CN105062594A - Method for cyclically using triglycol to remove water and impurities carried in natural gas - Google Patents
Method for cyclically using triglycol to remove water and impurities carried in natural gas Download PDFInfo
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- CN105062594A CN105062594A CN201510430915.0A CN201510430915A CN105062594A CN 105062594 A CN105062594 A CN 105062594A CN 201510430915 A CN201510430915 A CN 201510430915A CN 105062594 A CN105062594 A CN 105062594A
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- triglycol
- natural gas
- sweet natural
- heat exchange
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Abstract
The invention discloses a method for cyclically using triglycol to remove water and impurities carried in natural gas. The method comprises the following steps of via pipelines, sequentially conveying wet natural gas A into a gas-liquid separating tank 1, into a filter 2, and into a high-gravity machine 3 to enable the wet natural gas to contact with triglycol in a cross-flow mode for purification, and then outputting the natural gas; via pipelines, sequentially leading impurity-containing triglycol liquid in the high-gravity machine into a heat exchanger 4 for heat exchange, into a flash tank 5 for flash evaporation, into a coarse filter 6 for large-particle solid impurity removal, and into a ceramic membrane filter 7 for small-particle colloid and condensate oil removal; then leading the triglycol liquid into a triglycol rectification device 8 for rectification; buffering the triglycol obtained through rectification through a buffer tank 9; carrying out heat exchange; and putting the triglycol in the high-gravity machine 3 for reuse. The method disclosed by the invention can remove water and impurities carried in natural gas, and the triglycol is used cyclically, so that the pollution and consumption of triglycol are reduced, the potential safety hazards caused by triglycol foaming are avoided, and the corrosion and damage to equipment are also reduced.
Description
Technical field
The present invention relates to the natural gas conditioning field in petroleum chemical industry.
Background technology
Generally all carry a certain amount of moisture from the Sweet natural gas of underground mining, the water dew point value of Sweet natural gas is all higher than set quota (lower than envrionment temperature 5 ~ 15 DEG C on the way).If the Sweet natural gas carrying moisture is when high pressure or low temperature, just have liquid phase water condensation.Liquid phase water has following harm to treatment unit and gas transmission line: 1. limit Sweet natural gas flow velocity in pipeline, reduces displacement; 2. with CO
2, H
2the acidic components mixing generations such as S have corrosive acid; 3. the solid hydrate of outward appearance like ice is generated with micro-molecular gas and mixture high pressure or more than 0 degree.Therefore, each gas gathering station in gas field before transporting must the Sweet natural gas of dewatered clean process extraction, makes the water-content of Sweet natural gas or water dew point value meet index request.
Be easy to regeneration due to triglycol Heat stability is good, steam force down the loss amount carried less, larger depoint depression can be obtained for the absorbent solution of equal in quality percentage concentration, therefore each well station all adopts triglycol to remove as dewatering agent the moisture that Sweet natural gas carries.But aborning, various pollutents, corrosion product and degraded product that Sweet natural gas carries all can be accumulated in triethylene glycol. solution, cause that triglycol effective concentration reduces, dewatering worsens, cause entrainment and cause triglycol to lose in a large number when foaming serious, cause processed gas dew point value not up to standard.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and propose a kind ofly the supergravity reactor basis of reinforcing mass transfer, the mixing of strengthening microcosmic greatly can recycle the method that triglycol removes water that Sweet natural gas carries and impurity.
Technical scheme of the present invention is summarized as follows:
Sweet natural gas moisture A by Cemented filling to knockout drum 1, silk screen is provided with in knockout drum, the gas isolated in Sweet natural gas moisture after the most of drop be mingled with is transported to strainer 2, the gas input hypergravity machine 3 of filters solid impurity and fine droplet contacts with triglycol cross-flow and purifies, and the Sweet natural gas after purification is that B is defeated outward after passing through interchanger 10 heat exchange; Impure triglycol liquid after contacting with the Sweet natural gas cross-flow coming from strainer 2 in hypergravity machine is by pipeline successively input heat exchanger 4 heat exchange, remove H through flash tank 5 flash distillation
2s and CO
2(H
2s and CO
2represent with C in FIG), remove wherein larger particles solid impurity through strainer 6, remove after the burnt colloid of small-particle and condensate oil through purpose ceramic-film filter 7 again and enter triglycol rectifier unit 8 rectifying, safety vent mouth is drained into by rectifier unit top at the isolated water vapour D of rectifier unit 8, the triglycol obtained through rectifier unit rectifying cushions through surge tank 9, again with interchanger 10 heat exchange after, by in pump input hypergravity machine 3, recycle.
