CN102994179A - Molecular sieve dehydration method - Google Patents
Molecular sieve dehydration method Download PDFInfo
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- CN102994179A CN102994179A CN2011102653475A CN201110265347A CN102994179A CN 102994179 A CN102994179 A CN 102994179A CN 2011102653475 A CN2011102653475 A CN 2011102653475A CN 201110265347 A CN201110265347 A CN 201110265347A CN 102994179 A CN102994179 A CN 102994179A
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- molecular sieve
- cold blowing
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Abstract
The invention relates to a natural gas molecular sieve dehydration method. The method comprises the steps that: a valve (1) and a valve (2) are arranged on a molecular sieve dehydration tower cold blowing line; a pressurizing valve, the raw material gas valve, a regeneration gas valve, and a cold blowing valve are arranged at each molecular sieve tower; ABC three-tower, AB two-tower, AC two-tower, and BC two-tower sequence-controlled working programs are programmed in a natural gas processing device DCS system; when three-tower or two-tower working is needed, three-tower or two-tower sequence-controlled working programs are stated; the valve (2) is opened, the valve (1) is closed, and the ABC three towers work; the valve (2) is closed, the valve (1) is opened, and any two towers work. According to the invention, molecular sieves of A, B, and C three towers can be respectively replaced according to requirements, and normal production process is not affected. With the molecular sieve dehydration method provided by the invention, production requirements of the realization of both three-tower working and two-tower working can be satisfied, and molecular sieves can be replaced without shutting down the device.
Description
Technical field
The present invention relates to a kind of gas dehydration method, particularly relate to a kind of natural gas molecular sieve dehydrating method.
Background technology
Molecular sieve dehydration is mainly used in the processing of Sweet natural gas deep cooling, can make the rear Sweet natural gas water content＜1ppm (V) of dehydration, and molecular sieve dehydration technique is because it is stable, dehydrating effect is widely used in natural gas treatment plant efficiently.
At present all there is a shortcoming in molecular sieve two tower switching methods and the three tower switching methods in usefulness in the production scene: can't realize namely that natural gas treatment plant does not stop production and change the requirement of molecular sieve.Need to change molecular sieve because molecular sieve used after several years, need this moment natural gas treatment plant to stop, Sweet natural gas is directly outer to be passed to the downstream pipe network, just can carry out more changing jobs of molecular sieve, has affected liquefied gas output and the lighter hydrocarbons output of natural gas treatment plant.
Summary of the invention
The defective that exists for overcoming above-mentioned prior art, the technical problem to be solved in the present invention provide and a kind ofly can realize that natural gas treatment plant does not stop production and change the natural gas molecular sieve dehydrating method of molecular sieve.
The molecular sieve dehydration method that the present invention solves the problems of the technologies described above comprises the steps:
Mounted valve 1 and valve 2 on molecular sieve dehydration ABC three tower cold blowing lines;
At each molecular sieve tower equalizer valve, raw material air valve, regeneration air valve, cold blowing air valve are set;
Work out respectively the sequence working routine of ABC three towers, AB two towers, AC two towers, BC two towers in natural gas treatment plant DCS system, when needs ABC three towers are worked, start ABC three tower sequence working routines; When needs AB two towers are worked, start AB two tower sequence working routines; When needs AC two towers are worked, start AC two tower sequence working routines; When needs BC two towers are worked, start BC two tower sequence working routines;
Open valve 2, valve-off 1, ABC three tower work, job order is the process that A, B, C three cone pulleys stream are realized absorption, regeneration, cold blowing, the valve working order is according to compiling and editing the programmed sequence action;
Valve-off 2 is opened valve 1, any two tower work in ABC three towers, and an other tower stops, and changes respectively the molecular sieve of A, B, C three towers:
When changing A tower molecular sieve, B, C tower are work tower, and BC two towers are according to compiling and editing the programmed sequence action, and the molecular sieve dehydration process continues, and during the absorption of B tower, the C tower is finished regeneration and cold blowing process, and during the absorption of C tower, the B tower is finished regeneration and cold blowing process;
When changing B tower molecular sieve, A, C tower are work tower, and AC two towers are according to compiling and editing the programmed sequence action, and the molecular sieve dehydration process continues, and during the absorption of A tower, the C tower is finished regeneration and cold blowing process, and during the absorption of C tower, the A tower is finished regeneration and cold blowing process;
When changing C tower molecular sieve, A, B tower are work tower, and AB two towers are according to compiling and editing the programmed sequence action, and the molecular sieve dehydration process continues, and during the absorption of A tower, the B tower is finished regeneration and cold blowing process, and the A tower is finished regeneration and cold blowing process.
