CN108412567B - Oil field height Wen Cai goes out liquid waste heat recovery and power generation system - Google Patents
Oil field height Wen Cai goes out liquid waste heat recovery and power generation system Download PDFInfo
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- CN108412567B CN108412567B CN201810220406.9A CN201810220406A CN108412567B CN 108412567 B CN108412567 B CN 108412567B CN 201810220406 A CN201810220406 A CN 201810220406A CN 108412567 B CN108412567 B CN 108412567B
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- 238000010248 power generation Methods 0.000 title claims abstract description 89
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 239000010808 liquid waste Substances 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 65
- 239000002912 waste gas Substances 0.000 claims abstract description 61
- 239000002699 waste material Substances 0.000 claims abstract description 32
- 239000002918 waste heat Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 154
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 145
- 239000007921 spray Substances 0.000 claims description 84
- 238000005507 spraying Methods 0.000 claims description 19
- 239000000498 cooling water Substances 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 6
- 230000006837 decompression Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 18
- 238000000926 separation method Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 91
- 239000012530 fluid Substances 0.000 description 15
- 239000003129 oil well Substances 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000003912 environmental pollution Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000012223 aqueous fraction Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
- F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
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Abstract
The invention belongs to the technical field of petroleum exploitation, and particularly relates to a waste heat recovery and power generation system for a high Wen Cai liquid outlet of an oil field. The system carries out high-pressure and normal-pressure two-stage separation on the high Wen Cai liquid of the oil field, respectively recovers the oil-containing waste gas of the oil field with different pressures and temperatures separated by the two-stage separation, and respectively couples condensate liquid with different temperatures formed by different temperatures and energy levels of the recovered oil-containing waste gas of the oil field with a high-temperature ORC power generation system and a low-temperature ORC power generation system to carry out two-stage power generation. Through the technical scheme, the technical problems of pollution and heat waste caused by directly discharging generated oily waste steam into an atmosphere layer in the cooling and depressurization treatment process of the high Wen Cai liquid of the oil field in the prior art are solved, and the technical effects of purifying the oily waste steam of the oil field and improving the heat energy utilization rate of the oily waste steam of the oil field are achieved.
Description
Technical Field
The invention relates to the technical field of petroleum exploitation, in particular to a waste heat recovery and power generation system for a high Wen Cai liquid outlet of an oil field.
Background
The world thick oil resources are extremely rich, the geological reserves of the world thick oil resources far exceed the reserves of the conventional crude oil, and the thick oil reserves of China have the seventh place in the world.
At present, a thermal recovery mode is generally adopted for thick oil recovery, and the thick oil heating viscosity reduction mechanism, the oil layer thermoelastic energy release oil displacement mechanism and the dilution and miscible flooding effects generated by distillation, cracking and emulsification of steam on thick oil are utilized, so that the seepage capability of the thick oil is improved by injecting a large amount of steam into stratum crude oil, and the industrial recovery of the thick oil is realized.
However, the inventors found that, in daily work, the following disadvantages exist in the prior art:
in the thick oil thermal recovery process, the temperature of the oil well produced liquid is higher and the pressure is higher. When the waste gas is conveyed to the ground, the waste gas is required to be subjected to cooling and depressurization, a large amount of flash steam is generated due to pressure reduction and is discharged into the air through outlets at the upper parts of the vapor phase buffer tank and the liquid phase buffer tank respectively, and the waste gas contains a small amount of oil drops and a small amount of noncondensable gas, so that the waste gas not only causes environmental pollution, wastes heat energy, but also wastes oil and gas resources.
Disclosure of Invention
The embodiment of the invention provides an oil field high Wen Cai liquid waste heat recovery and power generation system, which solves the technical problems of pollution and heat waste caused by directly discharging generated oil field oily waste steam into an atmosphere layer in the cooling and depressurization treatment process of the oil field high Wen Cai liquid in the prior art, and achieves the technical effects of purifying the oil field oily waste steam, and carrying out gradient utilization on the heat according to the temperature and energy level of the oil field oily waste steam, thereby improving the heat utilization rate of the oil field oily waste steam.
The embodiment of the application provides an oilfield high Wen Cai effluent waste heat recovery and power generation system, which comprises: a high pressure separator connected to the well, said high pressure separator obtaining a high Wen Cai effluent from said well, separating said Gao Wencai effluent into a medium temperature produced liquid and a high temperature oily waste gas; a high Wen Penlin tower, the high temperature spray tower is connected with the high pressure separator, the high temperature spray tower obtains high temperature oil-containing waste gas from the high pressure separator, carries out cold and heat exchange on the high temperature oil-containing waste gas to form high temperature condensate and separates high temperature non-condensable gas; the high-temperature booster water pump is respectively connected with the high-temperature spray tower and the high-temperature heat exchanger, obtains high-temperature condensate from the high-temperature spray tower and conveys the high-temperature condensate to the high-temperature heat exchanger; the high-temperature heat exchanger is respectively connected with the high-temperature booster water pump and the buffer tank, obtains high-temperature condensate from the high-temperature booster water pump, and performs cold-heat exchange on the high-temperature condensate and the high-temperature ORC power generation system organic working medium to form high-temperature high-pressure organic working medium gas and cooled condensate; the buffer tank is respectively connected with the high-temperature heat exchanger, the oil-water separator and the high-temperature circulating water pump, and the buffer tank stores the cooled condensate; the high-temperature circulating water pump is respectively connected with the high-temperature spray tower and the buffer tank, and is used for obtaining the cooled condensate from the buffer tank and conveying the cooled condensate to the high-temperature spray tower; the high-pressure expansion machine is connected with the high-temperature heat exchanger, obtains high-temperature high-pressure organic working medium gas from the high-temperature heat exchanger, and applies work to the high-temperature high-pressure organic working medium gas to form low-temperature low-pressure organic working medium gas; a high voltage generator connected to the high voltage expander, the high voltage generator obtaining work from the high voltage expander and converting the work into electricity; the high-temperature ORC power generation system cooler is connected with the high-pressure expander, obtains low-temperature low-pressure organic working medium gas from the high-pressure expander, and cools the low-temperature low-pressure organic working medium gas to form low-temperature low-pressure organic working medium liquid; the high-pressure working medium pump is connected with the high-temperature ORC power generation system cooler and the high-temperature heat exchanger, obtains low-temperature low-pressure organic working medium liquid from the high-pressure ORC power generation system cooler, and conveys the low-temperature low-pressure organic working medium liquid to the high-temperature heat exchanger; the low-pressure separator is connected with the high-pressure separator, and the low-pressure separator obtains medium-temperature produced liquid from the high-pressure separator and separates the medium-temperature produced liquid into low-temperature produced liquid and low-temperature oil-containing waste gas; the low Wen Penlin tower is respectively connected with the low-pressure separator and the high-temperature spray tower, the low Wen Penlin tower obtains low-temperature oil-containing waste gas from the low-pressure separator and high-temperature non-condensable gas from the high-temperature spray tower, and performs cold and heat exchange on the low-temperature oil-containing waste gas and the high-temperature non-condensable gas to form low-temperature condensate and separate the low-temperature non-condensable gas; the low-temperature booster pump is respectively connected with the low Wen Penlin tower and the oil-water separator, obtains low-temperature condensate from the low Wen Penlin tower and conveys the low-temperature condensate to the oil-water separator; the oil-water separator is connected with the low-temperature booster pump and the buffer tank, and is used for obtaining low-temperature condensate from the low-temperature booster pump and the cooled condensate from the buffer tank, mixing the low-temperature condensate and the cooled condensate into mixed condensate, and separating the mixed condensate into an oil part and a water part; the low-temperature circulating water pump is respectively connected with the oil-water separator and the low-temperature heat exchanger, obtains most of the water part from the oil-water separator and conveys most of the water part to the low-temperature heat exchanger; the low-temperature heat exchanger is connected with the oil-water separator and the low Wen Penlin tower, and is used for obtaining most of the water part from the oil-water separator, carrying out cold-heat exchange on most of the water part and organic working medium of a low-temperature ORC power generation system to form medium-temperature medium-pressure organic working medium gas and low-temperature cooling water, and conveying the low-temperature cooling water to the low Wen Penlin tower; the low-pressure expansion machine is connected with the low-temperature heat exchanger, obtains medium-temperature medium-pressure organic working medium gas from the low-temperature heat exchanger, and applies work to the medium-temperature medium-pressure organic working medium gas to form low-temperature low-pressure organic working medium gas; a low voltage generator connected to the low voltage expander, the low voltage generator obtaining work from the low voltage expander and converting the work into electricity; the low-temperature ORC power generation system cooler is connected with the low-pressure expansion machine, obtains low-temperature low-pressure organic working medium gas from the low-pressure expansion machine, and cools the low-temperature low-pressure organic working medium gas to form low-temperature low-pressure organic working medium liquid; the low-pressure working medium pump is connected with the low-temperature ORC power generation system cooler and the low-temperature heat exchanger, obtains low-temperature low-pressure organic working medium liquid from the low-temperature ORC power generation cooler, and conveys the low-temperature low-pressure organic working medium liquid to the low-temperature heat exchanger.
