CN112960717A - System for utilize oil field oil well output fluid waste heat to accomplish oil field water distillation and purification - Google Patents
System for utilize oil field oil well output fluid waste heat to accomplish oil field water distillation and purification Download PDFInfo
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- 239000002918 waste heat Substances 0.000 title claims abstract description 35
- 238000000746 purification Methods 0.000 title claims abstract description 21
- 238000004821 distillation Methods 0.000 title claims abstract description 19
- 239000003129 oil well Substances 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 title claims abstract description 16
- 239000002332 oil field water Substances 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 100
- 230000000694 effects Effects 0.000 claims abstract description 67
- 238000001704 evaporation Methods 0.000 claims abstract description 64
- 230000008020 evaporation Effects 0.000 claims abstract description 62
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 14
- 239000010865 sewage Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims 1
- 238000009833 condensation Methods 0.000 abstract description 5
- 230000005494 condensation Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 36
- 239000012153 distilled water Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011552 falling film Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Substances [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/042—Prevention of deposits
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
本发明公开了一种利用油田油井产出液余热完成油田水蒸馏净化的系统，包括依次接通的油井产出液收集储存装置、蒸汽发生装置和多效蒸发装置，且多效蒸发装置的每一效均由一个蒸发器和一个分离器组成；每一效所述蒸发装置的蒸发器管程出口均接通同一效的分离器，用于分离蒸汽；所述分离器还接通下一效蒸发装置的蒸发器壳程，用于提供工作蒸汽；每一效所述蒸发装置的蒸发器管程进口均接通中水水源；最后一效所述蒸发装置的分离器接通有冷凝装置。本发明利用产出液的余热完成中水净化，并将其中蓄含的余热部分回收到注汽锅炉的给水，同时减少了油田中水的排放，具有一定的节能和环保效果。
The invention discloses a system for completing oilfield water distillation and purification by utilizing the waste heat of produced fluid from oil wells in an oilfield, comprising an oil well produced fluid collection and storage device, a steam generation device and a multi-effect evaporation device which are connected in sequence, and each of the multi-effect evaporation devices is connected in sequence. Each effect is composed of an evaporator and a separator; the evaporator tube side outlet of the evaporation device for each effect is connected to a separator of the same effect for separating steam; the separator is also connected to the next effect. The evaporator shell side of the evaporation device is used to provide working steam; the inlet of the evaporator tube side of the evaporation device of each effect is connected to the reclaimed water source; the separator of the evaporation device of the last effect is connected to a condensation device. The invention utilizes the waste heat of the produced liquid to purify the reclaimed water, and recovers the waste heat stored in the waste heat to the feed water of the steam injection boiler, simultaneously reduces the discharge of water in the oil field, and has certain energy saving and environmental protection effects.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection of oil fields, in particular to a water resource recycling technology with low cost.
Background
With the exploitation and utilization of heavy oil and ultra-heavy oil resources in oil fields, various novel thermal recovery technologies are continuously used, for example, saturated dry steam or superheated steam can be used for heating an underground oil layer, so that higher crude oil recovery rate can be obtained. However, as the thermal recovery temperature increases, the temperature of the produced oil well produced liquid increases, which may reach 170 ℃ or even higher, and the produced liquid usually contains a certain proportion of crude oil, and the rest is superheated water. As the water in the pipeline is flashed once the pressure is reduced to the normal pressure, the transportation of the pipeline is difficult, the requirements on the tightness and pressure resistance of the pipeline and equipment along the pipeline are improved, and the cavitation damage of the equipment can be caused when the pipeline is not managed properly. Meanwhile, the produced liquid also contains a large amount of heat energy, and if the heat energy is not utilized, the heat energy is completely dissipated to the environment, so that the energy is wasted.
