CN203247242U - Closed three-tower molecular sieve dehydration device - Google Patents
Closed three-tower molecular sieve dehydration device Download PDFInfo
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- CN203247242U CN203247242U CN 201320230888 CN201320230888U CN203247242U CN 203247242 U CN203247242 U CN 203247242U CN 201320230888 CN201320230888 CN 201320230888 CN 201320230888 U CN201320230888 U CN 201320230888U CN 203247242 U CN203247242 U CN 203247242U
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Abstract
The utility model discloses a closed three-tower molecular sieve dehydration device which comprises at least one group of drying towers, a regeneration gas heater, a regeneration gas cooler and a gas-liquid separation device, wherein the group of drying towers comprises a drying tower I, a drying tower II and a drying tower III. By controlling regeneration gas flow, the closed three-tower molecular sieve dehydration device can realize the functions of absorbing depressurization of molecular sieve towers, and returning regeneration gas to an absorption tower. According to the closed three-tower molecular sieve dehydration device, each tower is controlled by a programmed control valve; the programmed control valves comprise an adsorption valve group, a cold blowing valve group and a heating valve group, and are switched according to a specified period. The three molecular sieve towers of the dehydration device are the same in filling quantity, valve position, valve number and size as each other, thereby having symmetry and exchangeability.
Description
Technical field
The utility model relates to a kind of enclosed three tower molecular sieve dehydration devices, belongs to the natural gas conditioning technical field.
Background technology
At present, the method for gas dehydration generally comprises low temperature process, solvent absorption, solid absorption method, chemical reaction method and membrane separation process etc.The siccative such as the common employing of solid absorption method dehydration molecular sieve carry out adsorption dewatering, and the molecular sieve after the absorption heats the moisture that removes wherein through resurgent gases again.At present in three tower regenerating units, the resurgent gases of molecular sieve is generally the Sweet natural gas of low pressure, from the drying tower downstream, resurgent gases carries out cold blowing for first a tower, resolve through giving a tower after the heating, then cool and isolate moisture, the resurgent gases after the dehydration get back to lp system, maybe need to be recovered to upstream units through topping up compressor.Because resurgent gases can not directly enter the technical process behind the gas dehydration, is unfavorable for the process stream EQUILIBRIUM CALCULATION FOR PROCESS, reclaim increase equipment by supercharger, make the recovery technique of resurgent gases comparatively complicated.
The utility model content
The purpose of this utility model provides a kind of enclosed three tower molecular sieve dehydration devices, the utlity model has the advantages such as easy to operate, safe and reliable, efficient height, strong adaptability.
A kind of enclosed three tower molecular sieve dehydration devices provided by the utility model, it comprises at least 1 group drying tower, resurgent gases well heater, resurgent gases water cooler and gas-liquid separator;
Every group of described drying tower comprises drying tower I, drying tower II and drying tower III;
Wet natural gas enters pipeline and is connected with a take-off line; The cat head of described drying tower I, described drying tower II and described drying tower III enters pipeline with described wet natural gas respectively and described take-off line is connected;
The cat head of described drying tower I, described drying tower II and described drying tower III all is connected with described resurgent gases water cooler by resurgent gases water cooler source line; The outlet of described resurgent gases water cooler is connected with described gas-liquid separator; The gaseous phase outlet of described gas-liquid separator enters pipeline with described wet natural gas and is connected;
All flowing out pipeline with a dry natural gas at the bottom of the tower of described drying tower I, described drying tower II and described drying tower III is connected;
All be connected with described resurgent gases well heater by resurgent gases calorifier inlets pipeline at the bottom of the tower of described drying tower I, described drying tower II and described drying tower III, the outlet of described resurgent gases well heater is connected with at the bottom of the tower of described drying tower I, described drying tower II and described drying tower III respectively by resurgent gases heater outlet pipeline;
Described wet natural gas enters on pipeline and described take-off line and the pipeline that described drying tower I, described drying tower II and described drying tower III are connected and is equipped with control valve near described drying tower I, described drying tower II and described drying tower III end;
Described resurgent gases water cooler source line, described dry natural gas flow out on pipeline, described resurgent gases calorifier inlets pipeline and the described resurgent gases heater outlet pipeline near being equipped with described control valve on described drying tower I, described drying tower II and the described drying tower III end.
