CN100520265C - Cooling water plant for a natural gas conversion complex - Google Patents
Cooling water plant for a natural gas conversion complex Download PDFInfo
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- CN100520265C CN100520265C CN 200580016161 CN200580016161A CN100520265C CN 100520265 C CN100520265 C CN 100520265C CN 200580016161 CN200580016161 CN 200580016161 CN 200580016161 A CN200580016161 A CN 200580016161A CN 100520265 C CN100520265 C CN 100520265C
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- seawater
- cooling
- natural gas
- heat exchanger
- gas conversion
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Abstract
The invention provides a cooling method for a natural gas conversion complex. The method includes the steps of circulating sea water in a first, open, cooling circuit (12); contacting the sea water with a heat exchanger (14) to absorb heat; cooling the sea water from the outflow of the heat exchanger (14); circulating fresh water in a second, closed, cooling circuit (18); and contacting the fresh water with the heat exchanger (14) to lose heat.
Description
Technical field
The present invention relates to be used for the cooling means and the equipment of natural gas conversion complex.
Background technology
Typical natural gas conversion complex is produced package as the natural gas liquefaction (GTL) of 220 tphs (t/h), always the cooling water demand of total about 2400MW.Mainly cooling water need be used for the steam in condensation air separator (ASU) and the TRT steam turbine condenser.For the heat exchanger in the GTL treating apparatus, also need cooling water.Known the cooling water demand that can satisfy ASU and TRT by disposable salt water cooling system.Know that also available cooling system of fresh water satisfies the demand of heat exchanger in the treating apparatus.For typical GTL produced package, salt water cooling system had the circular flow of about 123000t/h, and its temperature difference is 15 ℃ between the seawater of wherein introducing and discharging.Cooling system of fresh water usually needs the circular flow of about 14300t/h, and wherein the cold water source and the temperature difference that turns back between the hot water of cooling tower are 14 ℃.The water of system loss compensates by offer cooling tower after waste water is handled in sewage treatment equipment.It should be understood that the seawater after the heating turns back to meeting heating ocean in the ocean, brings harmful effect to environment.The purpose of this invention is to provide effective cooling means of a kind of cost and equipment, can improve influence environment.
Summary of the invention
According to first scheme of the present invention, a kind of cooling means that is used for natural gas conversion complex is provided, the method comprising the steps of:
Circulating seawer in the first open cooling circuit;
Described seawater is contacted with heat exchanger with heat absorption;
The seawater that cooling is flowed out from described heat exchanger;
Fresh water circulates in the second closed cooling circuit; And
Described fresh water is contacted to remove the heat in the described fresh water with described heat exchanger.
Said method can further comprise the step of coming the steam in the condensation steam turbine condenser with cooled seawater.
Said method can further comprise the step of carrying out heat exchange with the heat exchanger of cooled fresh water and described natural gas conversion complex.
Said method can further comprise the step of replenishing seawater from the seawater input unit.
Said method can further comprise the step that cooled seawater is turned back to the ocean as discharging.
According to further scheme of the present invention, a kind of cooling device that is used for natural gas conversion complex is provided, this equipment comprises:
The first open cooled with seawater circuit; This cooling circuit comprises: cooling device is used to cool off the seawater that flows out from described heat exchanger; The stram condenser of steam turbine is positioned at after the described cooling device;
Heat exchanger is used to add hot sea water; And
Second closed, fresh cooling circuit contacts with the described heat exchanger that is used for carrying out with cooled seawater heat exchange.
Above-mentioned cooling device can be selected from gravity-flow ventilation (hyperbola) tower, forced draught cooling tower, reverse-flow tower, transverse ventilation tower, or their various modification, and this depends on the cooling water demand of natural gas conversion complex.
Above-mentioned cooling device can comprise the tapping equipment that is used for cooled seawater is turned back to the ocean.
Above-mentioned natural gas conversion complex can be alkene distillation catalytic conversion (CatalyticConversion of Olefins to Distillates, COD), natural gas liquefaction (GTL), Fisher-Tropsch (FT) or methanol production package, or their mixing apparatus.
