Tandem type coupling oil field steam huff and puff and solid waste treatment device utilizing green electricity energy storage

Abstract

The utility model discloses a green electricity energy storage tandem type coupling oil field steam huff and puff and solid waste treatment device, and relates to the technical field of energy conservation and environmental protection. According to the utility model, the fluctuating green electricity is used as an energy source, the conduction oil and the fused salt are respectively used as two-stage heat exchange media, energy is provided for common steam huff and puff and oil sludge pyrolysis processes of an oil field, and fossil energy consumption and greenhouse gas emission are reduced; according to the utility model, steam huff and puff and oil sludge treatment are coupled in series, and expensive and high-value fossil resources are replaced by utilizing the characteristic of low cost of green electricity, so that higher economic benefits can be obtained. The green electricity energy storage tandem type coupling oil field steam huff and puff and solid waste treatment device can be obtained.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of energy -conserving and environment -protecting technology, concretely relates to a device of utilizing green electricity energy storage series connection type coupling oil field steam huff and puff and solid waste disposal. BACKGROUND

[0002] Petroleum industry is an energy-intensive industry, and oil fields have low-cost oil and natural gas resources, so oil or natural gas is often used as an energy source for oil exploitation and refining, resulting in serious high energy consumption and fossil energy dependence problems.

[0003] Steam huff and puff process is a thermal recovery technology used in oil exploitation to improve oil recovery efficiency. By injecting high-temperature and high-pressure steam into the oil layer, the flowability of crude oil is improved, and the viscosity and surface tension are reduced, resulting in higher oil recovery. Currently, high-temperature and high-pressure steam is generated by burning natural gas in a steam injection furnace to heat the feed water. This process consumes a large amount of natural gas, which is an important chemical raw material in the chemical industry, and the economic value generated by incineration is significantly lower, so there is a large room for improvement in the economic efficiency of the current steam huff and puff process.

[0004] In addition, a large amount of oil sludge (referred to as sludge) is generated during the process of oil exploitation, storage, transportation and refining, and this material must be treated before it can be discharged. Currently, pyrolysis is widely used for sludge disposal, and the heat source is usually natural gas combustion. Sludge pyrolysis also consumes a large amount of natural gas, resulting in serious energy waste and high carbon emissions.

[0005] Because oil fields often have a wide site, oil fields usually have some renewable energy power generation facilities such as wind power, photovoltaic or photo-thermal. Green electricity generated by renewable energy sources has strong volatility, and connecting to the power grid can easily disrupt the stability of the power grid, causing impact on the capacity and carrying capacity of the power grid, so energy storage technology needs to be introduced to store green electricity. However, the existing industrial system of oil fields is relatively mature, and the green electricity consumption capacity is bottlenecked. SUMMARY

[0006] The utility model aims at solving the problems of low efficiency of renewable energy green electricity consumption and oil sludge disposal of traditional devices, and provides a device of utilizing green electricity energy storage series connection type coupling oil field steam huff and puff and solid waste disposal.

[0007] A device of utilizing green electricity energy storage series connection type coupling oil field steam huff and puff and solid waste disposal, comprising a primary steam system, a secondary steam system, a molten salt system, an oil sludge treatment primary system and an oil sludge treatment secondary system.

[0008] The primary steam system comprises a heat conducting oil heat exchanger 1, a heat conducting oil electric heater 2 and a heat conducting device, the secondary steam system comprises a molten salt heat exchanger 4, the molten salt system comprises a low temperature salt container, a molten salt electric heater 7 and a high temperature salt container, the oil sludge treatment primary system comprises an oil sludge drying device 5, and the oil sludge treatment secondary system comprises a steam heating oil sludge pyrolyzer 9, a condensing device and a coke incineration device.

[0009] The heat conducting oil outlet of the heat conducting oil heat exchanger 1 is communicated with the heat conducting oil inlet of the heat conducting device through a pipeline, the heat conducting oil outlet of the heat conducting device is communicated with the heat conducting oil inlet of the heat conducting oil electric heater 2 through a pipeline, and the heat conducting oil outlet of the heat conducting oil electric heater 2 is communicated with the heat conducting oil inlet of the heat conducting oil heat exchanger 1 through a pipeline.

