CN104214763B - A kind of preparation method of saliferous saturated vapor and device thereof - Google Patents
A kind of preparation method of saliferous saturated vapor and device thereof Download PDFInfo
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- CN104214763B CN104214763B CN201310220283.6A CN201310220283A CN104214763B CN 104214763 B CN104214763 B CN 104214763B CN 201310220283 A CN201310220283 A CN 201310220283A CN 104214763 B CN104214763 B CN 104214763B
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Abstract
A kind of preparation method of saliferous saturated vapor and device thereof, boiler is connected with main steam valve with the steam (vapor) outlet of steamdrum, boiler is connected with steam by-pass valve by steam by-pass with the steam (vapor) outlet of steamdrum, be connected with main steam pipe behind one end of the other end connection branch road steam valve of main steam valve, the other end of main steam pipe is connected with the entrance of superheater; The other end of branch road steam valve connects superheater entrance branch road, and boiler is connected superheater entrance branch road with the water inlet of steamdrum, and the other end of steam by-pass valve is connected with the other end of superheater outlet valve; Feedwater piping is connected with superheater entrance branch road by threeway; Be connected with connecting pipeline between the outlet line of economizer and the outlet line of superheater, connecting pipeline is connected with connection valve, the outlet line of economizer connects economizer exit valve.Beneficial effect of the present invention: saliferous saturated vapor is overheated, improves steam quality, thus substantially increase heavy crude heat extraction efficiency.
Description
Technical field
The present invention relates to a kind of preparation method and device thereof of saliferous saturated vapor, belong to the preparing technical field of superheated steam.
Background technology
Abundant viscous crude resource is contained in China, for by thickened oil recovery out, needs to inject high-temperature high-pressure overheat steam in oil field to reduce Viscosity of Heavy Crude Oil.The injection boiler of generation superheated steam is the special equipment for viscous crude heat extraction by steam injection, after the steam that injection boiler produces notes underground heating viscous crude, is together plucked out of with viscous crude, utilizes through water-oil separating, sewage disposal Posterior circle.Because injection boiler water mostly is high saliferous demineralized water, salinity is more than 3000mg/L, salt content is far above the requirement of boiler feed quality standard GB/T12145, therefore cause superheated steam salt content higher than the salt content requirement of plain cylindrical furnace steam quality, should not heat further steam and make it overheated.Current China oil field many employings saturated vapor carries out heavy crude heat extraction, and saturated vapor parameter is under pressure restriction, and temperature is difficult to further raising.Saturated vapor is due to reasons such as band water, a large amount of salinity can be carried, superheated steam is produced according to superheater, salinity in steam can be made to separate out in a large number, cause superheater to block and heat transfer deterioration occurs, even cause the accidents such as booster, thus have a strong impact on the normal operation of injection boiler, therefore regularly must carry out desalination to superheater.
On the one hand, adopt high parameter superheated steam can greatly improve thickened oil recovery efficiency, reduce energy resource consumption; On the other hand, the restriction of water resource forces again injection boiler that the demineralized water of high saliferous must be adopted as boiler feedwater.In this case, in the urgent need to a kind of steam superheating system and method for saliferous saturated vapor, effectively can remove the salinity in superheater tube, ensure safe operation of the boiler, can high temperature super heated steam be produced again, improve thickened oil recovery efficiency.
China Patent Publication No.: CN201412821, provides " a kind of superheated steam injection boiler of the not desalination of feeding water ", is applied to oil field gas injection and recovers the oil.Feature is: on the top of evaporation heating facial canal and with evaporation heating facial canal export be connected have collector, be fixed with steamdrum at stove coping.Be furnished with water separator in steamdrum, between water separator and collector, be connected with carbonated drink fairlead.Down-comer is connected with between water separator and distribution header.Be connected with steam guiding tube at the vapor outlet of water separator, and connect superheater.Be connected with feed pipe at water separator and connect economizer.Superheater, economizer and air preheater are fixed in the flue of boiler.Effect is: adopt carbonated drink natural circulation structure, adopt lowly require water quality (feedwater is not except salt), produce superheated steam to be that oil field gas injection is used, boiler feedwater treatment facility cost, Water purification operating cost are saved, improve the heat entrained by steam injection, thus improve well recovery efficiency.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of preparation method and device thereof of saliferous saturated vapor.It is overheated to carry out high saliferous saturated vapor, can make full use of the water resource of high salinity, be beneficial to condensed oil sewage circulating and recovering, improve steam quality, improves thickened oil recovery efficiency.