After the oil field output liquid is treated by the separation process, the crude oil is separated from the oil field output liquid, but the rest water still contains a certain amount of SiO2Ca, Mg, Cl, etc., and contains small amounts of crude oil, known as oilfield water. Currently, known techniques are: 1. directly inject the reclaimed water back to the ground to prevent the pollution caused by large-area discharge. The method has the disadvantages that a large amount of electric energy is consumed by the up-and-down transportation of water, and the gradual pollution of underground water resources is caused in order to supply water to the steam injection boiler and continuously extract new clean underground water resources from the underground. 2. A water treatment plant is established, sewage treatment is carried out by air floatation, dosing and filtration, and the treated water is recycled to a boiler, so that the method can realize the recycling of water resources. However, because the water in the oil field contains a certain amount of organic matters and the temperature often exceeds 80-90 ℃, when the water is treated by adopting the common membrane filtration technology, the membrane can be quickly failed, so that the treatment cost is greatly increased. 3. The purification by evaporation method, at present, there has been a research on the purification by distillation of reclaimed water by repeatedly heating steam by a steam compressor as a heat source for evaporation (MVC method), which consumes a large amount of electric energy to drive the steam compressor, and requires high cost of equipment.
Disclosure of Invention
The invention aims to provide a system for completing distillation and purification of oil field water by utilizing waste heat of produced liquid of an oil field oil well.
In order to achieve the purpose, the invention provides the following technical scheme: a system for completing distillation and purification of oil field water by utilizing waste heat of produced liquid of an oil field oil well comprises an oil well produced liquid collecting and storing device, a steam generating device and a multi-effect evaporation device which are sequentially communicated, wherein each effect of the multi-effect evaporation device consists of an evaporator and a separator;
the tube pass outlet of the evaporator of each evaporator is communicated with a separator with the same effect for separating steam; the separator is also communicated with the shell pass of the evaporator of the next-effect evaporation device and is used for providing working steam; the tube side inlet of the evaporator of each evaporator is communicated with a reclaimed water source;
and the separator of the last effect of the evaporation device is communicated with a condensing device.
The invention also provides an operation method for completing the oil field water distillation purification system by utilizing the waste heat of the produced liquid of the oil field oil well, wherein the high-temperature produced liquid with the temperature of 170-180 ℃ is connected to a steam generating device, the temperature of working steam is controlled to be 110-120 ℃ after heat exchange, and the working steam is introduced into a multi-effect evaporation device;
an evaporator of the multi-effect evaporation device is communicated with a dosing device, and inorganic salts in reclaimed water are prevented from scaling the evaporator after dosing;
while the multi-effect evaporation device successively distills and purifies the water in the oil field, the evaporation temperature of each effect is ensured by changing the vacuum degree of the tube pass of the evaporator, so that a certain vacuum degree gradient is formed between the effects, and the temperature difference of each effect is 5-10 ℃;
connecting the condensing device with the separator of the last-effect evaporation device, so that steam generated by the condensing device is condensed to generate a vacuum gradient required by the system to work, and the continuous work of the system is ensured; the condensing device is a water injection type vacuum pump, water coming from a steam injection boiler at the temperature of about 25 ℃ is used as a cold source, and the water is directly input into the boiler after absorbing the heat of the final effect steam; or the condensing device is an air cooler and condenses the steam generated in the last effect by air cooling;
and a water ring vacuum pump is arranged on the condensing device and is used for sucking non-condensable gas in the condensing system so as to ensure the vacuum degree of each effect of the multi-effect evaporation system.
The last effect of the separator discharges a small amount of highly concentrated sewage, and the sewage is dried by connecting a drying device.
Compared with the prior art, the invention has the beneficial effects that: the steam generation unit, the multiple-effect evaporation unit and the condensation unit form a working system, the waste heat of the high-temperature output liquid of the oil field is used as a heating heat source, the distillation and purification of the water in the oil field are completed, and the distilled water is reused in a boiler, so that the effect of recovering water resources is achieved.
The steam generation unit can adopt a waste heat boiler or a flash tank to generate working steam with the temperature of 110-120 ℃ as a heat source of a subsequent multi-effect evaporation unit. The subsequent multiple-effect evaporation unit is 4 ~ 6 effectsas, and wherein the steam of last effect is with boiler low temperature water or air cooler condensation, produces the vacuum gradient of guaranteeing system work to realize the waste heat recovery effect.
The invention completes the purification of the reclaimed water by utilizing the afterheat of the produced liquid, and partially recycles the afterheat stored in the reclaimed liquid to the feed water of the steam injection boiler, reduces the discharge of the reclaimed water in the oil field, and has certain energy-saving and environment-friendly effects.
Drawings
FIG. 1 is a schematic diagram of the system for distilling and purifying oil field water by using waste heat of produced fluid of an oil field.
