CN103968365B - Method and device for generating superheated steam for water supply of high-salt boiler by sectional evaporation - Google Patents
Method and device for generating superheated steam for water supply of high-salt boiler by sectional evaporation Download PDFInfo
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- CN103968365B CN103968365B CN201310034853.2A CN201310034853A CN103968365B CN 103968365 B CN103968365 B CN 103968365B CN 201310034853 A CN201310034853 A CN 201310034853A CN 103968365 B CN103968365 B CN 103968365B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000001704 evaporation Methods 0.000 title claims abstract description 43
- 230000008020 evaporation Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 158
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 6
- 235000014171 carbonated beverage Nutrition 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010612 desalination reaction Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 8
- 239000010865 sewage Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000001174 ascending effect Effects 0.000 abstract 2
- 238000004064 recycling Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 8
- 239000002351 wastewater Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 208000035404 Autolysis Diseases 0.000 description 1
- 206010057248 Cell death Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000028043 self proteolysis Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
A method and a device for generating superheated steam of feed water of a high-salt boiler by sectional evaporation belong to the technical field of boiler equipment. The generation method comprises the following steps: the boiler steam drum is divided into a clean section and a salt section; the lower part of the salt section cyclone cylinder is connected with a salt section for sewage discharge; the bottom end of the salt section cyclone cylinder is connected with a salt section descending pipe, the salt section descending pipe is connected with a salt section distribution header, the other end of the salt section ascending pipe is connected with the middle part of the salt section cyclone cylinder, the upper cavity of the salt section cyclone cylinder is connected with a corrugated plate, the top of the salt section cyclone cylinder is connected with a salt section steam outlet, and the salt section steam outlet is connected with a pipeline at one end of a superheater; the net section distribution header is connected with a net section ascending pipe; the salt section communicating pipe is communicated with the clean section steam pocket and the salt section cyclone. The beneficial effects are that: on the premise of ensuring the steam quality, the requirement on the salt content of the boiler water of the thickened oil thermal recovery boiler is greatly reduced, the moderately treated thickened oil produced water can be recycled, the recycling of the development water quantity of the thickened oil is realized, the clear water consumption and the sewage discharge are reduced, the environment is protected, and the operation cost of thickened oil thermal recovery is reduced.
Description
Technical field
The present invention relates to high salt boiler feedwater superheated steam production method and the device of stage evaporation, belong to boiler plant technical field.
Background technology
In recent years, along with the increasingly in short supply of petroleum resources and price is surging, the exploitation of viscous crude more and more paid attention to by oil circle.For improving viscous crude temperature, reducing its viscosity, make viscous crude easily extraction from oil reservoir, the way adopting high-temperature high-pressure steam of annotating in oil reservoir is the major measure that viscous crude is produced.Thickened oil recovery is by dense oil extraction wastewaters a large amount of for association, recovered water salt content is large, complicated component, temperature is higher, is back to injection boiler and makes it to recycle after condensed oil sewage is carried out reasonable sanding, can greatly save clear water resource, reduction dense oil extraction wastewater arranges the impact on environment outward, and effectively utilizes the heat of recycle-water.Salinity is still more than 3000mg/L after treatment for dense oil extraction wastewater, and salt content is far above the requirement of boiler feed quality standard GB/T12145, and according to raw water quality standard, salinity is greater than 1000mg/L and just belongs to high-concentrated saline water.When heavy crude heat extraction boiler adopts high-concentrated saline water as boiler feedwater, pot water salt content is high, causes steam salt content higher than the salt content requirement of plain cylindrical furnace steam quality, should not heat further make it overheated to steam, thus the steam of more high parameter cannot be produced, limit the efficiency of thickened oil recovery.
For by dense oil extraction wastewater circulating and recovering, while guarantee Safety of Superheater, improve steam quality, produce superheated steam to improve thickened oil recovery efficiency, need the salt content in reduction steam.Salinity in steam comprises the salt content of water entrained by steam and the salt amount of steam autolysis, and in general, the fundamental way reducing steam salt content is the moisture controlling pot water salt content and remove in steam.In Natural Circulation process, because pot water constantly circulates, the salinity that steam carries out is limited, a pot water salt content is caused to greatly increase, and the way reducing pot water salt content comprises increase blowdown rate and stage evaporation, for reducing salt section steam salt content further, the external way of salt section is also adopted to improve stage evaporation effect.