A kind of preparation facilities of saliferous saturated vapor, the steam (vapor) outlet of steamdrum is connected with main steam valve, the steam (vapor) outlet of steamdrum is connected with steam by-pass valve by steam by-pass, be connected with main steam pipe behind one end of the other end connection branch road steam valve of main steam valve, the other end of main steam pipe is connected with the entrance of superheater; The other end of branch road steam valve connects superheater entrance branch road, and the water inlet of steamdrum connects superheater entrance branch road;
The outlet of superheater be connected with superheater outlet valve and be communicated with valve;
The other end of steam by-pass valve is connected with the other end of superheater outlet valve;
Feedwater piping is connected with superheater entrance branch road by threeway;
Connecting pipeline is connected with between the outlet line of economizer and the outlet line of superheater, connecting pipeline is connected with connection valve, the outlet line of economizer connects economizer exit valve, and the other end of economizer exit valve is connected with the water inlet of steamdrum by feedwater piping.
The bore scope of superheater is between 40 ~ 80mm, and the bore scope of economizer is between 20 ~ 60mm.
A preparation method for saliferous saturated vapor, comprises and carries out salification step that is overheated and that remove in superheater to saliferous saturated vapor; Also comprise:
Steps A, when carrying out overheated to saliferous saturated vapor, steam off bypass valve, closes superheater entrance branch road valve, and closes the connection valve between superheater and economizer; Open main steam valve, open superheater outlet valve, and open economizer exit valve; Boiler feedwater to be introduced in boiler by feedwater piping and is participated in water circulation and produces saliferous saturated vapor after economizer preheating; Saliferous saturated vapor is drawn from steamdrum outlet, and saliferous saturated vapor is delivered to superheater heating through main steam pipe and produced superheated steam;
Step B, after when production, superheated steam runs a period of time, salification can be produced in superheater tube, for ensureing that Safety of Superheater runs, when needing to remove the salification in superheater tube, open steam by-pass valve, open superheater entrance branch road valve, and the connection valve opened between superheater and economizer, close main steam inlet valve, close superheater outlet valve, and close economizer exit valve; Boiler feedwater introduces superheater by the connecting pipeline between superheater and economizer after economizer preheating, and boiler feedwater is introduced participation water circulation in boiler by main steam pipe, superheater entrance branch road and supply line again and produced saliferous saturated vapor; Saliferous saturated vapor is drawn from the outlet of steamdrum, delivers to side, the downstream pipeline of superheater outlet valve through steam by-pass; Boiler feedwater carries out desalination through superheater to superheater.
Steps A and step B alternate run, thus interval carries out desalination to superheater, produces superheated steam continuously.
Superheater should be arranged in flue-gas temperature be less than 750 DEG C by heat space.In this temperature range, superheater is mainly based on heat convection, and heat transfer intensity is lower, and this can be avoided due to the too high and problem such as cause that the too high and steam salinity of tube wall temperature is separated out in a large number of flue-gas temperature, when boiler feedwater is cleaned superheater, salt is analysed in evaporation in a large number of also can avoiding feeding water.Be convenient in addition safeguard and maintenance.
Beneficial effect of the present invention:
1) utilize boiler feedwater to clean superheater under boiler normally runs, avoid the frequent stop and start of boiler, save fuel, reduce operating cost;
2) superheater obtains regular cleaning, reduces salification in superheater, while guarantee Safety of Superheater, reduces the requirement of boiler feedwater salt content, is conducive to the effluent cycle recycling that viscous crude is separated;
3) saliferous saturated vapor is overheated, improves steam quality, thus substantially increases heavy crude heat extraction efficiency.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can understand the present invention better and easily learn wherein many adjoint advantages, but accompanying drawing described herein is used to provide a further understanding of the present invention, form a part of the present invention, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention, as schemed wherein:
Fig. 1 is structural representation of the present invention.
Below in conjunction with drawings and Examples, the present invention is further described.
Detailed description of the invention
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present invention belong to protection scope of the present invention.
Embodiment 1: as shown in Figure 1, comprises steamdrum 1, main steam valve 2, superheater entrance branch road 3, branch road steam valve 4, steam by-pass 5, main steam pipe 6, steam by-pass valve 7, superheater 8, superheater outlet valve 9, economizer 10, is communicated with valve 11, connecting pipeline 12, economizer exit valve 13 and feedwater piping 14.
