CN1226628A - Technology for frozen separating liquid by chemical displacement - Google Patents
Technology for frozen separating liquid by chemical displacement Download PDFInfo
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- CN1226628A CN1226628A CN 98111864 CN98111864A CN1226628A CN 1226628 A CN1226628 A CN 1226628A CN 98111864 CN98111864 CN 98111864 CN 98111864 A CN98111864 A CN 98111864A CN 1226628 A CN1226628 A CN 1226628A
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- crude oil
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- chemical displacement
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Abstract
A freezing separation technique for produced liquid containing crude oil includes dewatering, desalting, demulsifying crude oil and separating with chemical displacing agent. The container full of the produced liquid containing crude oil is put in low-temp environment. The different components contained in the produced liquid become solid or liquid at a certain temp as they have different physical properties such as setting points and specific weights, so needed substances can be separated out.
Description
The present invention relates to a kind of isolation technics, particularly in the oil exploitation industry crude oil and extraction liquid are carried out dewatering and desalting, the isolation technics of crude oil demulsification and chemical displacing agent.
By prior art as can be known, in water flood recovery and chemical flooding intensified oil reduction, the crude oil of extraction must carry out dewatering and desalting, breakdown of emulsion and separation chemistry displacing agent, otherwise bring significant problem can for carried of crude oil, refining.Usually the dehydration of crude oil desalination process that adopts has: (1) deposition dehydrating desalination process, comprise gravitational settling and heating sedimentation, gravitational settling mainly is to utilize the density variation of oil and salt-containing solution to carry out the sedimentation differentiation, and the heating sedimentation is to promote this differentiation under heating condition; (2) chemical dehydration desalination is to add a certain amount of particular chemical agent in the crude oil mixed system of salt-containing solution, allows chemical agent and brine composition effect, the difference of some rerum natura between increase salt solution and crude oil, thus reach the purpose of dewatering and desalting; (3) electric dehydration desalination comprises electrical heating method and electromagnetic field effect method; (4) centrifugal dehydration desalination, the crude oil system of the brackish water difference of specific gravity because of crude oil and salt solution in supercentrifuge is carried out dewatering and desalting; (5) solid phase contact dewatering and desalting because crude oil is different in the compatibility on solid matter surface when contacting with some solid matter with salt-containing solution, thereby reaches the purpose of separating and dehydrating desalination.Crude oil demulsification is the key link of dewatering and desalting and separation chemistry displacing agent, and present breaking method has (1) chemical demulsification method, is to add demulsifier in the crude oil one water one salt one chemical displacing agent system of emulsification, destroys oil/water termination, reaches the purpose of breakdown of emulsion; (2) electric demulsification method adopts the concussion of electrical heating or electromagnetism to destroy oil/water termination, and sets up high voltage electric field, promotes the homophase of oil and water to assemble, and utilizes natural subsidence, reaches the purpose of separation.
In the above-mentioned breaking method, chemical demulsification method is comparatively successful, has been that use in Duo Jia oil company or oil field; The electromagnetism concussion is successful to crude oil system (being less than 100 milliliters) seldom at laboratory experiment, but also can not to heavy dose.Also powerless as for separation to the chemical displacing agent of chemical flooding produced liquid, this present Research has seriously hindered the continuation development of chemical flooding intensified oil reduction, the chemical flooding intensified oil reduction will continue to develop the dehydration that must at first solve crude oil, the mask work of breakdown of emulsion and chemical displacing agent.
For traditional dehydration of crude oil desalination process, the breaking method biggest advantage is accepted by users, and done a lot of research in these areas, the operation present situation is comparatively good, but dehydration, the breakdown of emulsion of crude oil one water one chemical displacing agent system in these conventional methods and the chemical displacing agent process studied, the separation method of chemistry displacing agent, following limitation is arranged: (1) must consume a large amount of artificial energy sources, accounts for the 25%-40% of crude refining total amount loss as the energy loss of this link of the dehydration of crude oil; (2) most also necessary certain chemical agents that add, as demulsifier, demulsifier must be through complicated artificial synthesizing; (3) the treatment process measure is very complicated, just comprise the separation buffer device as Daqing oil field crude oil two stage dewatering technologies, grug feeding jar, dosing pump, oil transfer pump, heating furnace, deposition dehydrating surge tank, dehydration pump, heating furnace, electric dehydrator, surge tank, 11 links such as defeated machine outward, the multistage dosing that has is just more complicated; (4) demulsifier can only disposablely use, and the chemical agent in the chemical flooding also can only disposablely use, and appurtenance also can destroy ecological environment.Therefore, the separation method to the salt in the crude oil of extraction, water, chemical displacing agent is necessary in the improvement prior art.
The objective of the invention is in order to overcome the shortcoming of prior art, a kind of more economic and effective chemical flooding produced liquid isolation technics is provided.
For achieving the above object, the solution of the present invention is: a kind of method of isolating chemical flooding produced liquid from crude oil, comprise that container with splendid attire crude oil extraction liquid places the environment of low temperature, the physical characteristic of various materials such as freezing point in the based on crude, the difference of proportion etc. and under the uniform temperature condition, form solid-state or liquid, thereby isolate required material.
In such scheme, freezing condition can be that nature forms, and also can be artificial formation.