China Patent Publication No.: CN101979917A, provides one " the Natural Circulation injection boiler being feedwater with high saliferous demineralized water and water circulation method ", belongs to Natural Circulation drum hydrodynamic force technology and stage evaporation technical field.Drum is divided into clean section and salt section, and boiler feedwater directly introduced in the clean section vertical downcomer tube of drum, clean section evaporating heating surface is arranged in furnace heating surface.The feedwater of drum salt section is provided by clean section boiler water, and salt section evaporating heating surface is arranged in boiler back end ductwork, and sewer is directly drawn by boiler salt section water separator.
Summary of the invention
The object of the invention is: high salt boiler feedwater superheated steam production method and device that a kind of stage evaporation is provided, utilize high salt boiler feedwater to produce superheated steam simultaneously, the water resource of high salinity can be made full use of, be beneficial to dense oil extraction wastewater circulating and recovering, improve steam quality, thus improve thickened oil recovery efficiency.
The technical solution used in the present invention is:
The high salt boiler feedwater superheated steam generation device of stage evaporation, boiler-steam dome is divided into clean section and salt section; The bottom of salt section cyclone cylinder connects the blowdown of salt section; The bottom of salt section cyclone cylinder connects salt section down-comer, and salt section down-comer connects salt section and distributes header, and salt section is distributed header and connected salt section tedge, and the other end of salt section tedge connects the middle part of salt section cyclone cylinder;
The upper chamber of salt section cyclone cylinder connects corrugated plating, and the top of salt section cyclone cylinder connects salt section steam (vapor) outlet, and salt section steam (vapor) outlet connects one end pipeline of superheater;
The bottom of clean section drum connects clean section down-comer, and clean section down-comer connects clean section and distributes header, and clean section is distributed header and connected clean section tedge, and the other end of clean section tedge connects the middle part of clean section drum,
Have steam cleaner to connect in the cavity of clean section drum, one end of economizer connects steam cleaner,
The top of clean section drum connects drum fairlead, and drum fairlead connects the other end of superheater;
Be communicated with clean section drum and salt section cyclone cylinder salt section communicating pipe.
The high salt boiler feedwater superheated steam production method of stage evaporation, comprises the steps:
High salt boiler feedwater steam cleaner introduced in clean section drum after economizer heating carries out cleaning desalination to clean section steam;
Then, distribute header through clean section down-comer and clean section, enter clean section tedge generation steam water interface and pass back into clean section drum; Participate in clean section water circulation;
Steam water interface is separated into clean section steam and pot water in clean section drum, delivers to superheater heating and produce superheated steam after clean section steam cleans in steam cleaner;
Pot water by causing clean section and salt section communicating pipe salt section cyclone cylinder as clean section blowdown, then enters salt section tedge generation steam water interface through salt section down-comer and salt section distribution header and passes back into salt section cyclone cylinder;
Steam in steam water interface carries out drawing after carbonated drink separation mixing with superheater superheated steam out through corrugated sheet, thus produces superheated steam;
The blowdown of salt section accounts for 5% ~ 15% of total evaporation; Salt section evaporation capacity accounts for 10% ~ 30% of total evaporation, and clean section evaporation capacity accounts for 70% ~ 90% of total evaporation.
Beneficial effect of the present invention:
1) stage evaporation technology effective reduces clean section pot water salt content, and boiler feedwater is cleaned the steam that clean section produces, and reduces the salt content of clean section steam further;
2) salt section steam salt content is higher, avoids its directly overheated a large amount of precipitations preventing salinity in steam;
3) salt section is external can be separated with steam containing salt pan water more efficiently to height;
4), after clean section steam superheating, with salt section steam, final steam is superheated steam, substantially increases steam parameter, thus improves thickened oil recovery efficiency.
Under the prerequisite ensureing steam quality, greatly reduce the requirement of pot water salt content, reuse can carry out the condensed oil sewage after reasonable sanding in a large number, greatly saving clear water resource, protects environment, reduces the operating cost of heavy crude heat extraction.Thermal recovery boiler can produce superheated steam, and calorific value and the steam quality of steam are improved.
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 the high salt boiler feedwater superheated steam generation device schematic diagram of stage evaporation.