Description of drawings
Fig. 1 illustrates and is used for the cooling means of natural gas conversion complex and the flow chart of equipment according to the present invention.
The specific embodiment
Referring now to the summary accompanying drawing is Fig. 1, produces the typical case of package by 220t/h GTL and describes the present invention.Fig. 1 illustrates and is used for the cooling means of natural gas conversion complex and the flow chart of equipment according to the present invention.
Now consult Fig. 1, the cooling device that is used for natural gas conversion complex according to the present invention represents briefly that with Ref. No. 10 this cooling device comprises: the first open cooled with seawater circuit 12; Be used to add the heat exchanger 14 of hot sea water; And cooling device, the form of cooling device is a cooling tower 16, is used to cool off the seawater that flows out from heat exchanger 14.Cooling device also comprises and heat-exchangers of the plate type 14 contacted second closed, fresh cooling circuits 18 that are used for carrying out with cooled seawater heat exchange.The first open cooled with seawater circuit 12 also comprises the stram condenser 20 of steam turbine in air separation and the TRT.
Approximately the seawater of 135702t/h is circulated in the first open cooled with seawater circuit 12.Basically need the seawater of about 122357t/h to make steam condensation in the stram condenser 20 of steam turbine in air separation and the TRT.Approximately 13345t/h enters heat-exchangers of the plate type 14 and leaves in the time of 50 ℃ in the time of 35 ℃.Second closed, fresh cooling circuit 18 provides the temperature absorption ability of 14 ℃ (dT) with 14298t/h flow circulation time.
Approximately the seawater of 3635t/h evaporate in cooling tower 16, and the 7270t/h cooling and concentrated after 35 ℃ of seawater return ocean (discharging).In the cycle of concentrating, the enrichment factor of the sea water solution that returns is approximately 1.5.
Evaporation and the seawater that returns are replenished by the seawater of seawater input unit 22 with 10905t/h.Approximately the seawater of 235t/h is delivered to sea water desalting equipment 24, is used for cooling device 10 other local fresh water of natural gas conversion complex with production.
Will be appreciated that:
-to compare with disposable sea water service system, seawater input unit desired volume and cost will significantly reduce.Demand for seawater will reduce to about 11140t/h from about 122357t/h of prior art demand, reduces about 90%;
The design of-prior art wet cooling tower is originated treated FT waste water as a supplement, extra capacity and storage device need be provided in desalting plant, guaranteeing replenishing enough fresh water to tower, thus the imbalance in compensation sewage treatment equipment and/or the FT integration unit.And according to cooling means of the present invention and equipment needs no longer just, because it has replaced cooling tower (evaporation) system of prior art with heat-exchangers of the plate type cooling system (closed system).This its modular design capacity of desalting plant that makes 220t/h GTL produce package reduces to 100t/h;
-according to estimates, can drop to 33 ℃ or lower according to environmental condition according to the chilled(cooling) water supply (CWS) temperature of seawater cooling tower of the present invention.Therefore can obtain the temperature difference more than 15 ℃, this can make required condenser surface amass and/or the cooling water demand reduces;
-reduce for the chilled(cooling) water supply (CWS) temperature of TRT condenser will to make condenser working than under the low vacuum, thus the power of generation and available horsepower are increased;
-lower Yin the seawater supply temperature of giving heat exchanger, can in the design of freshwater system, use the temperature difference more than 14 ℃.Therefore can reduce the required cost of investment of heat exchanger;
-Environmental Law, for example in area, the Persian Gulf, requiring to be discharged into the effluent that receives in the water body can not cause:
Apart from emission point radius 100m place, temperature increases above 3 ℃; And
Apart from emission point radius 200m place, total dissolved solidss (TDS) concentration that receives water body should not increase above 10%.
Utilization is according to cooling means of the present invention and equipment, because the emission of seawater cooling tower from the cold water source of this equipment, does not return the ocean so do not have hot water.If it is under 1.5 the cycling condition that tower is operated in enrichment factor, the concentration of TDS will exceed about 50% in the tower water of discharging than the concentration of TDS in the seawater so.Yet, returning the emission volume of ocean with prior art and compare, emission volume of the present invention is relatively low, and therefore, this can not become problem.