FIG. 2 is a schematic diagram of another embodiment of the system for distillation purification of oil field water using waste heat from produced fluids from an oil well.
1. The oil well produced fluid collecting and storing device; 2. a steam generating device; 3. a multi-effect evaporation device; 4. an air cooler; 5. a water jet type vacuum pump; 6. a drying device; 7. a dosing device; 8. a source of recycled water.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a system for completing oil field water distillation purification by utilizing waste heat of produced fluid of an oil field oil well comprises an oil field produced fluid collecting and storing device 1, a steam generating device 2 and a multi-effect evaporation device 3 which are sequentially communicated. Because the temperature of the high-temperature output liquid is only 170-180 ℃, the heat quality is low, and in order to ensure that enough working steam is obtained, the temperature and the pressure of the generated steam cannot be too high, the temperature and the pressure are generally controlled to be 110-120 ℃.
The steam generating device 2 is a waste heat boiler. Working steam is obtained by utilizing a waste heat boiler which can be one of a shell-and-tube evaporator, a spiral plate evaporator or a plate evaporator with compact design, a heat flow medium is oil well output liquid which flows through the equipment in large quantity, the inlet temperature of the heat flow medium is about 170 ℃, and the outlet temperature of the heat flow medium is reduced to 80-100 ℃ to form oil field reclaimed water to be treated; the cold flow medium is cold water of about 25 ℃ led in from a boiler water inlet pipeline, and exchanges heat with the high-temperature produced liquid and evaporates by adopting a countercurrent heat exchange method. By designing the structure and working parameters of the heat exchange unit, the cold fluid can be heated in the waste heat boiler to generate steam with the temperature of more than 110 ℃ and the steam can be used as working steam. The method has the advantage that the working steam comes from clean boiler water, and is very beneficial to preventing the subsequent multi-effect evaporation device 3 from scaling.
The multi-effect evaporation device 3 is an evaporation device with 4-6 effects communicated with each other, and the evaporation device of each effect consists of an evaporator and a separator; the evaporator is one of a central circulating tube type evaporator, a forced circulating tube type evaporator or a falling film type evaporator. Each evaporator and one conjoined or independent separator form one effect of multi-effect evaporation, and in order to ensure that the system can distill and purify enough water in the oil field, so that distilled water is conveniently recovered, the effect is usually 4-6. In the multi-effect evaporation system, the evaporation temperature of each effect is ensured by changing the vacuum degree, a certain vacuum degree gradient is formed between the effects, and the temperature difference of the effects can be 5-10 ℃.
The working steam is communicated with the shell pass of the first effect evaporator, and is converted into distilled water after exchanging heat with water in the oil field to be recycled. The reclaimed water source 8 is communicated with all tube passes of the evaporator, the reclaimed water in the oil field is evaporated in the tube passes of the evaporator after being pretreated to generate secondary steam, the secondary steam is separated by the separator and is used as working steam of the shell pass of the evaporator with the next effect, the evaporation of the reclaimed water is continuously finished, and the rest is done until the last effect is achieved. Distilled water produced by each effect evaporation device and water produced by the air cooler 4 can also be used as cold flow media of the waste heat boiler.
The multi-effect evaporation device is communicated with a condensing device. The condensing equipment is air cooler 4, and air cooler 4 cools off the steam that last effect evaporimeter produced, makes it become the comdenstion water, and after the steam condensation, owing to the volume reduces, just can produce the negative pressure naturally, and the preceding each effect of pulling produces the vacuum gradient, just so can guarantee that the steam of each effect can evaporate in succession. In order to prevent the effect of the non-condensable gas on the vacuum degree, a water ring vacuum pump may be additionally installed on the air cooler 4, so that the non-condensable gas mixed in the steam is pumped out to maintain a certain vacuum degree.
The output end of the last effect of the multi-effect evaporation device 3 is communicated with a drying device 6. These highly concentrated effluents are environmentally polluting and require harmless disposal before discharge. The heating can be continued by using a drying device until the solid is dried and buried.