Detailed description of the invention
Embodiment 1: consult Fig. 1, the high salt boiler feedwater superheated steam generation device of stage evaporation, mainly comprises economizer 1, steam cleaner 2, drum fairlead 3, superheater 4, salt section communicating pipe 5, salt section steam (vapor) outlet 6, corrugated plating 7, salt section cyclone cylinder 8, salt section tedge 9, salt section blowdown 10, salt section down-comer 11, salt section distributes header 12, clean section down-comer 13, only section distribute header 14, only section tedge 15 and clean section drum 16.
The bottom of salt section cyclone cylinder 8 connects salt section blowdown 10; The bottom of salt section cyclone cylinder 8 connects salt section down-comer 11, and salt section down-comer 11 connects salt section and distributes header 12, and salt section is distributed header 12 and connected salt section tedge 9, and the other end of salt section tedge 9 connects the middle part of salt section cyclone cylinder 8,
The upper chamber of salt section cyclone cylinder 8 connects corrugated plating 7, and the top of salt section cyclone cylinder 8 connects salt section steam (vapor) outlet 6, and salt section steam (vapor) outlet 6 connects one end pipeline of superheater 4;
The bottom of clean section drum 16 connects clean section down-comer 13, and clean section down-comer 13 connects clean section and distributes header 14, and clean section is distributed header 14 and connected clean section tedge 15, and the other end of clean section tedge 15 connects the middle part of clean section drum 16,
Have steam cleaner 2 to connect in the cavity of clean section drum 16, one end of economizer 1 connects steam cleaner 2,
The top of clean section drum 16 connects drum fairlead 3, and drum fairlead 3 connects the other end of superheater 4;
Be communicated with clean section drum 16 and salt section cyclone cylinder 8 salt section communicating pipe 5.
Clean section steam is after cleaning, and salt content reduces greatly, is introduced after superheater 4 heats producing superheated steam by drum fairlead 3.
The feedwater of salt section is clean section sewer, clean section sewer is by after entering clean section and salt section communicating pipe 5 salt section cyclone cylinder 8, distribute header 12 through salt section down-comer 11 and salt section and enter salt section tedge 9, and produce low mass dryness fraction steam water interface and pass back into cyclone cylinder 8, the steam produced is after cyclone cylinder outlet corrugated plating 7 carries out carbonated drink separation, drawn by salt section cyclone cylinder steam (vapor) outlet 6, the superheated steam of coming with superheater 4 mixes and produces superheated steam; The high salt pan water that contains carries out blowdown by salt section blowdown 10.
The blowdown of salt section accounts for 5% ~ 15% of evaporation capacity, and salt section evaporation capacity accounts for 10% ~ 30% of total evaporation, and clean section evaporation capacity accounts for 70% ~ 90% of total evaporation.
The high salt boiler feedwater superheated steam production method of stage evaporation, mainly comprises economizer, clean section drum, be arranged on the steam cleaner in clean section drum, superheater, clean section and salt section communicating pipe, salt section cyclone cylinder, be arranged on the corrugated plating in salt section cyclone cylinder, salt section tedge, salt section down-comer, salt section distributes header, clean section down-comer, clean section distributes header, clean section tedge.
Comprise the steps: that high salt boiler feedwater steam cleaner introduced in clean section drum after economizer heating cleans clean section steam;
Then enter clean section tedge generation steam water interface through clean section down-comer and clean section distribution header and pass back into clean section drum;
Steam water interface is separated into clean section steam and pot water in clean section drum, delivers to superheater heating and produce superheated steam after clean section steam cleans in steam cleaner;
Pot water by causing clean section and salt section communicating pipe salt section cyclone cylinder as clean section blowdown, then enters salt section tedge generation steam water interface through salt section down-comer and salt section distribution header and passes back into salt section cyclone cylinder;
Steam in steam water interface carries out drawing after carbonated drink separation mixing with superheater superheated steam out through corrugated sheet, thus produces superheated steam;
The blowdown of salt section accounts for 5% ~ 15% of total evaporation; Salt section evaporation capacity accounts for 10% ~ 30% of total evaporation, and clean section evaporation capacity accounts for 70% ~ 90% of total evaporation.
