CN113091035A - Oil field steam injection boiler system for generating steam and hot water by coupling electric boiler - Google Patents
Oil field steam injection boiler system for generating steam and hot water by coupling electric boiler Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 79
- 230000008878 coupling Effects 0.000 title claims abstract description 18
- 238000010168 coupling process Methods 0.000 title claims abstract description 18
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000003129 oil well Substances 0.000 claims abstract description 16
- -1 salt ions Chemical class 0.000 claims description 31
- 238000004090 dissolution Methods 0.000 claims description 26
- 230000005611 electricity Effects 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 46
- 235000019198 oils Nutrition 0.000 description 45
- 238000006243 chemical reaction Methods 0.000 description 18
- 230000008901 benefit Effects 0.000 description 9
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- 238000011084 recovery Methods 0.000 description 7
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- 230000005622 photoelectricity Effects 0.000 description 6
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- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- 238000010795 Steam Flooding Methods 0.000 description 3
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
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- Geochemistry & Mineralogy (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses an oil field steam injection boiler system for generating steam and hot water by coupling an electric boiler. The electric boiler is used for receiving and heating the water output by the first water pump device and outputting hot water and steam; the water output by the second water pump device and the hot water output by the electric boiler both enter a liquid mixer; the steam injection furnace is used for receiving the water output by the liquid mixer, generating and outputting steam; steam output by the electric boiler and steam output by the steam injection furnace both enter a steam mixer and are output by the steam mixer; the superheater is used for receiving the steam output by the steam mixer, heating the steam output by the steam mixer into required high-temperature and high-pressure steam and conveying the steam to the oil well; the first steam pipeline is used for directly conveying steam generated by the electric boiler to the oil well. The invention can save energy, reduce consumption and reduce emission to the utmost extent on meeting the requirement of oil field steam injection.
Description
Technical Field
The invention relates to the technical field of oilfield exploitation ground engineering and comprehensive energy utilization, in particular to an oilfield steam injection boiler system for generating steam and hot water by coupling an electric boiler.
Background
With the increasing concern of global climate change, carbon emission reduction has been proposed on schedule, a 3060 target has been proposed definitely in a central economic working conference, and a new target is also proposed in the heavy oil exploitation industry, namely how to realize further carbon reduction and efficiency improvement on the premise of guaranteeing oil and gas exploitation.
In the mainstream heavy oil thermal recovery process in the world, a large amount of high-temperature high-pressure steam is injected into an oil layer for heating so as to reduce the viscosity of heavy oil, form an oil-water mixture for recovery, and then obtain a final product through oil-water separation. The high temperature and high pressure steam consumed in this process is generated by steam injection furnaces, which consume about 8 tons of steam per ton of thick oil, and oil field steam injection furnaces must generate steam by using conventional fossil fuels, which is an important source of oil field carbon emission. The carbon reduction and efficiency improvement in oil field areas must be started from the optimization of energy allocation of a steam injection boiler system.
Considering the actual conditions that the occupied area of an oil field operation area is wide and wind and light resources are sufficient, how to fully utilize new energy to replace the traditional fossil energy is a very urgent target to develop a novel oil field steam injection system based on the combination of the new energy and the traditional energy, and the method has great significance for sustainable production of the oil field.
According to different oil reservoirs, the heavy oil thermal recovery is mainly characterized in that a working medium is directly heated to generate steam through new energy utilization modes such as solar photo-thermal conversion and the like, and the steam generation comprises modes such as solar photo-thermal conversion steam huff and puff, solar photo-thermal conversion steam flooding and solar photo-thermal conversion hot water flooding.
The solar photo-thermal conversion steam throughput is a yield increasing method for heavy oil exploitation, which comprises the steps of injecting a certain amount of steam into an oil well by a solar photo-thermal conversion method, closing the well for a period of time, and opening the well to produce the heavy oil after the heat energy of the steam is diffused to an oil layer. The main principle of the steam huff and puff mining process is that the temperature of oil products in a field to be mined is improved by using steam to increase the fluidity of an oil reservoir, so that the mining is facilitated, and the whole mining process is crossed and participated in by multiple subjects such as physics, chemistry, thermodynamics and the like.