The tube side inlet of the evaporator of each effect evaporation device is also communicated with a chemical adding device 7 to prevent inorganic salts contained in the reclaimed water from causing the scaling of the multi-effect evaporator, the reclaimed water in the oil field needs to be subjected to water treatment in advance before evaporation, and SiO commonly contained in the reclaimed water in the oil field can be prevented by adding NaOH2Causes silica scale, and can carry out flocculation treatment in advance on water in an oil field in order to prevent Ca and Mg ions from scaling. After the evaporation of the 4-6 effect evaporator, the residual reclaimed water of the last effect can be concentrated by 20-40 times, a continuous sewage discharge pipe is arranged on the last effect separator, and the continuous discharge is equivalent to the first effectThe water amount of the sewage is 3-5% to ensure that the evaporator can not be seriously scaled.
The invention also provides another technical scheme, which is different from the technical scheme that the condensing device is a water injection type vacuum pump 5, and other technical characteristics are unchanged.
The water jet type vacuum pump 5 recovers the waste heat of the last effect. The water with the temperature of about 25 ℃ is used as a cold source, and the cold source directly absorbs the heat of the final effect steam and then inputs the heat into the boiler, so that a special water cooling tower can be avoided from being built, and part of steam heat can be recycled to the steam injection boiler, thereby achieving the energy-saving effect. The steam injection boiler is another common special device in an oil field and is specially used for generating thermal recovery steam injected into the underground.
Referring to fig. 2, the present invention provides another technical solution, which is different from the above technical solution in that the steam generating device is a flash tank, and other technical features are not changed.
The method for obtaining the working steam is to directly introduce the high-temperature output liquid into a flash tank to be flashed to obtain the working steam containing a small amount of light oil, and the temperature of the flash steam can be stabilized at a certain value by controlling the pressure of the flash tank by using a constant-pressure element. In order to ensure the subsequent multi-effect evaporation unit to work successfully, the temperature of the working steam should be ensured to be above 110 ℃. The method has the advantages of simple equipment and small volume.
The steam obtained after flash evaporation is directly introduced into the shell pass of the first effect evaporator, and the produced sewage is used as water in an oil field and communicated with the tube pass of the evaporator.
Examples
The water evaporation system adopts 40t/h high-temperature output liquid as a working heat source in the oil field. The system adopts a waste heat boiler and a multi-effect evaporation process to finish the distillation and purification of water in the oil field.
The maximum height of the shell of the waste heat boiler is 8500mm (with a support), the maximum diameter of the cylinder is 1400mm, and the shell is formed by welding Q345R steel plates with the thickness of 10 mm. The internal heat exchange tube is coiled into a multi-head spiral tube structure by using 62 304 stainless steel tubes with the length of 36 meters, the outer diameter of the tube is phi 25mm, the wall thickness is 2mm, and the total heat exchange area is 174.3m2. In the working process, 1The high-temperature output liquid at 80 ℃ flows through the shell pass and flows in from the upper part of the shell, the flow rate is 40t/h, the temperature is reduced to 120.6 ℃ after heat exchange, and the output liquid flows out from the bottom of the shell. The method is characterized in that evaporation water is introduced from boiler water, the evaporation water is preheated to 80 ℃ at a flow rate of 1.5t/h, flows through a tube pass and is evaporated into steam at 120 ℃ to serve as working steam of a subsequent multi-effect evaporator, a water inlet and a steam outlet of the tube pass are both arranged at the top of a waste heat boiler, and a periodic sewage outlet is also arranged at the bottom of the boiler.
120.6 ℃ produced fluid discharged from the bottom of the waste heat boiler can be used for preheating and heating incoming water, the height of the shell of the heat exchanger is 3500mm, the diameter of the shell of the heat exchanger is 1000mm, and the heat exchanger is formed by welding Q345R steel plates with the thickness of 8 mm. The internal heat exchange tube adopts 2 spiral 304 stainless steel tubes with the length of 126 meters, the outer diameter of the tube is phi 25mm, the wall thickness is 2mm, and the total heat exchange area is 9.85m2. The initial temperature of 1.5t/h incoming water introduced by a boiler water pipeline is 25 ℃, the incoming water flows through the tube pass of the heat exchanger and is preheated to 80 ℃, and the incoming water is directly input into a water inlet pipe of the waste heat boiler. And the produced liquid with the flow rate of 40t/h and the temperature of 120.6 ℃ flowing into the heat exchanger is introduced from a bottom pipeline of the waste heat boiler, the temperature is reduced to 114.2 ℃ after heat exchange, and the produced liquid is conveyed to a subsequent oil-water separation system through an output pipeline.