[0010] The molten salt outlet of the molten salt heat exchanger 4 is communicated with the molten salt inlet of the oil sludge drying device 5 through a pipeline, the molten salt outlet of the oil sludge drying device 5 is communicated with the molten salt inlet of the low temperature salt container through a pipeline, the molten salt outlet of the low temperature salt container is communicated with the molten salt inlet of the molten salt electric heater 7 through a pipeline, the molten salt outlet of the molten salt electric heater 7 is communicated with the molten salt inlet of the high temperature salt container through a pipeline, and the molten salt outlet of the high temperature salt container is communicated with the molten salt inlet of the molten salt heat exchanger 4 through a pipeline.

[0011] The steam outlet of the heat conducting oil heat exchanger 1 is communicated with the steam inlet of the molten salt heat exchanger 4 through a pipeline, the steam outlet of the molten salt heat exchanger 4 is communicated with the steam inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline, and the steam outlet of the coke incineration device is communicated with the steam inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline.

[0012] The dry oil sludge outlet of the oil sludge drying device 5 is communicated with the dry oil sludge inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline, and the evaporation gas outlet of the oil sludge drying device 5 is communicated with the evaporation gas inlet of the coke incineration device through a pipeline.

[0013] The coke outlet of the steam heating oil sludge pyrolyzer 9 is communicated with the coke inlet of the coke incineration device through a pipeline, the synthesis gas outlet of the steam heating oil sludge pyrolyzer 9 is communicated with the synthesis gas inlet of the condensing device through a pipeline, and the incondensable gas outlet of the condensing device is communicated with the incondensable gas inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline.

[0014] The utility model discloses the beneficial effect has:

[0015] 1. The utility model makes full use of green electricity resources, guarantees the balance and stability of power grid;

[0016] 2. The utility model reduces the massive fossil energy consumption caused by traditional steam swallowing and oil sludge disposal device;

[0017] 3. The utility model discloses a coupling process of steam stimulation and oil sludge disposal, which can realize the effect that oil sludge is generated and treated at the same time, and reduces the storage and transportation cost of oil sludge solid waste.

[0018] 4. The utility model discloses that heat conducting oil and fused salt are selected as energy storage medium respectively, which overcomes the technical problems of high-temperature decomposition of heat conducting oil and low-temperature solidification of fused salt, and ensures the stable operation of the coupling process.

[0019] 5. The utility model discloses the characteristics of fully absorbing green electricity resources, and is applied to oil field steam stimulation and oil sludge disposal. The coupling process of steam stimulation and oil sludge disposal can realize the effect that oil sludge is generated and treated at the same time, and reduces the storage and transportation cost of oil sludge solid waste. The two-stage heat transfer medium can overcome the heat transfer deterioration phenomenon of the working medium.

[0020] 6. The utility model discloses the purpose of oil field having relatively rich green electricity resources. The traditional steam stimulation and oil sludge disposal process consumes a large amount of fossil energy and produces a large amount of carbon emissions. Therefore, the utility model is designed in a targeted manner, and a device for coupling oil field steam stimulation and solid waste disposal by using green electricity energy storage is used.

[0021] 7. The process route of the utility model is to convert the electric energy of green electricity into heat energy, and heat conducting oil and fused salt are used as heat transfer medium, which are used for 1 heating water to generate high-parameter steam for steam stimulation, and 2 heating oil sludge to complete the resourceful disposal of oil sludge solid waste.

[0022] 8. The utility model uses green electricity as the energy source for steam stimulation and oil sludge pyrolysis, which avoids consuming valuable fossil energy, effectively absorbs green electricity, saves energy, and reduces the impact of green electricity on the power grid. The utility model uses fluctuating green electricity as the energy source, and heat conducting oil and fused salt are used as two-stage heat transfer medium respectively, which provides energy for the common steam stimulation and oil sludge pyrolysis process in oil field, reduces the consumption of fossil energy and greenhouse gas emissions, and obtains higher economic benefits by using the low-cost characteristics of green electricity to replace expensive and high-value fossil resources.