The solar photo-thermal conversion steam flooding is a method for continuously injecting hot steam into one or more wells, heating underground crude oil and flowing the underground crude oil to a plurality of production wells, and continuously extracting the crude oil from the production wells, wherein the injected steam is obtained through solar photo-thermal conversion.
Solar photo-thermal conversion hot water flooding, namely, a solar heat collection mode is adopted to heat water, and hot water is injected into an oil well to increase the temperature of a stratum and reduce the viscosity of crude oil.
The method for directly heating working medium to generate steam by solar photo-thermal conversion mainly has the following defects:
the solar photo-thermal conversion steam throughput has the defects that thickened oil in a near-wellbore region can only be used and extracted generally, a large number of dead oil regions exist among various well regions, the oil extraction effect and the economic benefit of the technology are gradually reduced along with the reduction of oil storage capacity and formation energy, and therefore other extraction modes are required to be converted to obtain higher economic efficiency when the technology is extracted to a certain extent. In addition, the solar photo-thermal conversion has the natural characteristics of periodicity and large fluctuation, and the solar irradiance is in a discontinuous and extremely unstable state, so that the difficulty is increased for the large-scale application of directly producing steam by solar heat collection in an oil field region.
The solar photo-thermal conversion steam flooding has the defects that the oil displacement effect at the initial stage of exploitation is limited by a stratum and a temperature field, and the oil well can increase the yield after steam is injected for a long time. The investment and maintenance costs are high, a large amount of land is occupied, and complicated pipelines are laid. Meanwhile, the problem of energy storage of solar photo-thermal conversion must be well solved, and after the thick oil thermal recovery steam injection system is added with the energy storage device, the investment and maintenance cost are greatly increased. Meanwhile, the solar heliostat system is expensive in manufacturing cost and occupies a large proportion in one-time investment.
The solar photo-thermal conversion hot water flooding has the defect that the hot water content is low, and the solar photo-thermal conversion hot water flooding cannot be used as an effective heat carrier to bring heat into an oil reservoir. The solar photo-thermal conversion heavy oil thermal recovery project which runs practically is lacked, and the photo-thermal conversion technology is still in the research and design stage.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide an oil field steam injection boiler system for generating steam and hot water by coupling an electric boiler, which can save energy, reduce consumption and reduce emission to the maximum extent on the premise of meeting the oil field steam injection requirement.
The oil field steam injection boiler system for generating steam and hot water by coupling an electric boiler is characterized by comprising the following components:
a first water pump device;
a second water pump device;
the electric boiler is connected with the first water pump device and used for receiving and heating the water output by the first water pump device and outputting hot water and steam;
the liquid mixer is respectively connected with the second water pump device and the electric boiler, and both the water output by the second water pump device and the hot water output by the electric boiler enter the liquid mixer and are output by the liquid mixer;
the steam injection furnace is connected with the liquid mixer and is used for receiving the water output by the liquid mixer, generating and outputting steam;
the steam mixer is respectively connected with the electric boiler and the steam injection furnace, and steam output by the electric boiler and steam output by the steam injection furnace both enter the steam mixer and are output by the steam mixer;
the superheater is connected with the steam mixer and used for receiving the steam output by the steam mixer, heating the steam output by the steam mixer into required high-temperature and high-pressure steam and conveying the steam to an oil well;
a first steam line for delivering steam generated by the electric boiler directly to an oil well.
The oil field steam injection boiler system for generating steam and hot water by coupling the electric boiler has the following advantages: firstly, because the electric boiler adopts electricity to heat the water input by the first water pump device, the electricity used by the electric boiler can be electricity of renewable energy sources such as photoelectric energy and wind power in an oil field area, and the electricity comprises abandoned electricity of photoelectric energy, wind power and the like which cannot be connected to a network. Because photoelectricity and wind electricity mobility are big, when power supply meets the requirement, high-temperature and high-pressure steam produced by an electric boiler enters a steam mixer, when power supply is insufficient, hot water can be produced by the electric boiler, the hot water further enters a steam injection furnace through a liquid mixer to be heated into steam, and therefore low-carbon new energy power which cannot be connected to the network in an oil field area, such as photoelectricity and wind power, can be fully utilized, power waste can be greatly reduced, fossil fuel can be saved to the maximum extent, and emission of carbon dioxide is reduced. Secondly, the advantage of flexible peak regulation of the steam injection furnace is exerted, the steam injection requirement of the oil field can be met, and the use of fossil fuel can be reduced. And thirdly, by arranging a steam mixer and a liquid mixer, unstable steam generated by new energy is converted into a stable steam source in the thermal recovery of the thick oil, so that the production of the thick oil is ensured. Fourthly, through setting up first steam pipeline, when the high temperature high pressure steam that the electric boiler produced is stable vapour source, can directly carry stable vapour source to the oil well. In a word, the oil field steam injection boiler system for generating steam and hot water by the coupling electric boiler can meet the oil field steam injection requirement, save energy, reduce consumption and emission to the maximum extent, and reduce the cost.