The following table shows the various ion concentrations of water in an oil field that needs to be evaporated for a multi-effect system:
TABLE 1 attached hereto various ion concentrations mg/L of water in oil field
The water supply of the 1.5t/h working steam generated by the waste heat boiler comes from a boiler water system and is led into a subsequent multi-effect evaporation system to finish the distillation and purification of water in an oil field. The multi-effect evaporation system is a 4-effect evaporator, the first 2 effects adopt falling film evaporators, the second 2 effects adopt central circulating tube evaporators, the evaporation capacity of each effect is designed according to 1.5t./h, and the heat exchange area of the evaporators is 60-70 m2。
In the working process of the system, working steam is generated in the waste heat boiler, and the steam yield is 1.5t/h and is used as the working steam of the system. This vapor is converted to distilled water in the single effect evaporator shell pass and recovered. And the water in the oil field is chemically pretreated by water. Is evaporated in the tube pass of the first-effect evaporator to generate 1.5t/h secondary steam which is used as working steam of the second-effect evaporator to continuously finish the evaporation of the reclaimed water. The design working temperature of the 4-effect evaporator is 120 ℃, 90 ℃, 80 ℃ and 70 ℃, the distillation purification of water in an oil field at 5.775t/h can be completed, the yield of the obtained distilled water is 7.275t/h together with the 1.5t/h evaporation capacity generated by the waste heat boiler. The sewage discharge amount of the system is 225kg/h, and the highly concentrated sewage needs to be subjected to harmless treatment and then is discharged.
The final effect steam condensation of the system is completed by a water jet type vacuum pump and an air cooler together, and a water ring type vacuum pump is additionally arranged to adjust and guarantee the vacuum degree of each effect.
The conductivity of the distilled water obtained from the water in the oil field is 14-38 mu S/cm, but the content of organic matters in the distilled water is greatly influenced by the original water sample, the value of Chemical Oxygen Demand (COD) fluctuates within the range of 30-130 mg/L, and the water supply index of the steam injection boiler in the oil field can be completely met.
Claims (6)
1. The utility model provides a system for utilize oil field oil well output fluid waste heat to accomplish oil field water distillation and purification which characterized in that: the device comprises an oil well produced liquid collecting and storing device (1), a steam generating device (2) and a multi-effect evaporation device (3) which are sequentially communicated, wherein each effect of the multi-effect evaporation device (3) consists of an evaporator and a separator;
the tube pass outlet of the evaporator of each evaporator is communicated with a separator with the same effect for separating steam; the separator is also communicated with the shell pass of the evaporator of the next-effect evaporation device and is used for providing working steam; the tube side inlet of the evaporator of each effect of the evaporation device is communicated with a reclaimed water source (8);
and the separator of the last effect of the evaporation device is communicated with a condensing device.
2. The system for completing oil field water distillation purification by utilizing waste heat of produced fluid of oil field oil well according to claim 1, characterized in that: the effect number of the multi-effect evaporation device (3) is 4-6.
3. The system for completing oil field water distillation purification by utilizing waste heat of produced fluid of oil field oil well according to claim 1, characterized in that: the condensing device is an air cooler (4), and the input end of the air cooler (4) is communicated with a separator of the last effect of the evaporating device and is used for condensing steam generated by the last effect;
or the condensing device is a water-jet vacuum pump (5), and the water-jet vacuum pump (5) is communicated with a separator of the last effect evaporation device and is used for recovering steam heat to a steam-injection boiler;
and the condensing device is provided with a water ring vacuum pump for pumping non-condensable gas in the condensing system.
4. The system for completing oil field water distillation purification by utilizing waste heat of produced fluid of oil field oil well according to claim 1, characterized in that: the separator of the last effect of the evaporation device is also communicated with a drying device (6);
the tube side inlet of the evaporator of each effect of the evaporation device is also communicated with a dosing device (7).
5. The system for completing oil field water distillation purification by utilizing waste heat of produced fluid of oil field oil well according to claim 1, characterized in that: the steam generating device (2) is a waste heat boiler;
or the steam generating device (2) is a flash tank.