Further, the high temperature spray tower further comprises: the spraying part is positioned in the middle of the high-temperature spraying tower and is used for spraying the high-temperature oil-containing waste steam; the high-temperature waste gas condensing part is positioned at the lower part of the high-temperature spray tower, condenses the high-temperature oil-containing waste gas to form high-temperature condensate, and separates high-temperature non-condensable gas; and the high-temperature non-condensable gas collecting part is positioned at the upper part of the high-temperature spray tower and is used for collecting the high-temperature non-condensable gas.
Further, the system further comprises: and the safety valve is respectively connected with the high-temperature spray tower and/or the buffer tank and/or the low Wen Penlin tower and/or the oil-water separator to prevent dangerous accidents of the high-temperature spray tower and/or the buffer tank and/or the low Wen Penlin tower and/or the oil-water separator.
Further, the system further comprises: and the exhaust valve is respectively connected with the high-temperature spray tower and/or the buffer tank and/or the low Wen Penlin tower and/or the oil-water separator, and respectively performs exhaust decompression on the high-temperature spray tower and/or the buffer tank and/or the low Wen Penlin tower and/or the oil-water separator.
Further, the low Wen Penlin tower further comprises: the spraying part is positioned in the middle of the low Wen Penlin tower and is used for spraying the low-temperature oil-containing waste steam and the high-temperature non-condensable gas; a low Wen Feiqi condensing portion, the low Wen Feiqi condensing portion being located at a lower portion of the low Wen Penlin column, condensing the low temperature oily waste gas and the high temperature non-condensable gas to form a low temperature condensate, and separating the low temperature non-condensable gas; and the low-temperature non-condensable gas collecting part is positioned at the upper part of the low Wen Penlin tower and is used for collecting the low-temperature non-condensable gas.
Further, the system further comprises: and the air pump is respectively connected with the low Wen Penlin tower and the non-condensable gas treatment device, obtains the low-temperature non-condensable gas from the low Wen Penlin tower, and pumps the low-temperature non-condensable gas to the non-condensable gas treatment device.
Further, the system further comprises: the sensing unit is respectively connected with the high-pressure separator, the high-temperature spray tower, the high-temperature booster pump, the buffer tank, the high-temperature heat exchanger, the high-pressure expansion machine, the high-pressure generator, the high-temperature ORC power generation system cooler, the high-pressure working medium pump, the low-pressure separator, the low-pressure Wen Penlin tower, the low-temperature booster pump, the oil-water separator, the low-temperature heat exchanger, the low-pressure expansion machine, the low-pressure generator, the low-temperature circulating water pump, the low-temperature ORC power generation system cooler, the working medium pump, the air pump and the non-condensable gas treatment device, and respectively senses the high-pressure separator, the high-temperature spray tower, the high-temperature booster pump, the buffer tank, the high-temperature heat exchanger, the high-pressure expansion machine, the high-pressure generator, the high-temperature ORC power generation system cooler, the high-pressure working medium pump, the low-pressure separator, the low-pressure Wen Penlin, the low-pressure tower, the low-pressure generator, the low-pressure condenser, the low-temperature pump, the working medium pump, the low-pressure condenser, the working parameter cooling unit, the low-temperature pump, the low-temperature condenser, the working medium pump, the low-pressure pump, the working parameter cooling unit, the low-temperature pump, the high-pressure generator, the high-pressure condenser, the high-pressure generator, the working parameter, the low-pressure condenser, the low-pressure pump, the working parameter.
Further, the system further comprises: the control unit is respectively in control connection with the high-pressure separator, the high-temperature spray tower, the high-temperature booster pump, the buffer tank, the high-temperature heat exchanger, the high-pressure expander, the high-pressure generator, the high-temperature ORC power generation system cooler, the high-pressure working medium pump, the low-pressure separator, the low-pressure Wen Penlin tower, the low-temperature booster pump, the oil-water separator, the low-temperature heat exchanger, the low-pressure expander, the low-pressure generator, the low-temperature circulating water pump, the low-temperature ORC power generation system cooler, the working medium pump, the air pump and the noncondensable gas treatment device, the high-pressure separator, the high-temperature spray tower, the high-temperature booster pump, the buffer tank, the high-temperature heat exchanger, the high-pressure expansion machine, the high-pressure generator, the high-temperature ORC power generation system cooler, the high-pressure working medium pump, the low-pressure separator, the low-temperature Wen Penlin tower, the low-temperature booster pump, the oil-water separator, the low-temperature heat exchanger, the low-pressure expansion machine, the low-pressure generator, the low-temperature circulating water pump, the low-temperature ORC power generation system cooler, the low-pressure working medium pump, the air pump and the non-condensable gas treatment device are controlled to start, stop and work respectively.