In the above-mentioned enclosed three tower molecular sieve dehydration devices, described wet natural gas enters pipeline and is provided with a flowrate control valve, and described flowrate control valve is located at the junction that enters pipeline and described take-off line near described wet natural gas.Described flowrate control valve can play the effect of control flow and decompression.
In the above-mentioned enclosed three tower molecular sieve dehydration devices, described control valve can be sequencing valve; The sequencing valve that arranges on take-off line and the pipeline that described drying tower I, described drying tower II and described drying tower III are connected as described is as cooling valve group, and the sequencing valve that arranges on the described resurgent gases water cooler source line is as cooling valve group;
Described wet natural gas enters the sequencing valve that arranges on pipeline and the pipeline that described drying tower I, described drying tower II and described drying tower III are connected as absorption valve group, and described dry natural gas flows out the sequencing valve that arranges on the pipeline as absorption valve group;
The sequencing valve that arranges on described resurgent gases calorifier inlets pipeline and the described resurgent gases heater outlet pipeline is as the heater valve group.
When the dewatering unit that the utility model provides dewaters, can use three drying towers to move simultaneously, realize that synchronization has a tower dewatering, the process of other two towers regeneration cold blowings.
The utility model compared with prior art has the following advantage that has:
1, flows out bottom Sweet natural gas enters into from the drying tower top in this dewatering unit and dewater, the cold blowing of drying tower enters into the bottom outflow from the top of tower, the heating of drying tower is carried out to the top from the bottom of tower, and the flow direction control of Sweet natural gas is conducive to improve the regeneration effect of molecular sieve tower.
2, the dewatering unit that provides of the utility model adopts the mode of control regeneration air stream, realizes absorbing the step-down of molecular sieve tower, realizes that resurgent gases gets back to the absorption tower.
3, each tower in the dewatering unit that provides of the utility model adopts sequence valve control, and sequencing valve is divided into absorption valve group, cold blowing valve group and heater valve group; The cycle according to the rules of sequencing valve group switches.
4, three molecular sieve towers of the dewatering unit that provides of the utility model, the molecular sieve loadings of every tower, the valve quantity of same position, measure-alike have symmetry and interchangeability.
Description of drawings
Fig. 1 is the structural representation of the utility model enclosed three tower molecular sieve dehydration devices.
Fig. 2 is drying tower I, drying tower II and the drying tower III is adsorbed respectively, the synoptic diagram when cold blowing and heating in the utility model enclosed three tower molecular sieve dehydration devices.
Fig. 3 is drying tower I, drying tower II and the drying tower III heats respectively, the synoptic diagram when absorption and cold blowing in the utility model enclosed three tower molecular sieve dehydration devices.
Fig. 4 is the synoptic diagram when drying tower I, drying tower II and drying tower III are carried out cold blowing, heating and absorption respectively in the utility model enclosed three tower molecular sieve dehydration devices.
Each mark is as follows among the figure: each mark is as follows among the figure: 1 resurgent gases well heater, 2 resurgent gases water coolers, 3 gas-liquid separators, 4 drying tower I, 5 drying tower II, 6 drying tower III, 7 wet natural gas enter pipeline, 8 take-off lines, 9 flowrate control valves, 10 resurgent gases water cooler source lines, 11 dry natural gass flow out pipeline, 12 resurgent gases calorifier inlets pipelines, 13 resurgent gases heater outlet pipelines, 14 gas-liquid separator gaseous phase outlet pipelines, K-1A, K-1B, K-1C, K-2A, K-2B, K-2C adsorbs sequencing valve, K-3A, K-3B, K-3C, K-4A, K-4B, K-4C cools off sequencing valve, K-5A, K-5B, K-5C, K-6A, K-6B, K-6C heats sequencing valve.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further, but the utility model is not limited to following examples.