According to one embodiment of the invention, the electric boiler and the steam mixer are connected through a second steam pipeline, and one end of the first steam pipeline is communicated with the second steam pipeline.
According to one embodiment of the invention, the electric boiler is further connected to a sewage drain.
According to one embodiment of the invention, the electric boiler is provided in plurality, and a plurality of the electric boilers are arranged in parallel or/and in series.
According to one embodiment of the invention, the electric boiler is a high temperature and high pressure electric heating boiler.
According to one embodiment of the invention, the electric boiler is supplied with electricity from photovoltaic or/and wind power, or from industrial electricity from the power grid.
According to one embodiment of the present invention, the liquid mixer is a thermal device for realizing high-temperature and high-pressure water mixing, and the steam mixer is a thermal device for realizing high-temperature and high-pressure steam mixing.
According to one embodiment of the invention, the water output by the first water pump device is clear water without containing salt ions with positive dissolution characteristics and salt ions with negative dissolution characteristics, or softened saline water without containing salt ions with negative dissolution characteristics but containing salt ions with positive dissolution characteristics; the water output by the second water pump device is clear water which does not contain salt ions with positive dissolution characteristics and salt ions with negative dissolution characteristics, or softened saline water which does not contain salt ions with negative dissolution characteristics but contains salt ions with positive dissolution characteristics.
According to one embodiment of the invention, the steam injection furnace is a once-through steam injection furnace.
According to one embodiment of the invention, the superheater is a platen superheater.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of an oilfield steam injection boiler system coupled with an electric boiler to generate steam and hot water according to an embodiment of the invention.
Reference numerals:
oil field steam injection boiler system 1000 for generating steam and hot water by coupling electric boiler
First water pump device 1, second water pump device 2, electric boiler 3 and liquid mixer 4
Steam injection furnace 5 steam mixer 6 superheater 7 first steam pipeline 8
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An oilfield steam injection boiler system 1000 that is coupled to an electric boiler to generate steam and hot water according to an embodiment of the present invention is described below with reference to fig. 1.
The oilfield steam injection boiler system 1000 for generating steam and hot water by coupling an electric boiler comprises a first water pump device 1, a second water pump device 2, an electric boiler 3, a liquid mixer 4, a steam injection furnace 5, a steam mixer 6, a superheater 7 and a first steam pipeline 8. The electric boiler 3 is connected with the first water pump device 1, and the electric boiler 3 is used for receiving and heating water output by the first water pump device 1 and outputting hot water and steam; the liquid mixer 4 is respectively connected with the second water pump device 2 and the electric boiler 3, and both the water output by the second water pump device 2 and the hot water output by the electric boiler 3 enter the liquid mixer 4 and are output by the liquid mixer 4; the steam injection furnace 5 is connected with the liquid mixer 4, and the steam injection furnace 5 is used for receiving the water output by the liquid mixer 4, generating and outputting steam; the steam mixer 6 is respectively connected with the electric boiler 3 and the steam injection furnace 5, and the steam output by the electric boiler 3 and the steam output by the steam injection furnace 5 both enter the steam mixer 6 and are output by the steam mixer 6; the superheater 7 is connected with the steam mixer 6 and used for receiving the steam output by the steam mixer 6, heating the steam output by the steam mixer 6 into required high-temperature and high-pressure steam and conveying the steam to an oil well; the first steam line 8 is used for conveying the steam generated by the electric boiler 3 directly to the oil well.