The above technical solutions in the embodiments of the present application at least have the following technical effects:
1. the embodiment of the application provides an oil field high Wen Cai liquid outlet waste heat recovery and power generation system, which is used for carrying out high-pressure and normal-pressure two-stage separation on an oil field high Wen Cai liquid outlet, respectively recovering oil field oily waste gas with different pressures and temperatures separated by the two-stage separation, and respectively coupling condensate with different temperatures formed by different temperatures and energy levels of the recovered oil field oily waste gas with a high-temperature ORC power generation system and a low-temperature ORC power generation system to carry out two-stage power generation. Through the technical scheme, the technical problems of pollution and heat waste caused by directly discharging generated oily waste steam into an atmosphere in the cooling and depressurization treatment process of the high Wen Cai liquid of the oil field in the prior art are solved, the technical effects of airtight gathering and transportation of the oil field, oil and gas resource recovery, heat energy utilization efficiency of the oily waste steam of the oil field improvement, environmental pollution caused by the waste steam reduction and cascade utilization of waste heat of waste steam discharged outside the oil field are achieved.
2. According to the embodiment of the application, a part of cooled condensate from the high-temperature heat exchanger is conveyed to the high-temperature spray tower for cyclic utilization, and the other part of cooled condensate is conveyed to the oil-water separator for separating oil and water, so that the technical effects of reducing oil-gas resource waste and pollution are achieved.
3. According to the embodiment of the application, the low-temperature spray tower is used for carrying out cold and heat exchange on the oil-containing waste gas and the cooled high-temperature non-condensable gas to form low-temperature condensate, the low-temperature non-condensable gas is separated, and the low-temperature non-condensable gas is collected, so that the technical effects of recycling oil and gas resources and reducing pollution are achieved.
4. According to the embodiment of the application, the low-temperature non-condensable gas from the low Wen Penlin tower is pumped to the non-condensable gas treatment device by using the air pump, and is subjected to harmless treatment, so that the technical effect of reducing pollution is achieved.
5. According to the embodiment of the application, the low-temperature cooling water is conveyed to the low Wen Penlin tower through the low-temperature heat exchanger to be used as cooling water, and the high-temperature non-condensable gas from the high-temperature spray tower is conveyed to the low Wen Penlin tower to be reused, so that the technical effects of reducing waste and pollution are achieved.
Drawings
Fig. 1 is a schematic diagram of an oilfield high Wen Cai effluent waste heat recovery and power generation system provided by an embodiment of the application.
In the figure: 1-high pressure separator, 2-high temperature spray tower, 3-high temperature booster pump, 4-buffer tank, 5-high temperature circulating water pump, 6-high temperature heat exchanger, 7-high pressure expander, 8-high pressure generator, 10-high temperature ORC power generation system cooler, 11-high pressure working medium pump, 14-low pressure separator, 15-low Wen Penlin tower, 16-low temperature booster pump, 17-oil water separator, 18-low temperature circulating water pump, 19-low temperature heat exchanger, 20-low pressure expander, 21-low pressure generator, 23-low temperature ORC power generation system cooler, 24-low pressure working medium pump, 25-noncondensable gas processing device, 28-oil field gathering and transportation system and 29-air pump.
Detailed Description
The embodiment of the application provides an oil field high Wen Cai liquid waste heat recovery and power generation system, which is characterized in that a high Wen Cai liquid from an oil well is separated into a medium-temperature produced liquid and a high-temperature oil-containing waste gas through a high-pressure separator; cold and heat exchange is carried out on the high-temperature oil-containing waste gas from the high-pressure separator through a high Wen Penlin tower, high-temperature condensate is generated, high-temperature non-condensable gas is separated, and the high-temperature non-condensable gas is conveyed to a low-temperature spray tower; separating the medium temperature produced liquid from the high pressure separator into a low temperature produced liquid and a low temperature oil-containing waste gas by the low pressure separator; the high-temperature non-condensable gas from the high Wen Penlin tower and the low-temperature oily waste gas from the low-pressure separator are subjected to cold-heat exchange through the low-temperature spray tower, low-temperature condensate is generated, the low-temperature non-condensable gas is separated, and further the low-temperature non-condensable gas is subjected to harmless treatment through the non-condensable gas treatment device, so that the technical effect of purifying the waste gas is achieved; meanwhile, the heat energy of high-temperature condensate in the high Wen Penlin tower is used for heating the organic working medium of the high-temperature ORC power generation system through a high-temperature heat exchanger to obtain overheated high-temperature high-pressure organic working medium gas, so that the high-pressure expander is pushed to do work, and further the high-pressure generator is driven to generate power, and the technical effect of power generation is achieved; mixing low-temperature condensate from a low-temperature spray tower and cooled condensate from a buffer tank in an oil-water separator, separating oil in the low-temperature condensate from the buffer tank, and heating organic working medium of a low-temperature ORC power generation system by using heat energy of most of separated water through a low-temperature heat exchanger to obtain overheated medium-temperature medium-pressure organic working medium gas, pushing a low-pressure expansion machine to work, and further driving a low-pressure generator to generate power, thereby realizing the technical effect of power generation; the high-temperature condensate cooled by the high-temperature heat exchanger is returned to the high Wen Penlin tower to be used as cooling liquid of high-temperature oil-containing waste steam; the water part cooled by the low-temperature heat exchanger is returned to the low-temperature spray tower to be used as low-temperature oil-containing waste steam and high-temperature non-condensable gas cooling water, so that the airtight collection and transportation and heat recovery of the high Wen Cai liquid outlet of the oil field are realized, the waste heat of the high Wen Cai liquid outlet is recovered, the gradient utilization of the waste heat is realized, the utilization rate of the heat energy is improved, and the environmental pollution of the high Wen Cai liquid outlet of the oil field in the cooling and depressurization treatment process is reduced.
The present application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can more detailed understanding of the present application.
Fig. 1 is a schematic diagram of an oil field high Wen Cai effluent waste heat recovery and power generation system according to an embodiment of the present application, where the system includes: a high-pressure separator 1, a high-Wen Penlin tower 2, a high-temperature booster pump 3, a buffer tank 4, a high-temperature circulating water pump 5, a high-temperature heat exchanger 6, a high-pressure expander 7, a high-pressure generator 8, a high-temperature ORC power generation system cooler 10, a high-pressure working medium pump 11, a low-pressure separator 14, a low-Wen Penlin tower 15, a low-temperature booster pump 16, an oil-water separator 17, a low-temperature circulating water pump 18, a low-temperature heat exchanger 19, a low-pressure expander 20, a low-pressure generator 21, a low-temperature ORC power generation system cooler 23 and a low-pressure working medium pump 24.
The elements of the system are described one by one:
a high pressure separator 1, said high pressure separator 1 being connected to an oil well, said high pressure separator 1 obtaining a high Wen Cai effluent from said oil well (produced at a temperature above 150 ℃ as a high Wen Cai effluent), separating said Gao Wencai effluent into a medium temperature produced effluent (produced at a temperature above 120 ℃ and below 150 ℃ as a medium produced effluent) and a high temperature oily waste gas (oily waste gas at a high temperature above 120 ℃);
Specifically, the inlet of the high-pressure separator 1 is connected with the outlet of the oil well, the high Wen Cai liquid from the oil well is output to the high-pressure separator 1, and after the temperature and pressure reduction separation by the high-pressure separator 1, the Gao Wencai liquid is separated into medium-temperature produced liquid and high-temperature oily waste gas.
