CN102621284B - Evaluation simulator for corrosion and scaling of steam-driven boiler by polymer-containing oilfield produced water - Google Patents
Evaluation simulator for corrosion and scaling of steam-driven boiler by polymer-containing oilfield produced water Download PDFInfo
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- CN102621284B CN102621284B CN201210042929.1A CN201210042929A CN102621284B CN 102621284 B CN102621284 B CN 102621284B CN 201210042929 A CN201210042929 A CN 201210042929A CN 102621284 B CN102621284 B CN 102621284B
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Abstract
The invention relates to an evaluation simulator for corrosion and scaling of a steam-driven boiler by polymer-containing oilfield produced water, which comprises a diaphragm plunger booster pump (1). The evaluation simulator is characterized in that the diaphragm plunger booster pump (1) is communicated with a pressure buffer tank (2) which is communicated with a high-temperature heating furnace (3), a hanger cavity (4) is arranged in the high-temperature heating furnace (3), and a relief valve (5) and an emptying valve (6) are arranged on a pipeline at the tail end of the high-temperature heating furnace (3). The evaluation simulator simulates interior conditions of the steam-driven boiler, and corrosion and scaling conditions of the steam-driven boiler by polymer-containing oilfield produced water are evaluated according to the corrosion and scaling conditions of a boiler steel hanger in the simulated environment so as to determine a technical limit of influences of polymer content on corrosion and scaling of steam-driven boiler.
Description
Technical field
After the feedwater that the present invention relates to as steam flood boiler enters steam flood boiler, to the simulating-estimating device of the burn into constructional aspect of steam flood boiler inner wall, especially for containing the feedwater of polymer produced water as steam flood boiler to the simulating-estimating device of the corrosion and scaling situation of steam flood boiler.
Background technology
Steam flooding technology be heavy crude reservoir after cyclic steam stimulation, improve further the main thermal recovery stage of oil recovery factor, adopt steam driving exploitation to expand swept volume, thus improve oil displacement efficiency, reach and improve ultimate recovery factor object.The feedwater of steam flood boiler uses the freshwater resources through sofening treatment or the water drive recovered water through sofening treatment mostly.For the oil field extracted water through postpolymer flood, whether can be applied as the feedwater of steam flood boiler after sofening treatment, at present also in exploration.
Oil field shows containing the site test of poly-recovered water sewage plant, recovered water is gathered for through containing of advanced treating, again through the sofening treatment of Weak-acid cation exchange resin, the requirement that water outlet can reach " the recovered water injection boiler water quality standard of tap water " (SY/T0097-2000).But standard does not make requirement to the polymer content in water, namely need to polymer content in water to steam flood boiler corrosion and scaling situation make evaluation.
Summary of the invention
The object of the present invention is to provide a kind of containing gathering recovered water to steam flood boiler corrosion and fouling Simulation device, the small-sized High Temperature High Pressure (370 DEG C of the present invention, 21MPa) the situation of the inside of unit simulation steam flood boiler, contain poly-recovered water to the corrosion and scaling situation of steam flood boiler with the corrosion and scaling status evaluation of boiler steel lacing film in this simulated environment, determine the technical limits of the content of polymkeric substance to steam flood boiler corrosion, scale effect.
The technical solution used in the present invention is: should comprise diaphragm plunger supercharge pump containing poly-recovered water to steam flood boiler corrosion and fouling Simulation device, described diaphragm plunger supercharge pump is connected with pressure surge tank, pressure surge tank is connected with high-temperature heater, be provided with lacing film chamber in high-temperature heater, the pipeline of high-temperature heater end is provided with blowdown valve and atmospheric valve.
Test method is:
(1) boiler steel lacing film two panels being measured weight and surface area is positioned in lacing film cavity, tight-closed.
(2) open heating furnace, to make in heating furnace temperature stabilization at 370 DEG C, to ensure that the lacing film cavity temperature in stove is 370 DEG C.
(3) test water is pressed into pressure surge tank by diaphragm plunger supercharge pump, opens blowdown valve, and adjust flux makes discharge control, at 1L/h, to observe tensimeter simultaneously, makes the pressure in cavity remain on 21MPa.
(4) according to test needs, determine to test duration.Test complete, after stove to be heated and lacing film chamber cool completely, take out lacing film, calculate the corrosion and scaling situation of lacing film.
The invention has the beneficial effects as follows: the small-sized High Temperature High Pressure (370 DEG C of the present invention, 21MPa) the situation of the inside of unit simulation steam flood boiler, contain poly-recovered water to the corrosion and scaling situation of steam flood boiler with the corrosion and scaling status evaluation of boiler steel lacing film in this simulated environment, determine the technical limits of the content of polymkeric substance to steam flood boiler corrosion, scale effect.Can replace entering steam flood boiler containing poly-recovered water and carry out site test, save experimentation cost.
The present invention, except evaluating containing gathering recovered water to except the corrosion and scaling impact of steam flood boiler, also may be used for the corrosion and scaling effect appraise of other various water quality to steam flood boiler.
accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation in lacing film chamber in Fig. 1.