Method of the present invention can make triglycol purified natural gas, and can by after purified natural gas remove above-mentioned impurity and water vapour containing the triglycol after the burnt colloid of corrosive impurity, solid impurity and small-particle and condensate oil after recirculation use, avoid the discharge of triglycol, avoid and the triglycol of environment is polluted, reduce cost.
Hypergravity machine of the present invention is compared with tower equipment, and high one to three orders of magnitude of volume transmission quality coefficient, the volume and weight of equipment is only percentum of tower equipment.Liquid is in high dispersive, and high turbulence, strong mixing and interface more contact so that great speed of relative movement is reverse in bending duct with gas under news rapidly, greatly enhance mass transfer process.Transfer unit height reduces 1 ~ 3 order of magnitude, makes huge tower (height more than twenty or thirty rice) reduce to the hypergravity machine highly only having 2 ~ 3 meters.Method of the present invention have employed the high hypergravity machine of mass-transfer efficiency, fast, thoroughly can remove the water in Sweet natural gas moisture.
In addition compared with traditional TEG Dehydration Processing, purpose ceramic-film filter is employed in method of the present invention, it effectively can remove the burnt colloid of the pollutent small-particle be accumulated in triethylene glycol. solution and condensation wet goods, pending feed liquid is flow at high speed in film pipe, under pressure-driven containing the clarified permeation liquid of small molecule component along vertical direction with it outwards through film, muddy concentrated solution tunicle containing macromolecular components retains, thus makes fluid reach the object of separation, concentrated, purifying.Reuse after the triglycol regeneration of filtration, purification, decreases pollution and the consume of triglycol, it also avoid because triglycol foams the potential safety hazard brought simultaneously, decrease the corrosion to equipment and infringement simultaneously.
Accompanying drawing explanation
Fig. 1 recycles the process flow sheet that triglycol removes water that Sweet natural gas carries and impurity.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
What the application's hypergravity machine adopted is the patent No. is: 95107423.7 extra gravity field device of cross current rotary bed, this understands the present invention better to enable those skilled in the art to, but do not impose any restrictions the present invention, all published hypergravity machines all can be used for the present invention.
Sweet natural gas moisture A by Cemented filling to knockout drum 1, silk screen is provided with in knockout drum, the gas isolated in Sweet natural gas moisture after the most of drop (hydrocarbon liquids) be mingled with is transported to strainer 2, the gas input hypergravity machine 3 of filters solid impurity and fine droplet contacts with triglycol cross-flow and purifies, and the Sweet natural gas after purification is that B (qualified dry gas) is defeated outward after passing through interchanger 10 heat exchange, impure triglycol liquid after contacting with the Sweet natural gas cross-flow coming from strainer 2 in hypergravity machine is by pipeline successively input heat exchanger 4 heat exchange, remove H through flash tank 5 flash distillation
2s and CO
2(H
2s and CO
2represent with C in FIG, all through flare system discharge), the liquid of discharging bottom flash tank 5 removes wherein larger particles solid impurity (diameter is greater than 5 μm) through strainer 6, remove through purpose ceramic-film filter 7 again and enter triglycol rectifier unit 8 rectifying after the burnt colloid of small-particle and condensate oil (this rectifier unit comprises rectifying column, reboiler and condenser, moisture triglycol flows into reboiler downwards by rectifying column filler, the hot triglycol steam risen that gasifies in by reboiler contacts with water vapour, condensation triglycol steam and part water vapor), safety vent mouth (normal pressure) is drained into by rectifier unit top at the isolated water vapour D of rectifier unit 8, (reboiler top gas produces phegma by quencher moiety condensation, make to set up thermograde in the feeding port upper end of tower, improve triglycol regeneration effect).Through rectifier unit rectifying obtain triglycol cushion through surge tank 9, then with interchanger 10 heat exchange after (being cooled to 55 DEG C), by pump input hypergravity machine 3 in, recycle.