As shown in Figure 2, the enclosed three tower molecular sieve dehydration devices that the utility model provides comprise 1 group of drying tower, resurgent gases well heater 1, resurgent gases water cooler 2 and gas-liquid separator 3; This group drying tower comprises drying tower I 4, drying tower II 5 and drying tower III 6; Entering pipeline 7 from the wet natural gas of upstream is connected with a take-off line 8, enter pipeline 7 at wet natural gas and be provided with a flowrate control valve 9, this flowrate control valve 9 is located at the junction that enters pipeline 7 and take-off line 8 near wet natural gas, and wherein flowrate control valve 9 can play the effect of control flow and decompression.The cat head of drying tower I 4, drying tower II 5 and drying tower III 6 enters pipeline 7 with wet natural gas respectively and take-off line 8 is connected, and enter the pipeline that pipeline 7 is connected with drying tower I 4, drying tower II 5 and drying tower III 6 at wet natural gas and be respectively arranged with absorption sequencing valve K-1A, K-1B and K-1C, be respectively arranged with on take-off line 8 and the pipeline that drying tower I 4, drying tower II 5 and drying tower III 6 are connected and cool off sequencing valve K-3A, K-3B and K-3C.The cat head of drying tower I 4, drying tower II 5 and drying tower III 6 all is connected with resurgent gases water cooler 1 by resurgent gases water cooler source line 10, the outlet of this resurgent gases water cooler 1 is connected with gas-liquid separator 3, the gaseous phase outlet of gas-liquid separator 3 enters pipeline 7 by gas-liquid separator gaseous phase outlet pipeline 14 and wet natural gas and is connected, and it is extraneous that its liquid-phase outlet leads to this dewatering unit; And be respectively arranged with heating sequencing valve K-5A, heating sequencing valve K-5B and heating sequencing valve K-5C at resurgent gases water cooler source line 10 near drying tower I 4, drying tower II 5 and drying tower III 6 ends.All flow out pipeline 11 with a dry natural gas at the bottom of the tower of drying tower I 4, drying tower II 5 and drying tower III 6 and be connected, on dry natural gas outflow pipeline 11, be respectively arranged with absorption sequencing valve K-2A, K-2B and K-2C near drying tower I 4, drying tower II 5 and drying tower III 6 ends.All be connected with resurgent gases well heater 1 by resurgent gases calorifier inlets pipeline 12 at the bottom of the tower of drying tower I 4, drying tower II 5 and drying tower III 6, the outlet of this resurgent gases well heater 1 is connected with at the bottom of the tower of drying tower I 4, drying tower II 5 and drying tower III 6 respectively by resurgent gases heater outlet pipeline 13; On resurgent gases calorifier inlets pipeline 12, be respectively arranged with cooling sequencing valve K-4A, K-4B and K-4C near drying tower I 4, drying tower II 5 and drying tower III 6 ends, on resurgent gases heater outlet pipeline 13, be respectively arranged with heating sequencing valve K-6A, K-6B and K-6C near drying tower I 4, drying tower II 5 and drying tower III 6 ends.
The drying tower I 4 of the dewatering unit that the utility model provides, drying tower II 5 and drying tower III 6 can be adsorbed respectively in same period, cold blowing and heat-processed.Detailed process is as follows:
When one of them drying tower advanced the adsorption dewatering flow process, the absorption valve group of this drying tower was opened, and cold blowing, heater valve group are closed.As shown in Figure 3, take drying tower I 4 as example, the absorption sequencing valve K-1A of drying tower I 4 and K-2A are opened condition; Cold blowing sequencing valve K-3A and K-4A and heating sequencing valve K-5A and K-6A are closing condition.80%～90% wet natural gas of former upstream enters pipeline 7 by wet natural gas, K-1A enters drying tower I 4 through the absorption sequencing valve, carry out adsorption dewatering in tower, the dry natural gas after the dehydration enters dry natural gas outflow pipeline 11 through absorption sequencing valve K-2A and leads to the downstream.So finish drying process.