It can be understood that the main function of the first water pump device 1 is to supply water as a heating working medium to the electric boiler 3, and the electric boiler 3 heats the input water to raise the temperature of the water to produce hot water and steam. The electric boiler 3 mainly utilizes electric water heating, and the electricity utilization of the electric boiler 3 can be low-carbon new energy electric power which can not be connected to the network, such as the electricity abandonment of photoelectricity, wind power and the like in oil field areas, that is to say, the electricity abandonment in the oil field areas can be fully utilized, and of course, the electric boiler 3 can also adopt other power supplies suitable for the electric boiler 3 such as industrial electricity and the like. Because wind power and photoelectricity in the oil field area are influenced by wind and light, sometimes the electric power is sufficient, sometimes the electric power is insufficient, and the electric power volatility is large. When the power supply meets the requirement, the electric boiler 3 can be adopted to produce high-temperature and high-pressure steam to enter the steam mixer 6 or be directly conveyed to the oil well through the first steam pipeline 8; when the power supply is insufficient, the electric boiler 3 can be used for producing hot water, and the hot water enters the liquid mixer 4 for buffering and then enters the steam injection furnace 5 for heating to form steam. The liquid mixer 4 is mainly used for receiving the hot water output by the electric boiler 3 and the water output by the second water pump device 2, and plays a role in buffering, and the liquid mixer 4 can receive only the hot water output by the electric boiler 3 or only the water output by the second water pump device 2 at the same time, and can also receive the hot water output by the electric boiler 3 and the water output by the second water pump device 2 at the same time. The steam injection furnace 5 heats water using fossil fuel combustion to produce steam. The steam mixer 6 is mainly used for receiving the steam output by the electric boiler 3 and the steam output by the steam injection furnace 5 and has a buffer function, and the steam mixer 6 can only receive the steam output by the electric boiler 3 or the steam output by the steam injection furnace 5 at the same time and can also simultaneously receive the steam output by the electric boiler 3 and the steam output by the steam injection furnace 5. Because the temperature of the steam in the steam mixer 6 does not reach the temperature and pressure of the high-temperature and high-pressure steam required by the oil well in general, the steam in the steam mixer 6 needs to be further heated, heated and pressurized by the superheater 7, so that the high-temperature and high-pressure steam output by the superheater 7 meets the requirements of the oil well.
The oil field steam injection boiler system 1000 for generating steam and hot water by coupling the electric boiler according to the embodiment of the invention has the following advantages: firstly, because the electric boiler 3 adopts electricity to heat the water input by the first water pump device, the electricity used by the electric boiler can be electricity of renewable energy sources such as photoelectric energy and wind power in an oil field area, and the electricity comprises abandoned electricity of photoelectric energy, wind power and the like which cannot be connected to a network. Because photoelectricity and wind electricity mobility are big, when power supply meets the requirement, high-temperature and high-pressure steam produced by the electric boiler 3 can enter the steam mixer 6, when power supply is insufficient, hot water can be produced by the electric boiler 3, the hot water further enters the steam injection furnace 5 through the liquid mixer 4 to be heated into steam, and therefore low-carbon new energy power which cannot be connected to the network in an oil field area, such as photoelectricity and wind power, can be fully utilized, power waste can be greatly reduced, fossil fuel can be saved to the maximum extent, and emission of carbon dioxide is reduced. Secondly, the advantage of flexible peak regulation of the steam injection furnace 5 is exerted, the steam injection requirement of the oil field can be met, and the use of fossil fuel can be reduced. Thirdly, by arranging a steam mixer 6 and a liquid mixer 4, unstable steam generated by new energy is converted into a stable steam source in the thermal recovery of the thick oil, and the production of the thick oil is ensured. Fourthly, by arranging the first steam pipeline 8, when the high-temperature and high-pressure steam generated by the electric boiler 3 is a stable steam source, the stable steam source can be directly conveyed to the oil well. In summary, the oil field steam injection boiler system 1000 for generating steam and hot water by coupling the electric boiler according to the embodiment of the invention can meet the oil field steam injection requirement, save energy, reduce consumption and emission to the maximum extent, and reduce cost.