[0023] The utility model can obtain a device for coupling oil field steam stimulation and solid waste disposal by using green electricity energy storage in series. DRAWINGS

[0024] Figure 1The utility model discloses a kind of operation process diagram of device for coupling oilfield steam huff and puff and solid waste disposal using green electricity energy storage series connection, 1 indicates heat transfer oil heat exchanger, 2 indicates heat transfer oil electric heater, 3 indicates heat transfer oil tank, 4 indicates molten salt heat exchanger, 5 indicates oil sludge drying device, 6 indicates low temperature salt tank, 7 indicates molten salt electric heater, 8 indicates high temperature salt tank, 9 indicates steam heat oil sludge pyrolyzer, 10 indicates condenser, 11 indicates coke incinerator; DETAILED DESCRIPTION

[0025] Specific embodiment one: the device for coupling oilfield steam huff and puff and solid waste disposal using green electricity energy storage series connection of the embodiment, including primary steam system, secondary steam system, molten salt system, oil sludge processing primary system and oil sludge processing secondary system;

[0026] The primary steam system includes heat transfer oil heat exchanger 1, heat transfer oil electric heater 2 and heat transfer device, using heat transfer oil as heat exchange medium, low temperature high pressure feed water is heated into medium temperature high pressure superheated steam;

[0027] The secondary steam system includes molten salt heat exchanger 4, the molten salt system includes low temperature salt container, molten salt electric heater 7 and high temperature salt container, the oil sludge processing primary system includes oil sludge drying device 5, and the oil sludge processing secondary system includes steam heat oil sludge pyrolyzer 9, condensing device and coke incineration device;

[0028] The heat transfer oil outlet of heat transfer oil heat exchanger 1 is communicated with the heat transfer oil inlet of heat transfer device through pipeline, the heat transfer oil outlet of heat transfer device is communicated with the heat transfer oil inlet of heat transfer oil electric heater 2 through pipeline, and the heat transfer oil outlet of heat transfer oil electric heater 2 is communicated with the heat transfer oil inlet of heat transfer oil heat exchanger 1 through pipeline;

[0029] The molten salt outlet of molten salt heat exchanger 4 is communicated with the molten salt inlet of oil sludge drying device 5 through pipeline, the molten salt outlet of oil sludge drying device 5 is communicated with the molten salt inlet of low temperature salt container through pipeline, the molten salt outlet of low temperature salt container is communicated with the molten salt inlet of molten salt electric heater 7 through pipeline, the molten salt outlet of molten salt electric heater 7 is communicated with the molten salt inlet of high temperature salt container through pipeline, and the molten salt outlet of high temperature salt container is communicated with the molten salt inlet of molten salt heat exchanger 4 through pipeline;

[0030] The steam outlet of heat transfer oil heat exchanger 1 is communicated with the steam inlet of molten salt heat exchanger 4 through pipeline, the steam outlet of molten salt heat exchanger 4 is communicated with the steam inlet of steam heat oil sludge pyrolyzer 9 through pipeline, and the steam outlet of coke incineration device is communicated with the steam inlet of steam heat oil sludge pyrolyzer 9 through pipeline;

[0031] The dry oil sludge outlet of the oil sludge drying device 5 is communicated with the dry oil sludge inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline, and the evaporated gas outlet of the oil sludge drying device 5 is communicated with the evaporated gas inlet of the coke incineration device through a pipeline;

[0032] The coke outlet of the steam heating oil sludge pyrolyzer 9 is communicated with the coke inlet of the coke incineration device through a pipeline, the synthesis gas outlet of the steam heating oil sludge pyrolyzer 9 is communicated with the synthesis gas inlet of the condensing device through a pipeline, and the non-condensed gas outlet of the condensing device is communicated with the non-condensed gas inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline.

[0033] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the heat conduction device is a heat conduction oil tank 3.

[0034] The other steps are the same as those in specific embodiment one.

[0035] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the low-temperature salt container is a low-temperature salt tank 6.

[0036] The other steps are the same as those in specific embodiment one or two.

[0037] Specific embodiment four: the difference between this embodiment and one of specific embodiments one to three is that the high-temperature salt container is a high-temperature salt tank 8.

[0038] The other steps are the same as those in specific embodiments one to three.

[0039] Specific embodiment five: the difference between this embodiment and one of specific embodiments one to four is that the condensing device is a condenser 10.

[0040] The other steps are the same as those in specific embodiments one to four.

[0041] Specific embodiment six: the difference between this embodiment and one of specific embodiments one to five is that the coke incineration device is a coke incineration furnace 11.

[0042] The other steps are the same as those in specific embodiments one to five.