When one of them drying tower carried out the cold blowing temperature-fall period, the cold blowing valve group of this drying tower was in opened condition, and absorption and heater valve group are in closing condition.As shown in Figure 4, take drying tower II 5 as example, cold blowing sequencing valve K-3B and K-4B are in opened condition on the drying tower II 5, and absorption sequencing valve K-1B and K-2B and heating sequencing valve K-5B and K-6B are in closing condition.Former 10%～20% wet natural gas is by take-off line 8, enter drying tower II 5 through cold blowing sequencing valve K-3B it is carried out the cold blowing cooling, then at the bottom of the tower of drying tower II 5, enter resurgent gases calorifier inlets pipeline 12 towards revivifier well heater 1 through cold blowing sequencing valve K-4B.
When one of them drying tower carried out the thermal regeneration process, the heater valve group of this drying tower was opened, and absorption, cold blowing valve group are closed.As shown in Figure 4, take drying tower III 6 as example, heating sequencing valve K-5C and K-6C are opened condition on the drying tower III 6; Absorption sequencing valve K-1C and K-2C and cold blowing sequencing valve K-3C and K-4C are closing condition.Through the cold blowing sequencing valve K-4B of the unstripped gas process drying tower II 5 after the row cold blowing enters revivifier well heater 1 and the thermal oil heat exchange intensification from heat-conducting oil system by resurgent gases calorifier inlets pipeline 12 after, resurgent gases after the intensification is by resurgent gases heater outlet pipeline 13, through entering drying tower III 6 behind the heating sequencing valve K-6C, drying tower III 6 makes it regeneration.Finish the resurgent gases of regenerative process through heating sequencing valve K-5C, go to resurgent gases water cooler 2 by resurgent gases water cooler source line 10 and carry out the heat exchange cooling with water coolant.Resurgent gases after the cooling enters gas-liquid separator V-1 and carries out gas-liquid separation, liquid after separating at the bottom of the knockout tower is gone to Sewage treatment systems by pipeline, and the Sweet natural gas of gas-liquid separator 3 cats head enters that wet natural gas enters pipeline 7 and converge with the Sweet natural gas of the Sweet natural gas 80%～90% that adsorbs in carrying out the drying tower I 4 of adsorption process, and dried natural gas via valve absorption sequencing valve K-2A flows out pipeline by dry natural gas and leads to extraneous.
3 drying towers switch successively according to absorption, cold blowing, heating in the dewatering unit of the present utility model.Drying tower I 4, drying tower II 5 and drying tower III 6 are switched according to the sequential loop of absorption-heating-cold blowing-absorption separately.During for example above-mentioned three flow processs were described, within first cycle (such as Fig. 2), drying tower I 4 was carried out adsorption process, and drying tower II 5 is carried out the cold blowing process, and drying tower III 6 is carried out the thermal regeneration process.Therefore, at next cycle (such as Fig. 3), absorption sequencing valve K-1A and the K-2A of drying tower I 4 close, and heating sequencing valve K-5A and K-6A switch to opened condition, cold blowing sequencing valve K-3A and K-4A keep closing condition, and drying tower I 4 begins to carry out the thermal regeneration process within this cycle; Cold blowing sequencing valve K-3B and the K-4B of drying tower II 5 close, and absorption sequencing valve K-1B and K-2B switch to opened condition, and heating sequencing valve K-5B and K-6B keep closing condition, and drying tower II 5 begins to carry out the adsorption dewatering process within this cycle; Heating sequencing valve K-5C and the K-6C of drying tower III 6 close, and cold blowing sequencing valve K-3C and K-4C switch to opened condition, and absorption sequencing valve K-1C and K-2C keep closing condition, and drying tower III 6 begins to carry out the cold blowing temperature-fall period within this cycle.In sum, when three drying towers enter the period 3 (such as Fig. 3), heating sequencing valve K-5A and the K-6A of drying tower I 4 close, cooling sequencing valve K-3A and K-4A switch to opened condition, absorption sequencing valve K-1A and K-2A keep closing condition, and drying tower I 4 begins the process of cooling within this cycle; Absorption sequencing valve K-1B and the K-2B of drying tower II 5 close, and heating sequencing valve K-5B and K-6B switch to opened condition, and cold blowing sequencing valve K-3B and K-4B keep closing condition, and drying tower II 5 begins to carry out the thermal regeneration process within this cycle; Cold blowing sequencing valve K-3C and the K-4C of drying tower III 6 close, and absorption sequencing valve K-1C and K-2C switch to opened condition, and heating sequencing valve K-5C and K-6C keep closing condition, and drying tower III 6 begins to carry out the adsorption dewatering process within this cycle.Above-mentioned three cycle times can be identical.After the 3rd cycle finished, then three drying towers circulated according to said process again through the operation (such as Fig. 2) in first cycle of row.