After adopting such method, realize the requirement of the mutual cut-in stand-by of molecular sieve " three tower process flow processs " and " two tower process flow processs ", reached the purpose of installing the replacing molecular sieve that do not stop; Device needs molecular sieve of replacing in 3 years, change a molecular sieve and need 7 days time, the designing treatment ability is that the treatment unit in 1,000,000 side/skies is produced 100 tons of liquefied gas every day, produce 50 tons of stable light hydrocarbons, device shutdown period can be reduced like this, 700 ton liquefied gas and 350 ton stable light hydrocarbons can be produced in 3 years more.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is molecular sieve dehydration process flow sheet of the present invention.
Embodiment
After the new molecular sieve dehydration method invention, in the deep cooling reconstruction and extension project of gas conditioning station, implemented, from the device design phase just require designing institute to design according to the method, pipelining drawing and equipment ordering table have been designed, the owner orders goods to equipment according to design paper and installs, and in the DCS system configuration, ABC three towers, AB two towers, AC two towers, four kinds of mode of operation of BC two towers are all carried out configuration and the field adjustable of sequence program, reached the target of the method technological improvement.
As shown in Figure 1, on molecular sieve dehydration ABC three tower cold blowing lines increased valve 1 and valve 2; Be provided with equalizer valve, raw material air valve, regeneration air valve, cold blowing air valve at each molecular sieve tower.In natural gas treatment plant DCS system, worked out respectively the sequence working routine of ABC three towers, AB two towers, AC two towers, BC two towers.When needs ABC three towers are worked, start ABC three tower sequence working routines; When needs AB two towers are worked, start AB two tower sequence working routines; When needs AC two towers are worked, start AC two tower sequence working routines; When needs BC two towers are worked, start BC two tower sequence working routines.
When three towers all needed to operate, valve 2 was opened, and valve 1 is closed, and this moment, job order was the process that A, B, C three cone pulleys stream are realized absorption, regeneration, cold blowing, and each tower is work 8 hours, and the valve working order is according to the programmed sequence action of compiling and edit.
Valve-off (2) is opened valve (1), any two tower work in ABC three towers, and an other tower stops, and changes respectively the molecular sieve of A, B, C three towers:
When the A tower need to be changed molecular sieve and stops to come into operation, this moment, work tower was B, C tower, and B, C tower are according to the programmed sequence action of compiling and edit.The molecular sieve dehydration process can continue, and during the absorption of B tower, the C tower is finished regeneration and cold blowing process, B tower absorption 8 hours, C tower regeneration 5 hours, cold blowing 2.5 hours; During the absorption of C tower, the B tower is finished regeneration and cold blowing process, C tower absorption 8 hours, B tower regeneration 5 hours, cold blowing 2.5 hours.
When the B tower need to be changed molecular sieve and stops to come into operation, this moment, work tower was A, C tower, and A, C tower are according to the programmed sequence action of compiling and edit.The molecular sieve dehydration process can continue, and during the absorption of A tower, the C tower is finished regeneration and cold blowing process, A tower absorption 8 hours, C tower regeneration 5 hours, cold blowing 2.5 hours; During the absorption of C tower, the A tower is finished regeneration and cold blowing process, C tower absorption 8 hours, A tower regeneration 5 hours, cold blowing 2.5 hours.
When the C tower need to be changed molecular sieve and stops to come into operation, this moment, work tower was A, B tower, and A, B tower are according to the programmed sequence action of compiling and edit.The molecular sieve dehydration process can continue, and during the absorption of A tower, the B tower is finished regeneration and cold blowing process, A tower absorption 8 hours, B tower regeneration 5 hours, cold blowing 2.5 hours; During the absorption of B tower, the A tower is finished regeneration and cold blowing process, B tower absorption 8 hours, A tower regeneration 5 hours, cold blowing 2.5 hours.
The technological improvement of molecular sieve three tower process methods has realized that natural gas molecular sieve dehydrating can satisfy the operation of three towers, can realize again the operation of two towers, simultaneously, has reached the purpose of installing the replacing molecular sieve that do not stop.