[0043] The beneficial effects of the present application are verified by the following examples:

[0044] Example 1: a device for coupling oil field steam huff and puff and solid waste disposal in series by using green electricity energy storage, comprising a primary steam system, a secondary steam system, a molten salt system, an oil sludge treatment primary system and an oil sludge treatment secondary system;

[0045] The primary steam system comprises a heat conducting oil heat exchanger 1, a heat conducting oil electric heater 2 and a heat conducting oil tank 3, and uses heat conducting oil as heat exchange medium to heat low-temperature high-pressure feed water into medium-temperature high-pressure superheated steam;

[0046] The secondary steam system comprises a molten salt heat exchanger 4, and uses high-temperature molten salt as heat exchange medium to heat medium-temperature high-pressure steam into high-temperature high-pressure superheated steam, which is used as process steam for steam stimulation and heat source and protective carrier gas for dry oil sludge pyrolysis;

[0047] The molten salt system comprises a low-temperature salt tank 6, a molten salt electric heater 7 and a high-temperature salt tank 8, and uses green electricity as energy source to heat low-temperature molten salt into high-temperature molten salt;

[0048] The primary oil sludge treatment system comprises an oil sludge drying device 5, and uses medium-temperature molten salt as heat exchange medium to dry wet oil sludge into dry oil sludge, and meanwhile generates evaporated gas;

[0049] The secondary oil sludge treatment system comprises a steam heating oil sludge pyrolyzer 9, a condenser 10 and a coke incinerator 11, and uses high-temperature high-pressure superheated steam generated by the molten salt heat exchanger 4 as pyrolysis heat source and protective gas to pyrolyze dry oil sludge into synthetic gas and coke in the steam heating oil sludge pyrolyzer;

[0050] The heat conducting oil outlet of the heat conducting oil heat exchanger 1 is connected to the heat conducting oil inlet of the heat conducting oil tank 3 through a pipeline, the heat conducting oil outlet of the heat conducting oil tank 3 is connected to the heat conducting oil inlet of the heat conducting oil electric heater 2 through a pipeline, and the heat conducting oil outlet of the heat conducting oil electric heater 2 is connected to the heat conducting oil inlet of the heat conducting oil heat exchanger 1 through a pipeline;

[0051] The molten salt outlet of the molten salt heat exchanger 4 is connected to the molten salt inlet of the oil sludge drying device 5 through a pipeline, the molten salt outlet of the oil sludge drying device 5 is connected to the molten salt inlet of the low-temperature salt tank 6 through a pipeline, the molten salt outlet of the low-temperature salt tank 6 is connected to the molten salt inlet of the molten salt electric heater 7 through a pipeline, the molten salt outlet of the molten salt electric heater 7 is connected to the molten salt inlet of the high-temperature salt tank 8 through a pipeline, and the molten salt outlet of the high-temperature salt tank 8 is connected to the molten salt inlet of the molten salt heat exchanger 4 through a pipeline;

[0052] The steam outlet of the heat conducting oil heat exchanger 1 is connected to the steam inlet of the molten salt heat exchanger 4 through a pipeline, the steam outlet of the molten salt heat exchanger 4 is connected to the steam inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline, and the steam outlet of the coke incinerator 11 is connected to the steam inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline;

[0053] The dry oil sludge outlet of the oil sludge drying device 5 is communicated with the dry oil sludge inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline, and the evaporated gas outlet of the oil sludge drying device 5 is communicated with the evaporated gas inlet of the coke incinerator 11 through a pipeline;

[0054] The coke outlet of the steam heating oil sludge pyrolyzer 9 is communicated with the coke inlet of the coke incinerator 11 through a pipeline, the synthesis gas outlet of the steam heating oil sludge pyrolyzer 9 is communicated with the synthesis gas inlet of the condenser 10 through a pipeline, and the non-condensed gas outlet of the condenser 10 is communicated with the non-condensed gas inlet of the steam heating oil sludge pyrolyzer 9 through a pipeline.