A high Wen Penlin tower 2, the high-temperature spray tower 2 is connected with the high-pressure separator 1, the high-temperature spray tower 2 obtains high-temperature oil-containing waste gas from the high-pressure separator 1, carries out cold-heat exchange on the high-temperature oil-containing waste gas to form high-temperature condensate, and separates high-temperature non-condensable gas;
specifically, the inlet of the high-temperature spray tower 2 is connected with the outlet of the high-pressure separator 1, and the high-temperature spray tower 2 obtains high-temperature oil-containing waste gas from the high-pressure separator 1.
Further, the high temperature spray tower 2 further includes:
a spraying portion (not shown) located at the middle of the high-temperature spray tower, for spraying the high-temperature oil-containing waste gas from the high-pressure separator 1;
a high-temperature waste gas condensing part (not shown in the figure) which is positioned at the lower part of the high-temperature spray tower, condenses the high-temperature oil-containing waste gas to form high-temperature condensate and separates high-temperature non-condensable gas;
And a high-temperature non-condensable gas collecting part (not shown in the figure) which is positioned at the upper part of the high-temperature spray tower and is used for collecting the high-temperature non-condensable gas.
The high-temperature oil-containing waste gas inlet of the high-temperature spray tower 2 is positioned between the high-temperature waste gas condensation part and the high-temperature spray part, and after entering the high-temperature spray part for spraying after entering the high-temperature Wen Penlin tower 2, one part of the high-temperature oil-containing waste gas enters the high-temperature waste gas condensation part, and the other part is converted into the high-temperature noncondensable gas to enter the high-temperature noncondensable gas collection part.
The high-temperature booster water pump 3 is respectively connected with the high-temperature spray tower and the high-temperature heat exchanger, and the high-temperature booster water pump 3 obtains high-temperature condensate from the high-temperature spray tower 2 and conveys the high-temperature condensate to the high-temperature heat exchanger 6;
specifically, the inlet of the high-temperature booster water pump 3 is respectively connected with the outlet of the high Wen Feiqi condensation part of the high-temperature spray tower 2, and the outlet of the high-temperature booster water pump 3 is connected with the inlet of the high-temperature heat exchanger 6, so that the high-temperature condensate from the high-temperature spray tower 2 is conveyed to the super-heat exchanger 6.
The high-temperature heat exchanger 6 is respectively connected with the high-temperature booster water pump 3 and the buffer tank 4, the high-temperature heat exchanger 6 obtains high-temperature condensate from the high-temperature booster water pump 3, and the high-temperature condensate is subjected to cold-heat exchange with the organic working medium of the high-temperature ORC power generation system to form high-temperature high-pressure organic working medium gas and cooled condensate;
specifically, the high-temperature condensate side inlet of the high-temperature heat exchanger 6 is connected with the outlet of the high-temperature booster water pump 3 to obtain the high-temperature condensate from the high-temperature booster water pump 3, and the high-temperature condensate side outlet of the high-temperature heat exchanger 6 is connected with the inlet of the buffer tank 4 to enable the buffer tank 4 to store the cooled condensate.
The buffer tank 4 is respectively connected with the high-temperature heat exchanger 6, the oil-water separator 17 and the high-temperature circulating water pump 5, and the buffer tank 4 stores the cooled condensate;
in particular, the inlet of the buffer tank 4 is connected to the high temperature condensate side outlet of the high temperature heat exchanger 6 to obtain the cooled condensate from the high temperature heat exchanger 6; the lower outlet of the buffer tank 4 is connected with the inlet of the high-temperature circulating water pump 5; conveying most of the cooled condensate to the high-temperature spray tower 2 through the high-temperature circulating water pump 5 to be used as cooling liquid for recycling; the upper outlet of the buffer tank 4 is connected with the inlet of the oil-water separator 17, and a small part of the cooled condensate is conveyed to the oil-water separator 17 so as to separate and recycle a small part of oil.
The high-temperature circulating water pump 5 is respectively connected with the high-temperature spray tower 2 and the buffer tank 4, and the high-temperature circulating water pump 5 obtains the cooled condensate from the buffer tank 4 and conveys the cooled condensate to the high-temperature spray tower 2;
in particular, the inlet of the high temperature circulating water pump 5 is connected to the lower outlet of the buffer tank 4 to obtain a major part of the cooled condensate from the buffer tank 4; the outlet of the high-temperature circulating water pump 5 is connected with the high-temperature spray tower 2, and most of the cooled condensate is conveyed to the high-temperature spray tower 2 to be used as cooling liquid for recycling.
The high-pressure expander 7 is connected with the high-temperature heat exchanger 6, and the high-pressure expander 7 obtains high-temperature high-pressure organic working medium gas from the high-temperature heat exchanger 6 and applies work to the high-temperature high-pressure organic working medium gas to form low-temperature low-pressure organic working medium gas;
specifically, the inlet of the high-pressure expander 7 is connected to the outlet of the high-temperature heat exchanger 6 on the organic working medium side to obtain the high-temperature high-pressure organic working medium gas from the high-temperature heat exchanger 6, and apply work to the high-temperature high-pressure organic working medium gas to form a low-temperature low-pressure organic working medium gas.
A high voltage generator 8, said high voltage generator 8 being connected to said high voltage expander 7, said high voltage generator 8 obtaining work from said high voltage expander 7 and converting said work into electricity;
specifically, the high-voltage generator 9 converts work from the high-voltage expander 7 into electric energy.
A high temperature ORC power generation system cooler 10, wherein the high temperature ORC power generation system cooler 10 is connected with the high pressure expander 7, and the high temperature ORC power generation system cooler obtains low temperature low pressure organic working medium gas from the high pressure expander 7 and cools the low temperature low pressure organic working medium gas to form low temperature low pressure organic working medium liquid;
specifically, the inlet of the high-temperature ORC power generation system cooler 10 is connected to the outlet of the high-pressure expander 7, so as to obtain a low-temperature low-pressure organic working medium gas from the high-pressure expander 7, and cool the low-temperature low-pressure organic working medium gas to form a low-temperature low-pressure organic working medium liquid.
A high-pressure working medium pump 11, wherein the high-pressure working medium pump 11 is connected with the high-temperature ORC power generation system cooler 10 and the high-temperature heat exchanger 6, and the high-pressure working medium pump 11 obtains low-temperature low-pressure organic working medium liquid from the high-pressure ORC power generation system cooler and conveys the low-temperature low-pressure organic working medium liquid to the high-temperature heat exchanger 6;
Specifically, the inlet of the high-pressure working fluid pump 11 is connected to the outlet of the high-temperature ORC power generation system cooler 10 to obtain the low-temperature low-pressure organic working fluid from the high-temperature ORC power generation system cooler 10; the outlet of the high-pressure working medium pump 11 is connected with the inlet of the high-temperature heat exchanger 6, and the low-temperature low-pressure organic working medium liquid is conveyed to the high-temperature heat exchanger 6 for recycling.