1, diaphragm plunger supercharge pump; 2, pressure surge tank; 3, high-temperature heater; 4, lacing film chamber; 5, blowdown valve; 6, atmospheric valve; 7, left joint; 8, steam (vapor) outlet; 9, right connector; 10, steel pipe; 11, asbestos washer; 12, steam inlet.
embodiment:
Below in conjunction with embodiment, the invention will be further described:
Diaphragm plunger supercharge pump 1 should be comprised to steam flood boiler corrosion and fouling Simulation device containing poly-recovered water, diaphragm plunger supercharge pump 1 will be pressurized to 21MPa containing poly-recovered water, described diaphragm plunger supercharge pump 1 is connected with pressure surge tank 2, pressure surge tank 2 is connected with high-temperature heater 3, be provided with lacing film chamber 4 in high-temperature heater 3, the pipeline of high-temperature heater 3 end is provided with blowdown valve 5 and atmospheric valve 6.Lacing film chamber 4 comprises left and right joint (7,9), left and right joint (7,9) is respectively equipped with steam import and export (6,8), be threaded between left and right joint (7,9) steel pipe 10, steel pipe 10 inwall is circumferentially provided with asbestos washer 11, lacing film is positioned on asbestos washer 11, should place mat asbestos bed course between two panels lacing film, with eliminate between metal lacing film contact.
Embodiment one: use water as what carry out testing with this test unit using without certain station degree of depth water outlet softening and through softening, not softening test water hardness is 92.1mg/L, test water hardness after softening is 0.1mg/L, and polymer content is 23.9mg/L, carries out contrast test.Respectively carry out the test of continuous 24h with this test unit, result is: not softening is 0.034mm/a containing polywater to the corrosion speed of boiler steel, and scale velocity is 3.582mm/a; After softening is 0.104mm/a containing polywater to the corrosion speed of boiler steel, and scale velocity is 0.038mm/a.Not softening is very serious containing the fouling on boiler steel surface under polywater high-temperature and high-pressure conditions.
Embodiment two: containing of preparation variable concentrations gathers softening water, the actual content of configuration post-consumer polymer is 23.9 mg/L, 68 mg/L, 102 mg/L, 132 mg/L, 171mg/L, using the softening water of different polymer content as testing with water of carrying out testing with this test unit.Result shows: be increased to 171mg/L with polymer content in softening water from 23.9mg/L, and the boiler steel lacing film year scale velocity of simulation steam flood boiler inner wall is that rising becomes; Be increased to 171mg/L with polymer content in softening water from 23.9mg/L, the boiler steel lacing film year corrosion speed of simulation steam flood boiler inner wall is on a declining curve.During polymer concentration < 80mg/L, year scale velocity < 0.5mm, the year scale velocity meeting steam flood boiler is less than the empirical value of 5mm.
Claims (1)
1. one kind contains poly-recovered water to steam flood boiler corrosion and fouling Simulation device, comprise diaphragm plunger supercharge pump (1), it is characterized in that: described diaphragm plunger supercharge pump (1) is connected with pressure surge tank (2), pressure surge tank (2) is connected with high-temperature heater (3), be provided with lacing film chamber (4) in high-temperature heater (3), the pipeline of high-temperature heater (3) end is provided with blowdown valve (5) and atmospheric valve (6); Described lacing film chamber (4) comprises left and right joint (7,9), left and right joint (7,9) is respectively equipped with steam import and export (12,8), be threaded between left and right joint (7,9) steel pipe (10), and steel pipe (10) inwall is circumferentially provided with asbestos washer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210042929.1A CN102621284B (en) | 2012-02-24 | 2012-02-24 | Evaluation simulator for corrosion and scaling of steam-driven boiler by polymer-containing oilfield produced water |
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| CN201210042929.1A CN102621284B (en) | 2012-02-24 | 2012-02-24 | Evaluation simulator for corrosion and scaling of steam-driven boiler by polymer-containing oilfield produced water |
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| CN102621284A CN102621284A (en) | 2012-08-01 |
| CN102621284B true CN102621284B (en) | 2015-01-28 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104237455B (en) * | 2013-06-18 | 2017-09-08 | 中国石油天然气股份有限公司 | Flue Gas Expander Fouling in Fcc Unit is predicted and evaluation of anti-scale experimental facilities |
| CN104267147A (en) * | 2014-09-02 | 2015-01-07 | 中国石油天然气股份有限公司 | Simulation device for evaluating deposition characteristic of polymer in oil field polymer-containing produced water heating furnace |
| CN104515836B (en) * | 2014-11-03 | 2017-04-05 | 中国石油天然气集团公司 | A kind of method and device of test tubing anti-scaling paraffin precipitation performance |
| CN106556549B (en) * | 2016-10-28 | 2019-07-19 | 中国石油化工股份有限公司 | A kind of method and apparatus of oil plant air-distillation column overhead scaling rate test |
| CN107167489A (en) * | 2017-04-20 | 2017-09-15 | 中国石油天然气股份有限公司 | A kind of oil-containing solids discarded object harmless treatment test method and device |
| CN108732304A (en) * | 2018-04-12 | 2018-11-02 | 西南石油大学 | A kind of non-metallic pipe pipe water delivery dynamic scale formation experiment circuit and method |
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| US20050183969A1 (en) * | 2004-02-20 | 2005-08-25 | Luopa Douglas R. | Corrosion Monitor |
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| CN102346114A (en) * | 2010-07-30 | 2012-02-08 | 中国科学院金属研究所 | Corrosion fatigue test apparatus with high temperature and high pressure circulating water |
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| JPH09105768A (en) * | 1995-10-12 | 1997-04-22 | Sony Corp | Hygrothermal tester |
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| CN1547032A (en) * | 2003-12-04 | 2004-11-17 | 天津化工研究设计院 | Boiler water treatment medicament performance evaluation device |
| US20050183969A1 (en) * | 2004-02-20 | 2005-08-25 | Luopa Douglas R. | Corrosion Monitor |
| CN201540240U (en) * | 2009-11-03 | 2010-08-04 | 中国石油化工股份有限公司 | Industrial environment high-temperature high-flow-rate corrosion dynamic simulated experimental device |
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