[0055] Embodiment 2: A method for operating a device for coupling oil field steam stimulation and solid waste disposal in series by using green electricity energy storage, which is performed according to the following steps:

[0056] Step S1: Start the heat conducting oil electric heater 2 and the molten salt electric heater 7 to heat the heat conducting oil and the molten salt, respectively;

[0057] In step S1, the heat conducting oil is heated to 200-280℃, and the molten salt is heated to 540-580℃;

[0058] Step S2: Pump the high-temperature heat conducting oil generated in the heat conducting oil electric heater 2 to the heat conducting oil heat exchanger 1 under the action of the high-pressure oil pump, heat the high-temperature heat conducting oil in the heat conducting oil heat exchanger 1 with the preheated high-pressure feed water, generate medium-temperature high-pressure steam, and at the same time, the high-temperature heat conducting oil is cooled into low-temperature heat conducting oil, which is returned to the heat conducting oil tank 3 and then to the heat conducting oil electric heater 2 for re-heating, completing the heat conducting oil circulation;

[0059] The temperature of the low-temperature heat conducting oil in step S2 is 100℃;

[0060] Step S3: Generate medium-temperature high-pressure steam by heat exchanging the preheated high-pressure feed water with the high-temperature heat conducting oil, and then heat exchange the medium-temperature high-pressure steam with the high-temperature molten salt in the molten salt heat exchanger 4 to generate high-temperature high-pressure superheated steam;

[0061] The temperature of the medium-temperature high-pressure steam in step S3 is 280℃, and the temperature of the superheated steam is 540℃;

[0062] The superheated steam in step S3 is used as process steam for steam stimulation;

[0063] Step S4: Pump the low-temperature molten salt stored in the low-temperature salt tank to the molten salt electric heater 7 under the action of the molten salt pump, heat the low-temperature molten salt in the molten salt electric heater 7 by using green electricity to generate high-temperature molten salt, and then send the high-temperature molten salt to the molten salt heat exchanger 4 after flowing through the high-temperature salt tank 8, heat exchange the high-temperature molten salt with the medium-temperature high-pressure steam to be cooled into medium-temperature molten salt, and then send the medium-temperature molten salt to the oil sludge drying device 5;

[0064] The temperature of the low-temperature molten salt in step S4 is 200℃, the temperature of the high-temperature molten salt is ≤540℃, and the temperature of the medium-temperature molten salt is 280℃;

[0065] Step S5: The wet oil sludge is sent into the oil sludge drying device 5 through the feeding device, and is heated and dried by the medium-temperature molten salt to become dry oil sludge, while emitting evaporated gas composed of water vapor and gaseous hydrocarbons; the dry oil sludge is sent into the steam-heated oil sludge pyrolyzer 9, the evaporated gas is introduced into the coke incinerator 11, and the medium-temperature molten salt is cooled by the wet oil sludge to generate low-temperature molten salt, which is sent back to the low-temperature salt tank 6 to complete the molten salt circulation;

[0066] The water content of the wet oil sludge in step S5 is ≤40%, the water content of the dry oil sludge is ≤10%, and the temperature of the low-temperature molten salt is 200℃;

[0067] Step S6: Dry oil sludge is introduced into the steam-heated oil sludge pyrolyzer 9, and high-temperature and high-pressure superheated steam generated by the molten salt electric heater 7 is introduced at the same time; the dry oil sludge undergoes pyrolysis reaction in the steam-heated oil sludge pyrolyzer 9 to produce synthesis gas, while coke is also produced;

[0068] The synthesis gas in step S6 contains non-condensable gas, water vapor and oil gas;

[0069] Step S7: The synthesis gas enters the condenser 10 through the heat preservation pipeline, and the water vapor and oil gas are liquefied into condensed water and pyrolysis oil, which are separated in the oil-water separator in the condenser 10, and the synthesis gas is cooled to produce non-condensable gas;

[0070] The pyrolysis oil in step S7 is recycled as a petroleum resource;

[0071] Step S8: The evaporated gas produced in the oil sludge drying device 5, the coke produced in the steam-heated oil sludge pyrolyzer 9, and the non-condensable gas produced in the condenser 10 are sent into the coke incinerator 11 for incineration; the coke incinerator 11 is internally provided with a water-cooled heating surface, and preheated high-pressure feed water is introduced into the water-cooled heating surface to generate high-temperature and high-pressure steam, which is sent into the steam-heated oil sludge pyrolyzer 9; the slag and flue gas produced in the combustion process are safely discharged.

[0072] In the primary steam system, green electricity is used as a heating heat source, and heat-conducting oil is used as a heat transfer medium to generate medium-temperature and high-pressure primary steam. The primary steam is in a saturated state or a superheated state, and the temperature of the primary steam is not greater than the maximum value of the conventional use temperature range of the heat-conducting oil. Further, the heat-conducting oil heat exchanger 1 uses green electricity to heat the heat-conducting oil. Furthermore, the heat-conducting oil tank 3 is used to store high-temperature heat-conducting oil, and an electric heating belt and insulation materials are externally configured to prevent the heat-conducting oil from cooling down.