A low pressure separator 14, said low pressure separator 14 being connected to said high pressure separator 1, said low pressure separator 14 obtaining a medium temperature produced fluid from said high pressure separator 1 and separating said medium temperature produced fluid into a low temperature produced fluid (temperature about 100 ℃) and a low temperature oily waste gas (temperature about 100 ℃);
specifically, the inlet of the low pressure separator 14 is connected to the middle temperature produced liquid outlet of the high pressure separator 1 to obtain the middle temperature produced liquid from the high pressure separator 1, and the middle temperature produced liquid is separated into a low temperature produced liquid and a low temperature oil-containing waste gas.
A low temperature spray tower 15, wherein the low Wen Penlin tower 15 is respectively connected with the low pressure separator 14 and the high temperature spray tower 2, the low Wen Penlin tower 15 obtains low temperature oil-containing waste gas from the low pressure separator and high temperature non-condensable gas from the high temperature spray tower 2, and performs cold and heat exchange on the low temperature oil-containing waste gas and the high temperature non-condensable gas to form low temperature condensate (the temperature is about 95 ℃), and the low temperature non-condensable gas is separated;
Specifically, the low temperature oil-containing waste gas inlet of the low Wen Penlin column 15 is connected to the low temperature oil-containing waste gas outlet of the low pressure separator 14 to obtain the low temperature oil-containing waste gas from the low pressure separator 14, and the high temperature non-condensable gas inlet of the low Wen Penlin column 15 is connected to the high temperature non-condensable gas side outlet of the high temperature spray column 2 to obtain the high temperature non-condensable gas from the high temperature spray column 2; the low Wen Penlin tower 15 performs cold and heat exchange on the low-temperature oil-containing waste gas and the high-temperature non-condensable gas to form low-temperature condensate and separate the low-temperature non-condensable gas.
Further, the low Wen Penlin tower 15 further comprises:
a spraying portion (not shown) located at the middle of the low Wen Penlin column 15 for spraying the low-temperature oily waste gas from the low-pressure separator 14 and the high-temperature non-condensable gas from the high-temperature spray column 2;
a low Wen Feiqi condensing portion (not shown) located in a lower portion of the low Wen Penlin column 15 for condensing the low temperature oily waste gas and the high temperature non-condensable gases to form a low temperature condensate and separating the low temperature non-condensable gases;
A low-temperature non-condensable gas collecting portion (not shown) located at an upper portion of the low Wen Penlin column 15, and collecting the low-temperature non-condensable gas.
The low-temperature oil-containing waste gas and the high-temperature non-condensable gas inlet of the low Wen Penlin tower 15 are positioned between the low Wen Feiqi condensation part and the low-temperature spraying part, and after entering the low-temperature spraying tower 15 and being sprayed by the low-temperature spraying part, one part of the low-temperature oil-containing waste gas and the high-temperature non-condensable gas enter the low Wen Feiqi condensation part, the other part of the low-temperature oil-containing waste gas and the high-temperature non-condensable gas are converted into the low-temperature non-condensable gas to enter the low-temperature non-condensable gas collecting part, and further, the low-temperature non-condensable gas is pumped to the non-condensable gas treatment device 25 through the air pump 29 for harmless treatment.
A low temperature booster pump 16, wherein the low temperature booster pump 16 is respectively connected with the low Wen Penlin tower 15 and the oil-water separator 17, the low temperature booster pump 16 obtains low temperature condensate from the low Wen Penlin tower 15, and conveys the low temperature condensate to the oil-water separator 17;
specifically, the inlet of the low temperature booster water pump 16 is connected to the outlet of the low temperature oil-containing waste vapor condensing portion of the low Wen Penlin column 15 to obtain low temperature condensate from the low Wen Penlin column 15; the outlet of the booster water pump 16 is connected with the inlet of the oil-water separator 17, and the low-temperature condensate is conveyed to the oil-water separator 17.
An oil-water separator 17, wherein the oil-water separator 17 is connected with the low-temperature booster pump 16 and the buffer tank 4, the oil-water separator 17 obtains low-temperature condensate from the low-temperature booster pump 16 and the cooled condensate from the buffer tank 4, mixes the low-temperature condensate and the cooled condensate into mixed condensate, and separates the mixed condensate into an oil part and a water part;
specifically, the inlet of the oil-water separator 17 is connected to the low-temperature booster water pump 16, and the low-temperature condensate from the low Wen Penlin tower 15 is sent to the oil-water separator 17 by the low-temperature booster water pump 16; the inlet of the oil-water separator 17 is connected to the upper outlet of the buffer tank 4 to obtain the cooled condensate from the buffer tank 4, and the cooled condensate are mixed to a mixed condensate, which is separated into an oil portion and a water portion. Wherein the oil fraction is recovered by an oilfield gathering system 28 and the water fraction is sent to a cryogenic heat exchanger 19 for heat exchange.
A low-temperature circulating water pump 18, wherein the low-temperature circulating water pump 18 is respectively connected with the oil-water separator 17 and the low-temperature heat exchanger 19, and the low-temperature circulating water pump 18 obtains a majority of the water part from the oil-water separator 17 and conveys the majority of the water part to the low-temperature heat exchanger 19;
Specifically, the low-temperature circulating water pump 18 is connected to the oil-water separator 17 and the low-temperature heat exchanger 19, respectively, and the low-temperature circulating water pump 18 obtains a large part of the water portion from the oil-water separator 17 and sends the large part of the water portion to the low-temperature heat exchanger 19 for reuse.
A cryogenic heat exchanger 19, said cryogenic heat exchanger 19 being connected to said oil-water separator 17 and said low Wen Penlin column 15, said cryogenic heat exchanger 19 obtaining a substantial portion of said water portion from said oil-water separator 17 and exchanging heat and cold of a substantial portion of said water portion with low temperature ORC power generation system organic working fluid to form medium temperature medium pressure organic working fluid and low temperature cooling water, and delivering said low temperature cooling water to said low Wen Penlin column 15;
specifically, the inlet of the high Wen Shuice of the low-temperature heat exchanger 19 is connected with the outlet of the low-temperature circulating water pump 18, the water part from the oil-water separator 17 is conveyed to the low-temperature heat exchanger 19 by the low-temperature circulating water pump 18, the low-temperature heat exchanger 19 performs cold-heat exchange between the water part and organic working fluid of the ORC power generation system to form medium-temperature medium-pressure organic working fluid gas and low-temperature cooling water, and most of the low-temperature cooling water is conveyed to the low Wen Penlin tower 15 as cooling water for spraying, and a small part of the low-temperature cooling water is used for external heat transfer and heating.
A low-pressure expander 20, wherein the low-pressure expander 20 is connected with the low-temperature heat exchanger 19, and the low-pressure expander 20 obtains the medium-temperature medium-pressure organic working medium gas from the low-temperature heat exchanger 19 and applies work to the medium-temperature medium-pressure organic working medium gas to form a low-temperature low-pressure organic working medium gas;
specifically, the inlet of the low-pressure expander 20 is connected to the outlet of the low-temperature heat exchanger 19 on the organic working medium side, so as to obtain the medium-temperature medium-pressure organic working medium gas of the low-temperature heat exchanger 19, and apply work to the medium-temperature medium-pressure organic working medium gas, and form the low-temperature low-pressure organic working medium gas.