A kind of preparation facilities of saliferous saturated vapor, the steam (vapor) outlet of steamdrum 1 is connected with main steam valve 2, the steam (vapor) outlet of steamdrum 1 is connected with steam by-pass valve 7 by steam by-pass 5, be connected with main steam pipe 6 behind one end of the other end connection branch road steam valve 4 of main steam valve 2, the other end of main steam pipe 6 is connected with the entrance of superheater 8; The other end of branch road steam valve 4 connects superheater entrance branch road 3, and the water inlet of steamdrum 1 connects superheater entrance branch road 3;
The outlet of superheater 8 is connected with superheater outlet valve 9 and is communicated with valve 11;
The other end of steam by-pass valve 7 is connected with the other end of superheater outlet valve 9;
Feedwater piping 14 is connected with superheater entrance branch road 3 by threeway;
Connecting pipeline 12 is connected with between the outlet line of economizer 10 and the outlet line of superheater 8, connecting pipeline 12 is connected with and is communicated with valve 11, the outlet line of economizer 10 connects economizer exit valve 13, and the other end of economizer exit valve 13 is connected with the water inlet of steamdrum 1 by feedwater piping 14.
The bore 50mm of superheater 8, the bore 30mm of economizer 10.
The preparation method of saliferous saturated vapor, comprises and carries out salification that is overheated and that remove in superheater 8 to saliferous saturated vapor;
Steps A, when carrying out overheated to saliferous saturated vapor, steam off bypass valve 7, closes superheater entrance branch road valve 4, and closes the connection valve 11 between superheater 8 and economizer 10; Open main steam valve 2, open superheater outlet valve 9, and open economizer exit valve 13; Boiler feedwater to be introduced in boiler by feedwater piping 14 and is participated in water circulation and produces saliferous saturated vapor after economizer 10 preheating; Saliferous saturated vapor is drawn from steamdrum outlet, and saliferous saturated vapor is delivered to superheater 8 through main steam pipe 6 and heated generation superheated steam.
Step B, when production superheated steam run after, superheater 8 can produce salification in managing, for ensureing superheater 8 safe operation, when needing to remove the salification in superheater 8 pipe, open steam by-pass valve 7, open superheater entrance branch road valve 4, and the connection valve 11 opened between superheater 8 and economizer 10, close main steam inlet valve 2, close superheater outlet valve 9, and close economizer exit valve 13; Boiler feedwater introduces superheater 8 by the connecting pipeline 12 between superheater 8 and economizer 10 after economizer 10 preheating, and boiler feedwater is introduced in boiler by main steam pipe 6, superheater entrance branch road 3 and supply line 14 and participated in water circulation production saliferous saturated vapor; Saliferous saturated vapor is drawn from the outlet of steamdrum 1, delivers to side, the downstream pipeline of superheater 8 outlet superheat device outlet valve 9 through steam by-pass 5.Boiler feedwater carries out desalination to superheater 8 when superheater 8.
Steps A and step B alternate run, thus interval carries out desalination to superheater 8, produces superheated steam continuously.
As mentioned above, embodiments of the invention are explained, but as long as do not depart from inventive point of the present invention in fact and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation is also all included within protection scope of the present invention.
Claims (3)
1. the preparation facilities of a saliferous saturated vapor, it is characterized in that the steam (vapor) outlet of steamdrum is connected with main steam valve, the steam (vapor) outlet of steamdrum is connected with steam by-pass valve by steam by-pass, be connected with main steam pipe behind one end of the other end connection branch road steam valve of main steam valve, the other end of main steam pipe is connected with the entrance of superheater; The other end of branch road steam valve connects superheater entrance branch road, and the water inlet of steamdrum connects superheater entrance branch road;
The outlet of superheater be connected with superheater outlet valve and be communicated with valve;
The other end of steam by-pass valve is connected with the other end of superheater outlet valve;
Feedwater piping is connected with superheater entrance branch road by threeway;
Connecting pipeline is connected with between the outlet line of economizer and the outlet line of superheater, connecting pipeline is connected with connection valve, the outlet line of economizer connects economizer exit valve, and the other end of economizer exit valve is connected with the water inlet of steamdrum by feedwater piping; The bore scope of superheater is between 40 ~ 80mm, and the bore scope of economizer is between 20 ~ 60mm.