[0073] In the secondary steam system, the molten salt is used as the heat transfer medium to generate the secondary steam which meets the parameters required by the steam huff and puff process. The secondary steam is the superheated steam with high temperature and high pressure, and the temperature of the secondary steam is not greater than the maximum value of the conventional temperature range of the molten salt.

[0074] In the molten salt system, the low-temperature salt tank 6 sends the low-temperature molten salt cooled in the oil sludge primary treatment system into the molten salt electric heater 7 through the molten salt pump. Further, the electric energy of green electricity is converted into the heat energy of the molten salt itself by the molten salt electric heater 7, and the low-temperature molten salt is heated to high-temperature molten salt. Still further, the high-temperature salt tank 8 sends the high-temperature molten salt heated in the molten salt electric heater 7 into the molten salt heat exchanger 4 through the molten salt pump, and the high-temperature molten salt is cooled to medium-temperature molten salt in the molten salt heat exchanger 4.

[0075] In the oil sludge primary treatment system, the oil sludge drying device 5 uses the heat of the medium-temperature molten salt to dry the wet oil sludge into dry oil sludge. Further, the medium-temperature molten salt is cooled to low-temperature molten salt and sent back to the low-temperature salt tank 6. Still further, after the wet oil sludge is dried, the evaporation gas composed of water vapor and short-chain petroleum hydrocarbon is emitted.

[0076] In the oil sludge secondary treatment system, the steam heat supply oil sludge pyrolyzer 9 has a heat exchange process, and the dry oil sludge absorbs the heat energy of the steam to generate thermal decomposition to produce synthesis gas and coke. Further, the synthesis gas is introduced into the condenser 10 to be separated into condensed water, pyrolysis oil and non-condensable gas. Still further, the coke, non-condensable gas and evaporation gas are sent into the coke incinerator 11 as fuel for combustion to produce harmless flue gas and slag.

[0077] Further, the low-temperature and high-pressure water can be preheated by the heat of the flue gas discharged from the coke incinerator 11 before being sent into the heat transfer oil heat exchanger 1 and the coke incinerator 11, that is, the economizer is arranged in the flue gas discharge duct of the coke incinerator 11 to improve the energy utilization rate.

[0078] Further, all the above-mentioned devices are provided with insulation layers to avoid energy loss.

[0079] Further, the heat tracing layer is arranged between the tank body and the insulation layer of the heat transfer oil tank 3, the low-temperature salt tank 6 and the high-temperature salt tank 8, and the heat tracing layer uses the stable power supply connected to the power grid to appropriately heat when the green electricity is not supplied or the power is low, so as to ensure that the heat transfer oil and the molten salt are at a reasonable operating temperature.

[0080] Further, if the high-temperature and high-pressure steam generated by the coke incinerator 11 can provide more heat than the heat required by the dry oil sludge pyrolysis, the part of the high-temperature and high-pressure steam exceeding the required heat can be introduced as the steam required by the oil field steam huff and puff process and injected into the oil well.

[0081] Further, the coke incinerator 11 is configured with a conventional fuel burner, which can be fed with pyrolysis oil or self-provided diesel oil as fuel to be combusted when the coke incinerator is started or when the heat generated by combustion of coke, non-condensable gas and vaporized gas is insufficient.

[0082] The series coupling mode in the embodiment is that: first, the feed water is passed through the steam generation step to generate high-temperature and high-pressure steam required for steam stimulation; then, the generated high-temperature and high-pressure steam is used as a heat source to perform the oil sludge solid waste disposal step. The two steps have a sequential relationship, thus forming the series coupling.

[0083] The circulation or flow process of various media in the embodiment is as follows:

[0084] Steam process (main): preheated water→heat transfer oil heat exchanger 1→molten salt heat exchanger 4→oil well & steam heat oil sludge pyrolyzer 9;

[0085] Steam process (auxiliary): preheated water→coke incinerator 11→steam heat oil sludge pyrolyzer 9 & oil well;

[0086] Heat transfer oil circulation: heat transfer oil tank 3→heat transfer oil electric heater 2→heat transfer oil heat exchanger 1→heat transfer oil tank 3;

[0087] Molten salt circulation (steam): low-temperature salt tank 6→molten salt electric heater 7→high-temperature salt tank 8→molten salt heat exchanger 4→low-temperature salt tank 6;

[0088] Oil sludge process: wet oil sludge→oil sludge drying device 5→steam heat oil sludge pyrolyzer 9→condenser 10 & coke incinerator 11.