A low-voltage generator 21, said low-voltage generator 21 being connected to said low-voltage expander 20, said low-voltage generator 21 obtaining work from said low-voltage expander 20 and converting said work into electricity;
specifically, the low-pressure generator 21 converts work from the low-pressure expander 20 into electric energy.
A low temperature ORC power generation system cooler 23, the low temperature ORC power generation system cooler 23 being connected to the low pressure expander 20, the low temperature ORC power generation system cooler 23 obtaining low temperature low pressure organic working fluid from the low pressure expander 20 and cooling the low temperature low pressure organic working fluid to form a low temperature low pressure organic working fluid;
Specifically, the inlet of the low-temperature ORC power generation system cooler 23 is connected to the outlet of the low-pressure expander 20 to obtain a low-temperature low-pressure organic working gas from the low-pressure expander 20, and cool the low-temperature low-pressure organic working gas to form a low-temperature low-pressure organic working liquid.
And a low-pressure working medium pump 24, wherein the low-pressure working medium pump 24 is connected with the low-temperature ORC power generation system cooler 23 and the low-temperature heat exchanger 19, and the low-pressure working medium pump 24 obtains low-temperature low-pressure organic working medium liquid from the low-temperature ORC power generation cooler 23 and conveys the low-temperature low-pressure organic working medium liquid to the low-temperature heat exchanger 19.
Specifically, the inlet of the low pressure working fluid pump 24 is connected to the outlet of the low temperature ORC power generation system cooler 23 to obtain the low temperature low pressure organic working fluid from the low temperature ORC power generation system cooler 23; the outlet of the low-pressure working medium pump 24 is connected with the inlet of the low-temperature heat exchanger 19, and the low-temperature low-pressure organic working medium liquid is conveyed to the low-temperature heat exchanger 19 for recycling.
Further, the system further comprises: and the safety valve is respectively connected with the high-temperature spray tower 2 and/or the buffer tank 4 and/or the low Wen Penlin tower 15 and/or the oil-water separator 17, so that dangerous accidents of the high-temperature spray tower 2 and/or the buffer tank 4 and/or the low Wen Penlin tower 15 and/or the oil-water separator 17 are prevented.
Further, the system further comprises: and the exhaust valve is respectively connected with the high-temperature spray tower 2 and/or the buffer tank 4 and/or the low Wen Penlin tower 15 and/or the oil-water separator 17, and is used for respectively carrying out exhaust decompression on the high-temperature spray tower 2 and/or the buffer tank 4 and/or the low Wen Penlin tower 15 and/or the oil-water separator 17.
Further, the system further comprises: the sensing units are respectively connected with the high-pressure separator 1, the high-temperature spray tower 2, the high-temperature booster pump 3, the buffer tank 4, the high-temperature heat exchanger 6, the high-pressure expansion machine 7, the high-pressure generator 8, the high-temperature ORC power generation system cooler 10, the high-pressure working medium pump 11, the low-pressure separator 14, the low-pressure Wen Penlin tower 15, the low-temperature booster pump 16, the oil-water separator 17, the low-temperature heat exchanger 19, the low-pressure expansion machine 20, the low-pressure generator 21, the low-temperature circulating water pump 18, the low-temperature ORC power generation system cooler 23, the low-pressure working medium pump 24, the air pump 29 and the non-condensable gas treatment device 25, and respectively sense parameters of the high-pressure separator 1, the high-temperature working medium spray tower 2, the high-temperature booster pump 3, the buffer tank 4, the high-temperature heat exchanger 6, the high-pressure expansion machine 7, the high-pressure generator 8, the high-temperature booster pump 10, the low-temperature ORC power generation system 11, the low-temperature heat exchanger 19, the low-pressure expansion machine 20, the low-pressure pump 21, the low-pressure pump 23, the low-pressure pump 37, the low-pressure pump 25, the working medium pump 37, the high-pressure generator 11, the high-pressure generator 8, the high-pressure generator 11, the high-pressure booster pump 11, the low-pressure pump 37, the high-pressure working medium pump 25, the high-pressure working parameters, the high-pressure pump 2, the high-pressure working medium pump 2, and the high-pressure pump 2.
Further, the system further comprises: a control unit which is respectively in control connection with the high-pressure separator 1, the high-temperature spray tower 2, the high-temperature booster pump 3, the buffer tank 4, the high-temperature heat exchanger 6, the high-pressure expander 7, the high-pressure generator 8, the high-temperature ORC power generation system cooler 10, the high-pressure working medium pump 11, the low-pressure separator 14, the low-temperature Wen Penlin tower 15, the low-temperature booster pump 16, the oil-water separator 17, the low-temperature heat exchanger 19, the low-pressure expander 20, the low-pressure generator 21, the low-temperature circulating water pump 18, the low-temperature ORC power generation system cooler 23, the low-pressure working medium pump 24, the air extracting pump 29 and the noncondensable gas processing device 25, the high-pressure separator 1, the high-temperature spray tower 2, the high-temperature booster water pump 3, the buffer tank 4, the high-temperature heat exchanger 6, the high-pressure expander 7, the high-pressure generator 8, the high-temperature ORC power generation system cooler 10, the high-pressure working medium pump 11, the low-pressure separator 14, the low-Wen Penlin tower 15, the low-temperature booster pump 16, the oil-water separator 17, the low-temperature heat exchanger 19, the low-pressure expander 20, the low-pressure generator 21, the low-temperature circulating water pump 18, the low-temperature ORC power generation system cooler 23, the low-pressure working medium pump 24, the air pump 29 and the noncondensable gas processing device 25 are controlled to start, stop and operate respectively.
Further, the control unit further includes:
the oil-water separator liquid level control system (not shown in the figure) is used for controlling the liquid level of the oil-water separator 17 to keep the liquid level of the oil-water separator 17 within a reasonable range. The oil-water separator liquid level control system controls the frequency of an external transmission pump and the opening angle of an electric valve on a pipeline which is transmitted to the oil field gathering and transmission system 28 through a liquid level meter, and transmits water to the oil field gathering and transmission system 28; when the liquid level of the liquid level meter reaches the lower limit, the electric valve is closed, so that the liquid level of the oil-water separator 17 is controlled.
A non-condensable gas discharge control system (not shown) for controlling the discharge of non-condensable gas to the non-condensable gas treatment unit 25. The noncondensable gas discharge system controls the opening and closing of the electric valve and the starting and stopping of the air pump 29 through the pressure of the noncondensable gas collecting part of the spray tower, thereby realizing the control of noncondensable gas discharge.
A non-condensable gas treatment control system (not shown) for controlling the start and stop of the non-condensable gas treatment device 25. When the non-condensable gas is fed into the non-condensable gas treatment device 25, the non-condensable gas treatment control system starts the non-condensable gas treatment device 25 to perform harmless treatment on the non-condensable gas.
And the ORC power generation control system (not shown in the figure) is used for controlling the pressure of the organic working medium output by the working medium pump, further controlling the vaporization temperature and the superheat degree of the organic working medium and finally controlling the power generation capacity of the ORC power generation system.