Claims (1)
1. a molecular sieve dehydration method comprises the steps:
Mounted valve (1) and valve (2) on molecular sieve dehydration ABC three tower cold blowing lines;
At each molecular sieve tower equalizer valve, raw material air valve, regeneration air valve, cold blowing air valve are set;
Work out respectively the sequence working routine of ABC three towers, AB two towers, AC two towers, BC two towers in natural gas treatment plant DCS system, when needs ABC three towers are worked, start ABC three tower sequence working routines; When needs AB two towers are worked, start AB two tower sequence working routines; When needs AC two towers are worked, start AC two tower sequence working routines; When needs BC two towers are worked, start BC two tower sequence working routines;
Open valve (2), valve-off (1), ABC three tower work, job order is the process that A, B, C three cone pulleys stream are realized absorption, regeneration, cold blowing, the valve working order is according to compiling and editing the programmed sequence action;
Valve-off (2) is opened valve (1), any two tower work in ABC three towers, and an other tower stops, and changes respectively the molecular sieve of A, B, C three towers:
When changing A tower molecular sieve, B, C tower are work tower, and BC two towers are according to compiling and editing the programmed sequence action, and the molecular sieve dehydration process continues, and during the absorption of B tower, the C tower is finished regeneration and cold blowing process, and during the absorption of C tower, the B tower is finished regeneration and cold blowing process;
When changing B tower molecular sieve, A, C tower are work tower, and AC two towers are according to compiling and editing the programmed sequence action, and the molecular sieve dehydration process continues, and during the absorption of A tower, the C tower is finished regeneration and cold blowing process, and during the absorption of C tower, the A tower is finished regeneration and cold blowing process;
When changing C tower molecular sieve, A, B tower are work tower, and AB two towers are according to compiling and editing the programmed sequence action, and the molecular sieve dehydration process continues, and during the absorption of A tower, the B tower is finished regeneration and cold blowing process, and the A tower is finished regeneration and cold blowing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102653475A CN102994179A (en) | 2011-09-08 | 2011-09-08 | Molecular sieve dehydration method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102653475A CN102994179A (en) | 2011-09-08 | 2011-09-08 | Molecular sieve dehydration method |
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| CN102994179A true CN102994179A (en) | 2013-03-27 |
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| CN2011102653475A Pending CN102994179A (en) | 2011-09-08 | 2011-09-08 | Molecular sieve dehydration method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046401A (en) * | 2014-06-27 | 2014-09-17 | 成都赛普瑞兴科技有限公司 | Device and method for four-tower dehydration and heavy hydrocarbon removal of natural gas |
| CN107216923A (en) * | 2017-06-27 | 2017-09-29 | 成都深冷液化设备股份有限公司 | The composite bed adsorbent equipment of natural gas pretreatment |
| CN107504370A (en) * | 2017-08-04 | 2017-12-22 | 中核兰州铀浓缩有限公司 | A kind of Process Control System for centrifuging pipeline between tandem in uranium enrichment system |
| CN115109624A (en) * | 2021-03-23 | 2022-09-27 | 中国石油天然气股份有限公司 | Separation device for natural gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5626527A (en) * | 1979-08-13 | 1981-03-14 | Marutani Kakoki Kk | Dehumidification of compressed air |
-
2011
- 2011-09-08 CN CN2011102653475A patent/CN102994179A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5626527A (en) * | 1979-08-13 | 1981-03-14 | Marutani Kakoki Kk | Dehumidification of compressed air |
Non-Patent Citations (1)
| Title |
|---|
| 付秀勇等: "大涝坝集气处理站分子筛脱水工艺流程改造", 《石油与天然气化工》, vol. 36, no. 5, 31 December 2007 (2007-12-31) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046401A (en) * | 2014-06-27 | 2014-09-17 | 成都赛普瑞兴科技有限公司 | Device and method for four-tower dehydration and heavy hydrocarbon removal of natural gas |
| CN104046401B (en) * | 2014-06-27 | 2016-03-30 | 成都赛普瑞兴科技有限公司 | The devices and methods therefor of the de-heavy hydrocarbon of a kind of Sweet natural gas four tower dehydration |
| CN107216923A (en) * | 2017-06-27 | 2017-09-29 | 成都深冷液化设备股份有限公司 | The composite bed adsorbent equipment of natural gas pretreatment |
| CN107504370A (en) * | 2017-08-04 | 2017-12-22 | 中核兰州铀浓缩有限公司 | A kind of Process Control System for centrifuging pipeline between tandem in uranium enrichment system |
| CN107504370B (en) * | 2017-08-04 | 2020-02-18 | 中核兰州铀浓缩有限公司 | Process control system of pipeline between cascade stages in centrifugal uranium enrichment system |
| CN115109624A (en) * | 2021-03-23 | 2022-09-27 | 中国石油天然气股份有限公司 | Separation device for natural gas |
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Application publication date: 20130327 |