According to one embodiment of the present invention, the electric boiler 3 is connected to the steam mixer 6 through a second steam line 9, and one end of the first steam line 8 is communicated with the second steam line 9. It can be understood that the second steam pipeline 9 is arranged between the electric boiler 3 and the steam mixer 6, the steam of the electric boiler 3 can be conveyed into the steam mixer 6 through the second steam pipeline 9, and one end of the first steam pipeline 8 is communicated with the second steam pipeline 9, so that a steam interface is prevented from being additionally arranged on the electric boiler 3, and the arrangement of the first steam pipeline 8 is facilitated.
According to an embodiment of the present invention, the electric boiler 3 is further connected to a soil discharge pipe 10 so that the soil in the electric boiler 3 can be periodically discharged.
According to an embodiment of the present invention, there are a plurality of electric boilers 3, and the plurality of electric boilers 3 are arranged in parallel or/and in series, that is, the number and arrangement of the electric boilers 3 can be configured according to actual requirements.
According to one embodiment of the present invention, the electric boiler 3 is a high-temperature and high-pressure electric heating boiler. For example, the electric charging furnace is required to satisfy a high temperature of about 350 ℃ and a high pressure of 13.5 MPa.
According to one embodiment of the invention, the electric boiler 3 is supplied with electricity from photovoltaic or/and wind power, or from industrial electricity from the electric grid. That is, renewable energy electricity such as photovoltaic power, wind power and the like in the oil field area, including photovoltaic power, wind power and the like which cannot be connected to the grid, can be fully utilized, or industrial electricity from the grid or all other electricity suitable for the electric boiler 3 can be adopted according to actual needs.
According to an embodiment of the present invention, the liquid mixer 4 is a thermal device for realizing high-temperature and high-pressure water mixing, and the liquid mixer 4 may be a header, a pressure vessel mixer, etc.; the steam mixer 6 is a thermal device for mixing high-temperature and high-pressure steam, and the steam mixer 6 may be a header, a pressure vessel mixer, or the like.
According to an embodiment of the present invention, the water output by the first water pump device 1 is clear water containing no salt ions with positive dissolution characteristics and no salt ions with negative dissolution characteristics, or softened brine containing no salt ions with negative dissolution characteristics but containing salt ions with positive dissolution characteristics. It should be noted here that the salt ions with positive solubility include, but are not limited to, sodium ions and potassium ions; the salt ions with negative solubility characteristics include but are not limited to magnesium ions and calcium ions. Because the clean water or softened salt water does not contain magnesium ions, calcium ions and the like, when the electric boiler 3 is heated, the corrosion and heat transfer deterioration of the heating surface of the electric boiler 3 caused by the deposition of water scales in the electric boiler 3 can be avoided, and the accidents such as tube explosion and the like are avoided.
The water output by the second water pump device 2 is clear water containing no salt ions with positive dissolution characteristics and no salt ions with negative dissolution characteristics, or softened brine containing no salt ions with negative dissolution characteristics but containing salt ions with positive dissolution characteristics. It should be noted here that the salt ions with positive solubility include, but are not limited to, sodium ions and potassium ions; the salt ions with negative solubility characteristics include but are not limited to magnesium ions and calcium ions. In the steam injection furnace 5, the feed water of the steam injection furnace 5 is allowed to contain a certain amount of salt ions with positive dissolution property, and because the cost for completely removing the salt ions with positive dissolution property is high, the advantage of allowing the salt ions to be contained in the water output by the second water pump device 2 is that the cost can be reduced.
According to one embodiment of the invention, the steam injection furnace 5 is a once-through steam injection furnace. This is because the direct-flow steam injection furnace has the following advantages that firstly, steel can be saved. The direct-flow steam injection furnace has no steam pocket, and can adopt a small-diameter evaporation tube, so that the consumption of steel is obviously reduced. Secondly, the start-up and stop time of the direct-flow steam injection furnace is short. The direct-flow steam injection furnace has no thick-wall steam pocket, and the time for heating and cooling is short when the direct-flow steam injection furnace is started and stopped, thereby shortening the starting and stopping time. Thirdly, the manufacture, the transportation and the installation are convenient. Fourthly, the arrangement of the heating surface is flexible. The working medium is forced to flow in the tube, which is beneficial to heat transfer and flexible arrangement suitable for the shape of the hearth. Fifthly, the method is suitable for high-pressure and ultrahigh-pressure operation (more than 6.0 MPa).