2. a preparation method for saliferous saturated vapor, is characterized in that comprising and carries out salification step that is overheated and that remove in superheater to saliferous saturated vapor;
Also comprise:
Steps A, when carrying out overheated to saliferous saturated vapor, steam off bypass valve, closes superheater entrance branch road valve, and closes the connection valve between superheater and economizer; Open main steam valve, open superheater outlet valve, and open economizer exit valve; Boiler feedwater to be introduced in boiler by feedwater piping and is participated in water circulation and produces saliferous saturated vapor after economizer preheating; Saliferous saturated vapor is drawn from steamdrum outlet, and saliferous saturated vapor is delivered to superheater heating through main steam pipe and produced superheated steam;
Step B, after when production, superheated steam runs a period of time, salification can be produced in superheater tube, for ensureing that Safety of Superheater runs, when needing to remove the salification in superheater tube, open steam by-pass valve, open superheater entrance branch road valve, and the connection valve opened between superheater and economizer, close main steam inlet valve, close superheater outlet valve, and close economizer exit valve; Boiler feedwater introduces superheater by the connecting pipeline between superheater and economizer after economizer preheating, and boiler feedwater is introduced participation water circulation in boiler by main steam pipe, superheater entrance branch road and supply line again and produced saliferous saturated vapor; Saliferous saturated vapor is drawn from the outlet of steamdrum, delivers to side, the downstream pipeline of superheater outlet valve through steam by-pass; Boiler feedwater carries out desalination through superheater to superheater.
3. the preparation method of a kind of saliferous saturated vapor according to claim 2, is characterized in that steps A and step B alternate run, thus interval carries out desalination to superheater, produces superheated steam continuously;
Superheater be arranged in flue-gas temperature be less than 750 DEG C by heat space; In this temperature range, superheater is mainly based on heat convection, and heat transfer intensity is lower, avoids because flue-gas temperature is too high and cause the too high and steam salinity of tube wall temperature to separate out in a large number, when boiler feedwater is cleaned superheater, salt is analysed in evaporation in a large number of also can avoiding feeding water.
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| CN201310220283.6A CN104214763B (en) | 2013-06-05 | 2013-06-05 | A kind of preparation method of saliferous saturated vapor and device thereof |
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| CN201310220283.6A CN104214763B (en) | 2013-06-05 | 2013-06-05 | A kind of preparation method of saliferous saturated vapor and device thereof |
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| CN104214763B true CN104214763B (en) | 2016-03-09 |
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| JP2005214546A (en) * | 2004-01-30 | 2005-08-11 | Kurita Engineering Co Ltd | Cleaning method of steam pipe and the like |
| JP2008101856A (en) * | 2006-10-19 | 2008-05-01 | Nippon Steel Engineering Co Ltd | Operation method of boiler superheater in waste treatment facility, and boiler superheater of waste treatment facility |
| CN201141592Y (en) * | 2007-12-14 | 2008-10-29 | 朱海博 | Superheated steam generator and high-pressure desalting machine |
| CN101298911A (en) * | 2008-07-04 | 2008-11-05 | 中国石油天然气第八建设有限公司 | Overheat steam injection boiler |
| CN101551097A (en) * | 2009-05-11 | 2009-10-07 | 辽河石油勘探局 | Steam-injection boiler used for producing high-dryness superheated steam |
| CN203323108U (en) * | 2013-06-05 | 2013-12-04 | 中国石油天然气股份有限公司 | Device for preparing salt saturated steam |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214546A (en) * | 2004-01-30 | 2005-08-11 | Kurita Engineering Co Ltd | Cleaning method of steam pipe and the like |
| JP2008101856A (en) * | 2006-10-19 | 2008-05-01 | Nippon Steel Engineering Co Ltd | Operation method of boiler superheater in waste treatment facility, and boiler superheater of waste treatment facility |
| CN201141592Y (en) * | 2007-12-14 | 2008-10-29 | 朱海博 | Superheated steam generator and high-pressure desalting machine |
| CN101298911A (en) * | 2008-07-04 | 2008-11-05 | 中国石油天然气第八建设有限公司 | Overheat steam injection boiler |
| CN101551097A (en) * | 2009-05-11 | 2009-10-07 | 辽河石油勘探局 | Steam-injection boiler used for producing high-dryness superheated steam |
| CN203323108U (en) * | 2013-06-05 | 2013-12-04 | 中国石油天然气股份有限公司 | Device for preparing salt saturated steam |
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