Above-mentioned freeze and separate method is a based on crude, water, the physical characteristic of chemistry displacing agent system, comprise different freezing points, proportion, and the salt component, the compatibility of chemical displacing agent and crude water is different and propose, and wherein the freezing point of crude oil is minimum, chemistry displacing agent system belongs to water-soluble system, can be affine fully with water, the freezing point of its freezing point and water is suitable, is higher than the freezing point of oil far away, in general, the former oil freezing point of each elephant of China is all lower, all is lower than subzero 50 ℃, and subzero 10 ℃ the time, water and chemical displacing agent system become solid-state already, and crude oil still is in flow regime, and the proportion of chemical displacing agent aqueous systems is higher than the proportion of crude oil, and gravitational differentiation takes place in natural cooling process, make crude oil and water, chemistry displacing agent etc. far apart separates, and this is a separation method that is different from prior art.
Below in conjunction with embodiment scheme is described in more detail:
Fig. 1 is the elevation of knockout tower;
The container of the illustrated knockout tower of some as splendid attire crude oil extraction liquid is set at the scene, oil field, knockout tower comprises knockout drum main body (1), fluid input port, top (2), evaporated on top window (3), side fluid outlet (4), fluid visual window (5), and bottom water body floss hole (6), implement the solution of the present invention and can utilize natural low temperature northerly winter, can directly enter knockout tower from the extraction liquid of producing well, profit just can be well-separated during in subzero several years when temperature, and the crude oil of come-up can enter another knockout tower by pipeline to be separated once more, just can export refining after reaching requirement.
If in the season of having a moderate climate, around the knockout drum or inside artificial low-temperature receiver is set, also can reach same effect.
Adopt above-mentioned freezing method dewatering and desalting; breakdown of emulsion; the separation chemistry displacing agent has many advantages; wide accommodation at first, Chinese most of oil field winter temperature is low, can save a large amount of energy and manpower; the cryogenic freezing isolation technics can not change the component and the character of crude oil in certain temperature range; isolated chemical displacing agent can thaw once more, reuses, therefore to preserving the ecological environment and increased economic efficiency immeasurable value.
In sum, the solution of the present invention is successful.
Claims (5)
1, a kind of technology for frozen separating liquid by chemical displacement, to crude oil extraction liquid dewater, desalination, crude oil demulsification and chemical displacing agent separate, it is characterized in that: the environment that the container of splendid attire crude oil extraction liquid is placed low temperature, the difference of the physical characteristic of various materials such as freezing point, proportion etc. in the based on crude extraction liquid and under the uniform temperature condition, form solid-state or liquid, thereby isolate required material.
2, technology for frozen separating liquid by chemical displacement according to claim 1 is characterized in that: described low temperature environment belongs to natural low temperature.
3, technology for frozen separating liquid by chemical displacement according to claim 1 is characterized in that: described low temperature environment belongs to the artificial hypothermia.
4, technology for frozen separating liquid by chemical displacement according to claim 1 is characterized in that: described container is a knockout tower.
5, technology for frozen separating liquid by chemical displacement according to claim 4, it is characterized in that: knockout tower comprises knockout drum main body (1), fluid input port, top (2), evaporated on top window (3), side fluid outlet (4), fluid visual window (5) and bottom water body floss hole (6) etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98111864 CN1226628A (en) | 1998-02-20 | 1998-02-20 | Technology for frozen separating liquid by chemical displacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98111864 CN1226628A (en) | 1998-02-20 | 1998-02-20 | Technology for frozen separating liquid by chemical displacement |
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| Publication Number | Publication Date |
|---|---|
| CN1226628A true CN1226628A (en) | 1999-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98111864 Pending CN1226628A (en) | 1998-02-20 | 1998-02-20 | Technology for frozen separating liquid by chemical displacement |
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| CN (1) | CN1226628A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986924A (en) * | 2015-08-03 | 2015-10-21 | 富阳鸿祥技术服务有限公司 | Industrial waste-water treating system for paper making factory |
| CN105152450A (en) * | 2015-08-18 | 2015-12-16 | 杭州启澄科技有限公司 | Physical pretreatment system for paper mill wastewater |
| CN113618966A (en) * | 2021-08-30 | 2021-11-09 | 陕西师范大学 | Method for separating micro plastic and biochar |
-
1998
- 1998-02-20 CN CN 98111864 patent/CN1226628A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986924A (en) * | 2015-08-03 | 2015-10-21 | 富阳鸿祥技术服务有限公司 | Industrial waste-water treating system for paper making factory |
| CN104986924B (en) * | 2015-08-03 | 2018-10-19 | 杭州富阳鸿祥技术服务有限公司 | A kind of processing system of papermaking factory production waste water |
| CN105152450A (en) * | 2015-08-18 | 2015-12-16 | 杭州启澄科技有限公司 | Physical pretreatment system for paper mill wastewater |
| CN105152450B (en) * | 2015-08-18 | 2019-11-22 | 杭州绿一环保技术有限公司 | A kind of physically pretreatment system of waste water of paper mill |
| CN113618966A (en) * | 2021-08-30 | 2021-11-09 | 陕西师范大学 | Method for separating micro plastic and biochar |
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