, and pentane is liquid above.Methane is the shortest and the lightest hydrocarbon molecule.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of dewatering process of purified natural gas is provided, and this technique can effectively be dewatered to containing a large amount of water purification Sweet natural gases, and dehydration cost is low, dehydration is simple, has greatly improved the service efficiency of purified natural gas.
Object of the present invention is achieved through the following technical solutions: the dewatering process of purified natural gas, comprises the following steps:
(a) first, complete the decontamination process of Sweet natural gas;
(b) then, the wet natural gas after purifying treatment enters the bottom on dehydration absorption tower, with poor triglycol solution reverse contact the from bottom to top in dehydration absorption tower, thereby sloughs the most of moisture containing in wet natural gas;
(c) then, the poor triglycol solution that has absorbed moisture from the bottom of absorption tower out, after interchanger preheating, enter flash tank and flash off the hydrocarbon component in dehydrating solution, then be filtered and enter regenerator column;
(d) last, in dehydrating solution, part moisture becomes steam, from regeneration overhead, leaves system, the dehydrating solution after regeneration from reboiler out, cooling with heat exchange in interchanger after, then enter to absorb tower top through pumping, thereby complete the circulation of dehydrating solution.
In sum, the invention has the beneficial effects as follows: can effectively to containing a large amount of water purification Sweet natural gases, dewater, and dehydration cost is low, dehydration is simple, has greatly improved the service efficiency of purified natural gas.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The dewatering process of the purified natural gas the present invention relates to, comprises the following steps:
(a) first, complete the decontamination process of Sweet natural gas;
(b) then, the wet natural gas after purifying treatment enters the bottom on dehydration absorption tower, with poor triglycol solution reverse contact the from bottom to top in dehydration absorption tower, thereby sloughs the most of moisture containing in wet natural gas;
(c) then, the poor triglycol solution that has absorbed moisture from the bottom of absorption tower out, after interchanger preheating, enter flash tank and flash off the hydrocarbon component in dehydrating solution, then be filtered and enter regenerator column;
(d) last, in dehydrating solution, part moisture becomes steam, from regeneration overhead, leaves system, the dehydrating solution after regeneration from reboiler out, cooling with heat exchange in interchanger after, then enter to absorb tower top through pumping, thereby complete the circulation of dehydrating solution.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.
Claims (1)
1. the dewatering process of purified natural gas, is characterized in that, comprises the following steps:
(a) first, complete the decontamination process of Sweet natural gas;
(b) then, the wet natural gas after purifying treatment enters the bottom on dehydration absorption tower, with poor triglycol solution reverse contact the from bottom to top in dehydration absorption tower, thereby sloughs the most of moisture containing in wet natural gas;
(c) then, the poor triglycol solution that has absorbed moisture from the bottom of absorption tower out, after interchanger preheating, enter flash tank and flash off the hydrocarbon component in dehydrating solution, then be filtered and enter regenerator column;
(d) last, in dehydrating solution, part moisture becomes steam, from regeneration overhead, leaves system, the dehydrating solution after regeneration from reboiler out, cooling with heat exchange in interchanger after, then enter to absorb tower top through pumping, thereby complete the circulation of dehydrating solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210404839.2A CN103725341A (en) | 2012-10-11 | 2012-10-11 | Dehydration process for purifying natural gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210404839.2A CN103725341A (en) | 2012-10-11 | 2012-10-11 | Dehydration process for purifying natural gas |
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| CN103725341A true CN103725341A (en) | 2014-04-16 |
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| CN201210404839.2A Pending CN103725341A (en) | 2012-10-11 | 2012-10-11 | Dehydration process for purifying natural gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194854A (en) * | 2014-09-23 | 2014-12-10 | 北京化工大学 | Hypergravity-process triglycol natural gas dehydration system and process using system |
| CN107739635A (en) * | 2017-08-31 | 2018-02-27 | 昆山市恒安工业气体有限公司 | A kind of purifying device for natural gas |
| CN110642969A (en) * | 2019-10-12 | 2020-01-03 | 山东京博中聚新材料有限公司 | Pre-dehydration process of chloromethane |
| CN110681246A (en) * | 2019-07-26 | 2020-01-14 | 北京世云科技有限公司 | Modified triethylene glycol composition and device for dehumidifying low-concentration gas by using same |
-
2012
- 2012-10-11 CN CN201210404839.2A patent/CN103725341A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194854A (en) * | 2014-09-23 | 2014-12-10 | 北京化工大学 | Hypergravity-process triglycol natural gas dehydration system and process using system |
| CN107739635A (en) * | 2017-08-31 | 2018-02-27 | 昆山市恒安工业气体有限公司 | A kind of purifying device for natural gas |
| CN110681246A (en) * | 2019-07-26 | 2020-01-14 | 北京世云科技有限公司 | Modified triethylene glycol composition and device for dehumidifying low-concentration gas by using same |
| CN110681246B (en) * | 2019-07-26 | 2021-12-07 | 北京世云科技有限公司 | Modified triethylene glycol composition and device for dehumidifying low-concentration gas by using same |
| CN110642969A (en) * | 2019-10-12 | 2020-01-03 | 山东京博中聚新材料有限公司 | Pre-dehydration process of chloromethane |
| CN110642969B (en) * | 2019-10-12 | 2022-04-05 | 山东京博中聚新材料有限公司 | Pre-dehydration process of chloromethane |
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Application publication date: 20140416 |