And the cooler control system (not shown in the figure) is used for controlling the frequency and start-stop of a water pump or a fan of the cooler so as to keep the temperature of the organic working fluid at the outlet of the cooler within a reasonable range.
The waste heat recovery and power generation system for the high Wen Cai liquid outlet of the oil field has at least the following technical effects:
1. the embodiment of the application provides an oil field high Wen Cai liquid outlet waste heat recovery and power generation system, which is used for carrying out high-pressure and normal-pressure two-stage separation on an oil field high Wen Cai liquid outlet, respectively recovering oil field oily waste gas with different pressures and temperatures separated by the two-stage separation, and respectively coupling condensate with different temperatures formed by different temperatures and energy levels of the recovered oil field oily waste gas with a high-temperature ORC power generation system and a low-temperature ORC power generation system to carry out two-stage power generation. Through the technical scheme, the technical problems of pollution and heat waste caused by directly discharging generated oily waste steam into an atmosphere in the cooling and depressurization treatment process of the high Wen Cai liquid of the oil field in the prior art are solved, the technical effects of airtight gathering and transportation of the oil field, oil and gas resource recovery, heat energy utilization efficiency of the oily waste steam of the oil field improvement, environmental pollution caused by the waste steam reduction and cascade utilization of waste heat of waste steam discharged outside the oil field are achieved.
2. According to the embodiment of the application, a part of cooled condensate from the high-temperature heat exchanger is conveyed to the high-temperature spray tower for cyclic utilization, and the other part of cooled condensate is conveyed to the oil-water separator for separating oil and water, so that the technical effects of reducing oil-gas resource waste and pollution are achieved.
3. According to the embodiment of the application, the low-temperature spray tower is used for carrying out cold and heat exchange on the oil-containing waste gas and the cooled high-temperature non-condensable gas to form low-temperature condensate, the low-temperature non-condensable gas is separated, and the low-temperature non-condensable gas is collected, so that the technical effects of recycling oil and gas resources and reducing pollution are achieved.
4. According to the embodiment of the application, the low-temperature non-condensable gas from the low Wen Penlin tower is pumped to the non-condensable gas treatment device by using the air pump, and is subjected to harmless treatment, so that the technical effect of reducing pollution is achieved.
5. According to the embodiment of the application, the low-temperature cooling water is conveyed to the low Wen Penlin tower through the low-temperature heat exchanger to be used as cooling water, and the high-temperature non-condensable gas from the high-temperature spray tower is conveyed to the low Wen Penlin tower to be reused, so that the technical effects of reducing waste and pollution are achieved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. An oilfield high Wen Cai effluent waste heat recovery and power generation system, comprising:
a high pressure separator connected to the well, said high pressure separator obtaining a high Wen Cai effluent from said well, separating said Gao Wencai effluent into a medium temperature produced liquid and a high temperature oily waste gas;
a high Wen Penlin tower, the high temperature spray tower is connected with the high pressure separator, the high temperature spray tower obtains high temperature oil-containing waste gas from the high pressure separator, carries out cold and heat exchange on the high temperature oil-containing waste gas to form high temperature condensate and separates high temperature non-condensable gas;
The high-temperature booster water pump is respectively connected with the high-temperature spray tower and the high-temperature heat exchanger, obtains high-temperature condensate from the high-temperature spray tower and conveys the high-temperature condensate to the high-temperature heat exchanger;
the high-temperature heat exchanger is respectively connected with the high-temperature booster water pump and the buffer tank, obtains high-temperature condensate from the high-temperature booster water pump, and performs cold-heat exchange on the high-temperature condensate and the high-temperature ORC power generation system organic working medium to form high-temperature high-pressure organic working medium gas and cooled condensate;
the buffer tank is respectively connected with the high-temperature heat exchanger, the oil-water separator and the high-temperature circulating water pump, and the buffer tank stores the cooled condensate;
the high-temperature circulating water pump is respectively connected with the high-temperature spray tower and the buffer tank, and is used for obtaining the cooled condensate from the buffer tank and conveying the cooled condensate to the high-temperature spray tower;
the high-pressure expansion machine is connected with the high-temperature heat exchanger, obtains high-temperature high-pressure organic working medium gas from the high-temperature heat exchanger, and applies work to the high-temperature high-pressure organic working medium gas to form low-temperature low-pressure organic working medium gas;
A high voltage generator connected to the high voltage expander, the high voltage generator obtaining work from the high voltage expander and converting the work into electricity;
the high-temperature ORC power generation system cooler is connected with the high-pressure expander, obtains low-temperature low-pressure organic working medium gas from the high-pressure expander, and cools the low-temperature low-pressure organic working medium gas to form low-temperature low-pressure organic working medium liquid;
the high-pressure working medium pump is connected with the high-temperature ORC power generation system cooler and the high-temperature heat exchanger, obtains low-temperature low-pressure organic working medium liquid from the high-temperature ORC power generation system cooler, and conveys the low-temperature low-pressure organic working medium liquid to the high-temperature heat exchanger;
the low-pressure separator is connected with the high-pressure separator, and the low-pressure separator obtains medium-temperature produced liquid from the high-pressure separator and separates the medium-temperature produced liquid into low-temperature produced liquid and low-temperature oil-containing waste gas;
the low Wen Penlin tower is respectively connected with the low-pressure separator and the high-temperature spray tower, the low Wen Penlin tower obtains low-temperature oil-containing waste gas from the low-pressure separator and high-temperature non-condensable gas from the high-temperature spray tower, and performs cold and heat exchange on the low-temperature oil-containing waste gas and the high-temperature non-condensable gas to form low-temperature condensate and separate the low-temperature non-condensable gas;
The low-temperature booster pump is respectively connected with the low Wen Penlin tower and the oil-water separator, obtains low-temperature condensate from the low Wen Penlin tower and conveys the low-temperature condensate to the oil-water separator;
the oil-water separator is connected with the low-temperature booster pump and the buffer tank, and is used for obtaining low-temperature condensate from the low-temperature booster pump and the cooled condensate from the buffer tank, mixing the low-temperature condensate and the cooled condensate into mixed condensate, and separating the mixed condensate into an oil part and a water part;
the low-temperature circulating water pump is respectively connected with the oil-water separator and the low-temperature heat exchanger, obtains most of the water part from the oil-water separator and conveys most of the water part to the low-temperature heat exchanger;
the low-temperature heat exchanger is connected with the oil-water separator and the low Wen Penlin tower, and is used for obtaining most of the water part from the oil-water separator, carrying out cold-heat exchange on most of the water part and organic working medium of a low-temperature ORC power generation system to form medium-temperature medium-pressure organic working medium gas and low-temperature cooling water, and conveying the low-temperature cooling water to the low Wen Penlin tower;
The low-pressure expansion machine is connected with the low-temperature heat exchanger, obtains medium-temperature medium-pressure organic working medium gas from the low-temperature heat exchanger, and applies work to the medium-temperature medium-pressure organic working medium gas to form low-temperature low-pressure organic working medium gas;
a low voltage generator connected to the low voltage expander, the low voltage generator obtaining work from the low voltage expander and converting the work into electricity;
the low-temperature ORC power generation system cooler is connected with the low-pressure expansion machine, obtains low-temperature low-pressure organic working medium gas from the low-pressure expansion machine, and cools the low-temperature low-pressure organic working medium gas to form low-temperature low-pressure organic working medium liquid;
the low-pressure working medium pump is connected with the low-temperature ORC power generation system cooler and the low-temperature heat exchanger, obtains low-temperature low-pressure organic working medium liquid from the low-temperature ORC power generation cooler, and conveys the low-temperature low-pressure organic working medium liquid to the low-temperature heat exchanger.