6. A method of operating a system for distillation purification of oil field water according to claim 1, comprising: introducing the high-temperature output liquid with the temperature of 170-180 ℃ into a steam generating device (2), controlling the temperature of working steam to be 110-120 ℃ after heat exchange, and introducing the working steam into a multi-effect evaporation device (3);
an evaporator of the multi-effect evaporation device (3) is communicated with a dosing device (7), and inorganic salts in the reclaimed water are prevented from scaling the evaporator after dosing;
while the multi-effect evaporation device (3) successively distills and purifies the water in the oil field, the evaporation temperature of each effect is ensured by changing the vacuum degree of the tube pass of the evaporator, so that a certain vacuum degree gradient is formed between the effects, and the temperature difference of each effect is 5-10 ℃;
connecting the condensing device with the separator of the last-effect evaporation device, so that steam generated by the condensing device is condensed to generate a vacuum gradient required by the system to work, and the continuous work of the system is ensured; the condensing device is a water injection type vacuum pump (5), incoming water at the temperature of about 25 ℃ of the steam injection boiler is used as a cold source, and the incoming water directly absorbs the heat of the final-effect steam and then is input into the boiler; or the condensing device is an air cooler (4) and condenses the steam generated in the last effect by air cooling;
the condensing device is provided with a water ring vacuum pump for sucking non-condensable gas in the condensing system so as to ensure the vacuum degree of each effect of the multi-effect evaporation system;
the last effect of the separator discharges a small amount of highly concentrated sewage which is dried by connecting a drying device (6).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477338A (en) * | 2021-12-31 | 2022-05-13 | 西安本清化学技术有限公司 | System and method for treating sewage by using waste heat of oilfield produced liquid |
| CN114482927A (en) * | 2021-12-31 | 2022-05-13 | 西安本清化学技术有限公司 | A system and method for green and low-carbon development of heavy oil |
| CN115991511A (en) * | 2022-08-22 | 2023-04-21 | 南京林业大学 | A new downstream double-effect evaporation and concentration device for high-salt organic wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130264185A1 (en) * | 2012-04-04 | 2013-10-10 | Alfredo B. Brillantes, JR. | Method and Means of Production Water Desalination |
| US20140008208A1 (en) * | 2012-07-05 | 2014-01-09 | Garry Pichach | Thermal system and process for producing steam from oilfield produced water |
| CN104030381A (en) * | 2014-06-18 | 2014-09-10 | 西安交通大学 | System and method for preparing steam-injection boiler feed water by utilizing waste heat of ground of oilfield |
| CN209242715U (en) * | 2018-11-20 | 2019-08-13 | 连云港市华能电力辅机有限公司 | It is a kind of to prepare pure water system using waste heat multi-effect distilling |
-
2021
- 2021-04-29 CN CN202110473772.7A patent/CN112960717A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130264185A1 (en) * | 2012-04-04 | 2013-10-10 | Alfredo B. Brillantes, JR. | Method and Means of Production Water Desalination |
| US20140008208A1 (en) * | 2012-07-05 | 2014-01-09 | Garry Pichach | Thermal system and process for producing steam from oilfield produced water |
| CN104030381A (en) * | 2014-06-18 | 2014-09-10 | 西安交通大学 | System and method for preparing steam-injection boiler feed water by utilizing waste heat of ground of oilfield |
| CN209242715U (en) * | 2018-11-20 | 2019-08-13 | 连云港市华能电力辅机有限公司 | It is a kind of to prepare pure water system using waste heat multi-effect distilling |
Non-Patent Citations (2)
| Title |
|---|
| 国家食品药品监督管理局药品认证管理中心: "《厂房设施与设备：药品GMP指南》", 31 August 2011, 中国医药科技出版社 * |
| 陈晓勤等: "《页岩气开发地面工程》", 30 September 2016, 华东理工大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477338A (en) * | 2021-12-31 | 2022-05-13 | 西安本清化学技术有限公司 | System and method for treating sewage by using waste heat of oilfield produced liquid |
| CN114482927A (en) * | 2021-12-31 | 2022-05-13 | 西安本清化学技术有限公司 | A system and method for green and low-carbon development of heavy oil |
| CN114482927B (en) * | 2021-12-31 | 2024-06-07 | 西安本清化学技术有限公司 | A green and low-carbon development system and method for heavy oil |
| CN115991511A (en) * | 2022-08-22 | 2023-04-21 | 南京林业大学 | A new downstream double-effect evaporation and concentration device for high-salt organic wastewater |
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