It should be understood that the above example that provides is used to further specify the present invention and helps those skilled in the art to understand the present invention, is to limit zone of reasonableness of the present invention inadequately and never should be interpreted into.
Claims (5)
1. natural gas conversion complex water-cooling method, the method comprising the steps of:
Circulating seawer in the first open cooling circuit;
Described seawater is contacted with the heat exchanger of natural gas conversion complex with heat absorption;
The seawater that cooling is flowed out from described heat exchanger;
Fresh water circulates in the second closed cooling circuit of natural gas conversion complex;
Described fresh water is contacted with described heat exchanger to remove the heat in the described fresh water; And
Make steam condensation in the steam turbine condenser with cooled seawater.
2. method according to claim 1 comprises step: replenish seawater from the seawater input unit.
3. according to each described method of aforementioned claim, comprise step: cooled seawater is returned the sea.
4. natural gas conversion complex cooling device, this equipment comprises:
The first open cooled with seawater circuit, this cooling circuit comprises: cooling device is used to cool off the seawater that flows out from described heat exchanger; The stram condenser of steam turbine is positioned at after the described cooling device;
Heat exchanger is used to add hot sea water; And
Second closed, fresh of natural gas conversion complex cooling circuit contacts with the described heat exchanger that is used for carrying out with cooled seawater heat exchange.
5. equipment according to claim 4, wherein said cooling device is selected from: gravity-flow ventilation hyperbola tower, forced draught cooling tower, reverse-flow tower, transverse ventilation tower, or their various modification.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57355104P | 2004-05-20 | 2004-05-20 | |
| US60/573,551 | 2004-05-20 | ||
| ZA2004/3895 | 2004-05-20 | ||
| US60/655,403 | 2005-02-23 | ||
| ZA2005/1588 | 2005-02-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1993595A CN1993595A (en) | 2007-07-04 |
| CN100520265C true CN100520265C (en) | 2009-07-29 |
Family
ID=38214940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580016161 Expired - Fee Related CN100520265C (en) | 2004-05-20 | 2005-05-17 | Cooling water plant for a natural gas conversion complex |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100520265C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595336A (en) * | 2017-01-20 | 2017-04-26 | 合肥天鹅制冷科技有限公司 | Water-circulating cooling energy-saving equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3414659A1 (en) * | 1984-04-18 | 1985-10-31 | Ulrich Dipl.-Ing. 7500 Karlsruhe Hochberg | Intake operation of cooling towers |
| US5714657A (en) * | 1994-03-11 | 1998-02-03 | Devries; Louis | Natural gas conversion to higher hydrocarbons |
| CN1052053C (en) * | 1993-12-10 | 2000-05-03 | 卡伯特公司 | An improved liquefied natural gas fueled combined cycle power plant |
| JP2001228288A (en) * | 2000-02-14 | 2001-08-24 | Toshiba Corp | Cooling water draining device for plant |
| JP2002221395A (en) * | 2001-01-26 | 2002-08-09 | Ebara Corp | Cooling facility and method for steam condenser |
-
2005
- 2005-05-17 CN CN 200580016161 patent/CN100520265C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3414659A1 (en) * | 1984-04-18 | 1985-10-31 | Ulrich Dipl.-Ing. 7500 Karlsruhe Hochberg | Intake operation of cooling towers |
| CN1052053C (en) * | 1993-12-10 | 2000-05-03 | 卡伯特公司 | An improved liquefied natural gas fueled combined cycle power plant |
| US5714657A (en) * | 1994-03-11 | 1998-02-03 | Devries; Louis | Natural gas conversion to higher hydrocarbons |
| JP2001228288A (en) * | 2000-02-14 | 2001-08-24 | Toshiba Corp | Cooling water draining device for plant |
| JP2002221395A (en) * | 2001-01-26 | 2002-08-09 | Ebara Corp | Cooling facility and method for steam condenser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1993595A (en) | 2007-07-04 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20210517 |
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| CF01 | Termination of patent right due to non-payment of annual fee |