2. The system of claim 1, wherein the high temperature spray tower further comprises:
The spraying part is positioned in the middle of the high-temperature spraying tower and is used for spraying the high-temperature oil-containing waste steam;
the high-temperature waste gas condensing part is positioned at the lower part of the high-temperature spray tower, condenses the high-temperature oil-containing waste gas to form high-temperature condensate, and separates high-temperature non-condensable gas;
and the high-temperature non-condensable gas collecting part is positioned at the upper part of the high-temperature spray tower and is used for collecting the high-temperature non-condensable gas.
3. The system of claim 1, wherein the system further comprises:
and the safety valve is respectively connected with the high-temperature spray tower and/or the buffer tank and/or the low Wen Penlin tower and/or the oil-water separator to prevent dangerous accidents of the high-temperature spray tower and/or the buffer tank and/or the low Wen Penlin tower and/or the oil-water separator.
4. The system of claim 1, wherein the system further comprises:
and the exhaust valve is respectively connected with the high-temperature spray tower and/or the buffer tank and/or the low Wen Penlin tower and/or the oil-water separator, and respectively performs exhaust decompression on the high-temperature spray tower and/or the buffer tank and/or the low Wen Penlin tower and/or the oil-water separator.
5. The system of claim 1, wherein the low Wen Penlin column further comprises:
the spraying part is positioned in the middle of the low Wen Penlin tower and is used for spraying the low-temperature oil-containing waste steam and the high-temperature non-condensable gas;
a low Wen Feiqi condensing portion, the low Wen Feiqi condensing portion being located at a lower portion of the low Wen Penlin column, condensing the low temperature oily waste gas and the high temperature non-condensable gas to form a low temperature condensate, and separating the low temperature non-condensable gas;
and the low-temperature non-condensable gas collecting part is positioned at the upper part of the low Wen Penlin tower and is used for collecting the low-temperature non-condensable gas.
6. The system of claim 1, wherein the system further comprises:
and the air pump is respectively connected with the low Wen Penlin tower and the non-condensable gas treatment device, obtains the low-temperature non-condensable gas from the low Wen Penlin tower, and pumps the low-temperature non-condensable gas to the non-condensable gas treatment device.
7. The system of claim 1, wherein the system further comprises:
the sensing unit is respectively connected with the high-pressure separator, the high-temperature spray tower, the high-temperature booster pump, the buffer tank, the high-temperature heat exchanger, the high-pressure expansion machine, the high-pressure generator, the high-temperature ORC power generation system cooler, the high-pressure working medium pump, the low-pressure separator, the low Wen Penlin tower, the low-temperature booster pump, the oil-water separator, the low-temperature heat exchanger, the low-pressure expansion machine, the low-pressure generator, the low-temperature circulating water pump, the low-temperature ORC power generation system cooler, the working medium pump, the air pump and the noncondensable gas treatment device, and respectively senses the high-pressure separator, the high-temperature spray tower, the high-temperature booster pump, the buffer tank, the high-temperature heat exchanger, the high-pressure expansion machine, the high-pressure generator, the high-temperature ORC power generation system cooler, the high-pressure working medium pump, the low-pressure separator, the low-pressure oil-water Wen Penlin tower, the low-temperature separator, the low-temperature ORC power generation system cooler, the low-pressure booster pump, the low-pressure separator, the low-pressure working medium pump, the low-pressure Wen Penlin tower, the low-temperature generator, the low-temperature booster pump, the working medium pump, the working parameter cooling unit, the low-temperature pump, the low-temperature condenser, the working medium pump, the high-pressure pump, the high temperature and the working parameter control device.
8. The system of claim 1, wherein the system further comprises:
the control unit is respectively in control connection with the high-pressure separator, the high-temperature spray tower, the high-temperature booster pump, the buffer tank, the high-temperature heat exchanger, the high-pressure expansion machine, the high-pressure generator, the high-temperature ORC power generation system cooler, the high-pressure working medium pump, the low-pressure separator, the low-pressure Wen Penlin tower, the low-temperature booster pump, the oil-water separator, the low-temperature heat exchanger, the low-pressure expansion machine, the low-pressure generator, the low-temperature circulating water pump, the low-temperature ORC power generation system cooler, the working medium pump, the air pump and the non-condensable gas treatment device, and respectively controls the high-pressure separator, the high-temperature spray tower, the high-temperature booster pump, the buffer tank, the high-temperature heat exchanger, the high-pressure expansion machine, the high-pressure generator, the high-temperature ORC power generation system cooler, the high-pressure working medium pump, the low-pressure separator, the low-pressure Wen Penlin, the low-temperature separator, the low-pressure oil-water pump, the low-pressure Wen Penlin, the low-pressure generator, the low-pressure booster pump, the low-pressure condenser, the low-pressure air pump, the low-pressure condenser, the working medium cooling device and the non-condensable gas treatment device.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202250275U (en) * | 2011-08-19 | 2012-05-30 | 中国石油天然气股份有限公司 | Power generation device using low-temperature produced liquid in oil fields |
| EP2514931A1 (en) * | 2011-04-20 | 2012-10-24 | General Electric Company | Integration of waste heat from charge air cooling into a cascaded organic rankine cycle system |
| 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 |
| CN104295901A (en) * | 2014-09-29 | 2015-01-21 | 新疆敦华石油技术有限公司 | Environmentally-friendly recycling device for exhaust steam of gathering tank |
| CN208564663U (en) * | 2018-03-16 | 2019-03-01 | 新疆敦华石油技术股份有限公司 | A kind of recycling of oil field high-temperature produced fluid residual heat and electricity generation system |
-
2018
- 2018-03-16 CN CN201810220406.9A patent/CN108412567B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2514931A1 (en) * | 2011-04-20 | 2012-10-24 | General Electric Company | Integration of waste heat from charge air cooling into a cascaded organic rankine cycle system |
| CN202250275U (en) * | 2011-08-19 | 2012-05-30 | 中国石油天然气股份有限公司 | Power generation device using low-temperature produced liquid in oil fields |
| 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 |
| CN104295901A (en) * | 2014-09-29 | 2015-01-21 | 新疆敦华石油技术有限公司 | Environmentally-friendly recycling device for exhaust steam of gathering tank |
| CN208564663U (en) * | 2018-03-16 | 2019-03-01 | 新疆敦华石油技术股份有限公司 | A kind of recycling of oil field high-temperature produced fluid residual heat and electricity generation system |
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