Claims (3)
1. enclosed three tower molecular sieve dehydration devices, it is characterized in that: described dewatering unit comprises at least 1 group drying tower, resurgent gases well heater, resurgent gases water cooler and gas-liquid separator;
Every group of described drying tower comprises drying tower I, drying tower II and drying tower III;
Wet natural gas enters pipeline and is connected with a take-off line; The cat head of described drying tower I, described drying tower II and described drying tower III enters pipeline with described wet natural gas respectively and described take-off line is connected;
The cat head of described drying tower I, described drying tower II and described drying tower III all is connected with described resurgent gases water cooler by resurgent gases water cooler source line; The outlet of described resurgent gases water cooler is connected with described gas-liquid separator; The gaseous phase outlet of described gas-liquid separator enters pipeline with described wet natural gas and is connected;
All flowing out pipeline with a dry natural gas at the bottom of the tower of described drying tower I, described drying tower II and described drying tower III is connected;
All be connected with described resurgent gases well heater by resurgent gases calorifier inlets pipeline at the bottom of the tower of described drying tower I, described drying tower II and described drying tower III, the outlet of described resurgent gases well heater is connected with at the bottom of the tower of described drying tower I, described drying tower II and described drying tower III respectively by resurgent gases heater outlet pipeline;
Described wet natural gas enters on pipeline and described take-off line and the pipeline that described drying tower I, described drying tower II and described drying tower III are connected and is equipped with control valve near described drying tower I, described drying tower II and described drying tower III end;
Described resurgent gases water cooler source line, described dry natural gas flow out on pipeline, described resurgent gases calorifier inlets pipeline and the described resurgent gases heater outlet pipeline near being equipped with described control valve on described drying tower I, described drying tower II and the described drying tower III end.
2. dewatering unit according to claim 1, it is characterized in that: described wet natural gas enters pipeline and is provided with a flowrate control valve, and described flowrate control valve is located at the junction that enters pipeline and described take-off line near described wet natural gas.
3. dewatering unit according to claim 1 and 2, it is characterized in that: described control valve is sequencing valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320230888 CN203247242U (en) | 2013-05-02 | 2013-05-02 | Closed three-tower molecular sieve dehydration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320230888 CN203247242U (en) | 2013-05-02 | 2013-05-02 | Closed three-tower molecular sieve dehydration device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103254955A (en) * | 2013-05-02 | 2013-08-21 | 中国海洋石油总公司 | Closed-type three-tower molecular sieve dehydration device |
| CN114791087A (en) * | 2022-05-20 | 2022-07-26 | 大庆高浮科技开发有限公司 | Natural gas pressure regulating system |
-
2013
- 2013-05-02 CN CN 201320230888 patent/CN203247242U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103254955A (en) * | 2013-05-02 | 2013-08-21 | 中国海洋石油总公司 | Closed-type three-tower molecular sieve dehydration device |
| CN103254955B (en) * | 2013-05-02 | 2014-12-24 | 中国海洋石油总公司 | Closed-type three-tower molecular sieve dehydration device |
| CN114791087A (en) * | 2022-05-20 | 2022-07-26 | 大庆高浮科技开发有限公司 | Natural gas pressure regulating system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Gas & Power Group Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Gas & Power Group Patentee before: China National Offshore Oil Corporation |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20210502 |
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| CF01 | Termination of patent right due to non-payment of annual fee |