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 (2)
1. a high salt boiler feedwater superheated steam generation device for stage evaporation, is characterized in that: boiler-steam dome is divided into clean section and salt section; The bottom of salt section cyclone cylinder connects the blowdown of salt section; The bottom of salt section cyclone cylinder connects salt section down-comer, and salt section down-comer connects salt section and distributes header, and salt section is distributed header and connected salt section tedge, and the other end of salt section tedge connects the middle part of salt section cyclone cylinder;
The upper chamber of salt section cyclone cylinder connects corrugated plating, and the top of salt section cyclone cylinder connects salt section steam (vapor) outlet, and salt section steam (vapor) outlet connects one end pipeline of superheater;
The bottom of clean section drum connects clean section down-comer, and clean section down-comer connects clean section and distributes header, and clean section is distributed header and connected clean section tedge, and the other end of clean section tedge connects the middle part of clean section drum,
Have steam cleaner to connect in the cavity of clean section drum, one end of economizer connects steam cleaner,
The top of clean section drum connects drum fairlead, and drum fairlead connects the other end of superheater, and drum fairlead produces superheated steam after introducing superheater heating;
The blowdown of salt section accounts for 5% ~ 15% of evaporation capacity, and salt section evaporation capacity accounts for 10% ~ 30% of total evaporation, and clean section evaporation capacity accounts for 70% ~ 90% of total evaporation;
Be communicated with clean section drum and salt section cyclone cylinder salt section communicating pipe.
2. the high salt boiler feedwater superheated steam production method of stage evaporation, is characterized in that comprising the steps:
High salt boiler feedwater steam cleaner introduced in clean section drum after economizer heating carries out cleaning desalination to clean section steam;
Then, distribute header through clean section down-comer and clean section, enter clean section tedge generation steam water interface and pass back into clean section drum; Participate in clean section water circulation;
Steam water interface is separated into clean section steam and pot water in clean section drum, delivers to superheater heating and produce superheated steam after clean section steam cleans in steam cleaner;
Pot water by causing clean section and salt section communicating pipe salt section cyclone cylinder as clean section blowdown, then enters salt section tedge generation steam water interface through salt section down-comer and salt section distribution header and passes back into salt section cyclone cylinder;
Steam in steam water interface carries out drawing after carbonated drink separation mixing with superheater superheated steam out through corrugated sheet, thus produces superheated steam;
The blowdown of salt section accounts for 5% ~ 15% of total evaporation; Salt section evaporation capacity accounts for 10% ~ 30% of total evaporation, and clean section evaporation capacity accounts for 70% ~ 90% of total evaporation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310034853.2A CN103968365B (en) | 2013-01-30 | 2013-01-30 | Method and device for generating superheated steam for water supply of high-salt boiler by sectional evaporation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310034853.2A CN103968365B (en) | 2013-01-30 | 2013-01-30 | Method and device for generating superheated steam for water supply of high-salt boiler by sectional evaporation |
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| Publication Number | Publication Date |
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| CN103968365A CN103968365A (en) | 2014-08-06 |
| CN103968365B true CN103968365B (en) | 2016-02-10 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3739752A (en) * | 1971-08-25 | 1973-06-19 | Combustion Eng | Boiler drum structure for rapid temperature changes |
| JP2007232238A (en) * | 2006-02-28 | 2007-09-13 | Mesco Inc | Boiler system |
| CN101979917A (en) * | 2010-11-09 | 2011-02-23 | 清华大学 | Natural circulating steam injection boiler fed with high salt-containing softened water and water circulating method |
| CN203177148U (en) * | 2013-01-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Sectional evaporation type superheated steam generator for water supply of high-salt boiler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9518731B2 (en) * | 2011-03-23 | 2016-12-13 | General Electric Technology Gmbh | Method and configuration to reduce fatigue in steam drums |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3739752A (en) * | 1971-08-25 | 1973-06-19 | Combustion Eng | Boiler drum structure for rapid temperature changes |
| JP2007232238A (en) * | 2006-02-28 | 2007-09-13 | Mesco Inc | Boiler system |
| CN101979917A (en) * | 2010-11-09 | 2011-02-23 | 清华大学 | Natural circulating steam injection boiler fed with high salt-containing softened water and water circulating method |
| CN203177148U (en) * | 2013-01-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Sectional evaporation type superheated steam generator for water supply of high-salt boiler |
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