Hypergravity machine of the present invention is compared with tower equipment, and high one to three orders of magnitude of volume transmission quality coefficient, the volume and weight of equipment is only percentum of tower equipment.Liquid is in high dispersive, and high turbulence, strong mixing and interface more contact so that great speed of relative movement is reverse in bending duct with gas under news rapidly, greatly enhance mass transfer process.Transfer unit height reduces 1 ~ 3 order of magnitude, makes huge tower (height more than twenty or thirty rice) reduce to the hypergravity machine highly only having 2 ~ 3 meters.Method of the present invention have employed the high hypergravity machine of mass-transfer efficiency, fast, thoroughly can remove the water in Sweet natural gas moisture.
In addition compared with traditional TEG Dehydration Processing, purpose ceramic-film filter is employed in method of the present invention, it effectively can remove the burnt colloid of the pollutent small-particle be accumulated in triethylene glycol. solution and condensation wet goods, pending feed liquid is flow at high speed in film pipe, under pressure-driven containing the clarified permeation liquid of small molecule component along vertical direction with it outwards through film, muddy concentrated solution tunicle containing macromolecular components retains, thus makes fluid reach the object of separation, concentrated, purifying.Reuse after the triglycol regeneration of filtration, purification, decreases pollution and the consume of triglycol, it also avoid because triglycol foams the potential safety hazard brought simultaneously, decrease the corrosion to equipment and infringement simultaneously.
Claims (1)
1. recycle the method that triglycol removes water that Sweet natural gas carries and impurity, it is characterized in that comprising the steps: Sweet natural gas moisture A by Cemented filling to knockout drum (1), the gas isolated in Sweet natural gas moisture after the most of drop be mingled with is transported to strainer (2), gas input hypergravity machine (3) of filters solid impurity and fine droplet contacts with triglycol cross-flow and purifies, and the Sweet natural gas after purification is that B is defeated outward after passing through interchanger (10) heat exchange; Impure triglycol liquid after contacting with the Sweet natural gas cross-flow coming from strainer (2) in hypergravity machine passes through pipeline input heat exchanger (4) heat exchange successively, removes H through flash tank (5) flash distillation
2s and CO
2(C), wherein larger particles solid impurity is removed through strainer (6), triglycol rectifier unit (8) rectifying is entered again after the burnt colloid of purpose ceramic-film filter (7) removing small-particle and condensate oil, safety vent mouth is drained into by rectifier unit top at rectifier unit (8) isolated water vapour (D), the triglycol obtained through rectifier unit rectifying cushions through surge tank (9), again with interchanger (10) heat exchange after, inputted in hypergravity machine (3) by pump, recycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430915.0A CN105062594B (en) | 2015-07-21 | 2015-07-21 | The method for recycling the water and impurity of triethylene glycol removing natural gas carrying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430915.0A CN105062594B (en) | 2015-07-21 | 2015-07-21 | The method for recycling the water and impurity of triethylene glycol removing natural gas carrying |
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| Publication Number | Publication Date |
|---|---|
| CN105062594A true CN105062594A (en) | 2015-11-18 |
| CN105062594B CN105062594B (en) | 2017-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114797265A (en) * | 2022-05-20 | 2022-07-29 | 中国海洋石油集团有限公司 | Filtering and purifying system for recycling ethylene glycol |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101333966B1 (en) * | 2011-11-30 | 2013-11-27 | 오씨아이 주식회사 | High efficiency recycling method and system for sawing liquid in waste sludge formed by semiconductor and solar cell wafer using membrane process |
| 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 |
-
2015
- 2015-07-21 CN CN201510430915.0A patent/CN105062594B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101333966B1 (en) * | 2011-11-30 | 2013-11-27 | 오씨아이 주식회사 | High efficiency recycling method and system for sawing liquid in waste sludge formed by semiconductor and solar cell wafer using membrane process |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 郝蕴: "三甘醇脱水工艺探讨", 《中国海上油气（工程）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114797265A (en) * | 2022-05-20 | 2022-07-29 | 中国海洋石油集团有限公司 | Filtering and purifying system for recycling ethylene glycol |
| CN114797265B (en) * | 2022-05-20 | 2024-02-09 | 中国海洋石油集团有限公司 | Filtration and purification system for recycling ethylene glycol |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105062594B (en) | 2017-11-24 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Energy Development Co., Ltd. Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: CNOOC (TIANJIN) PIPELINE ENGINEERING TECHNOLOGY CO., LTD. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Energy Development Co., Ltd. Patentee before: China National Offshore Oil Corporation Co-patentee before: CNOOC (TIANJIN) PIPELINE ENGINEERING TECHNOLOGY CO., LTD. |