Claims

1. A device for coupling oilfield steam stimulation and solid waste disposal in series using green electricity energy storage, characterized in that The device for coupling oil field steam huff and puff and solid waste disposal by using green electricity energy storage series connection comprises a first steam system, a second steam system, a molten salt system, an oil sludge treatment first system and an oil sludge treatment second system. The first steam system comprises a heat conducting oil heat exchanger (1), a heat conducting oil electric heater (2) and a heat conducting device, the second steam system comprises a molten salt heat exchanger (4), the molten salt system comprises a low temperature salt container, a molten salt electric heater (7) and a high temperature salt container, the oil sludge treatment first system comprises an oil sludge drying device (5), and the oil sludge treatment second system comprises a steam heat supply oil sludge pyrolyzer (9), a condensing device and a coke incineration device. The heat conducting oil outlet of the heat conducting oil heat exchanger (1) is communicated with the heat conducting oil inlet of the heat conducting device through a pipeline, the heat conducting oil outlet of the heat conducting device is communicated with the heat conducting oil inlet of the heat conducting oil electric heater (2) through a pipeline, and the heat conducting oil outlet of the heat conducting oil electric heater (2) is communicated with the heat conducting oil inlet of the heat conducting oil heat exchanger (1) through a pipeline. The molten salt outlet of the molten salt heat exchanger (4) is communicated with the molten salt inlet of the oil sludge drying device (5) through a pipeline, the molten salt outlet of the oil sludge drying device (5) is communicated with the molten salt inlet of the low temperature salt container through a pipeline, the molten salt outlet of the low temperature salt container is communicated with the molten salt inlet of the molten salt electric heater (7) through a pipeline, the molten salt outlet of the molten salt electric heater (7) is communicated with the molten salt inlet of the high temperature salt container through a pipeline, and the molten salt outlet of the high temperature salt container is communicated with the molten salt inlet of the molten salt heat exchanger (4) through a pipeline. The steam outlet of the heat conducting oil heat exchanger (1) is communicated with the steam inlet of the molten salt heat exchanger (4) through a pipeline, the steam outlet of the molten salt heat exchanger (4) is communicated with the steam inlet of the steam heat supply oil sludge pyrolyzer (9) through a pipeline, and the steam outlet of the coke incineration device is communicated with the steam inlet of the steam heat supply oil sludge pyrolyzer (9) through a pipeline. The dry oil sludge outlet of the oil sludge drying device (5) is communicated with the dry oil sludge inlet of the steam heat supply oil sludge pyrolyzer (9) through a pipeline, and the evaporation gas outlet of the oil sludge drying device (5) is communicated with the evaporation gas inlet of the coke incineration device through a pipeline. The coke outlet of the steam heat supply oil sludge pyrolyzer (9) is communicated with the coke inlet of the coke incineration device through a pipeline, the synthesis gas outlet of the steam heat supply oil sludge pyrolyzer (9) is communicated with the synthesis gas inlet of the condensing device through a pipeline, and the incondensable gas outlet of the condensing device is communicated with the incondensable gas inlet of the steam heat supply oil sludge pyrolyzer (9) through a pipeline.

2. The device for coupling oilfield steam stimulation and solid waste disposal in series by using green electricity energy storage according to claim 1, characterized in that The heat conducting device is a heat conducting oil tank (3).

3. The device for coupling oilfield steam stimulation and solid waste disposal in series by using green electricity energy storage according to claim 1, characterized in that The low temperature salt container is a low temperature salt tank (6).

4. The device for coupling oilfield steam stimulation and solid waste disposal in series by using green electricity energy storage according to claim 1, characterized in that The high temperature salt container is a high temperature salt tank (8).

5. The device for coupling oilfield steam stimulation and solid waste disposal in series by using green electricity energy storage according to claim 1, characterized in that The condensing device is a condenser (10).

6. The device for coupling oilfield steam stimulation and solid waste disposal in series by using green electricity energy storage according to claim 1, characterized in that The coke incineration device is a coke incineration furnace (11).

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