The once-through steam injection boiler includes, but is not limited to, a coal-fired steam injection boiler, a gas-fired steam injection boiler, an oil-fired steam injection boiler, or a combination of multiple steam injection boilers.
According to one embodiment of the invention, the superheater 7 is a platen superheater. The screen superheater has the following characteristics: firstly, absorb some radiation heat in the stove, can reduce furnace outlet gas temperature effectively, prevent convection superheater slagging scorification. Secondly, the distance between screens at the smoke window of the outlet is large, and the sparsely arranged tube screens play a role of condensing the slag. And thirdly, the shielding can reliably work in a smoke temperature area of 1000-1300 ℃, and compared with a convection superheater, the smoke temperature is increased, the heat transfer temperature difference is increased, the heat transfer strength is high, and the heating area can be reduced. Fourthly, the shielding mainly uses radiation and is used together with a convection superheater, so that the steam temperature change characteristic can be improved.
It should be further noted that the first water pump device 1 and the second water pump device 2 both include a common pump and a backup pump, and when the common pump fails, the backup pump can be started to ensure normal operation of the oilfield steam injection boiler system 1000 in which the coupling electric boiler generates steam and hot water. The pipelines in the oilfield steam injection boiler system 1000 for generating steam and hot water by the coupling electric boiler comprise a common pipeline and a standby pipeline, and when the common pipeline fails, such as leakage, the standby pipeline can be started to ensure the normal operation of the oilfield steam injection boiler system 1000 for generating steam and hot water by the coupling electric boiler. The necessary valves and booster pumps are arranged on the pipelines, because the pipeline valves are necessary to control the on-off and flow rate, for example, when a certain common pipeline fails, the valves on the failed common pipeline can be closed in time, and the valves on the standby pipelines are opened; the booster pump is necessary to maintain the pressure balance of the system, so that accidents such as back suction, backflow and the like cannot happen.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An oil field steam injection boiler system for generating steam and hot water by coupling an electric boiler, comprising:
a first water pump device;
a second water pump device;
the electric boiler is connected with the first water pump device and used for receiving and heating the water output by the first water pump device and outputting hot water and steam;
the liquid mixer is respectively connected with the second water pump device and the electric boiler, and both the water output by the second water pump device and the hot water output by the electric boiler enter the liquid mixer and are output by the liquid mixer;
the steam injection furnace is connected with the liquid mixer and is used for receiving the water output by the liquid mixer, generating and outputting steam;
the steam mixer is respectively connected with the electric boiler and the steam injection furnace, and steam output by the electric boiler and steam output by the steam injection furnace both enter the steam mixer and are output by the steam mixer;
the superheater is connected with the steam mixer and used for receiving the steam output by the steam mixer, heating the steam output by the steam mixer into required high-temperature and high-pressure steam and conveying the steam to an oil well;
a first steam line for delivering steam generated by the electric boiler directly to an oil well.
2. The oilfield steam injection boiler system coupled with an electric boiler to generate steam and hot water according to claim 1, wherein the electric boiler and the steam mixer are connected through a second steam pipeline, and one end of the first steam pipeline is communicated with the second steam pipeline.
3. The oilfield steam injection boiler system coupled with an electric boiler to generate steam and hot water according to claim 1, wherein the electric boiler is further connected with a drain pipe.
4. An oilfield steam injection boiler system coupled with an electric boiler to generate steam and hot water according to claim 1, wherein the electric boiler is provided in plurality, and the plurality of electric boilers are arranged in parallel or/and in series.
5. The oilfield steam injection boiler system of claim 1, wherein the electric boiler is a high temperature and high pressure electric heating boiler.
6. An oilfield steam injection boiler system coupled with an electric boiler to generate steam and hot water according to claim 1, wherein the electric boiler is powered by electricity from photovoltaic or/and wind power or industrial electricity from a power grid.
7. The oilfield steam injection boiler system for generating steam and hot water by coupling an electric boiler according to claim 1, wherein the liquid mixer is a thermodynamic device for realizing high-temperature and high-pressure water mixing, and the steam mixer is a thermodynamic device for realizing high-temperature and high-pressure steam mixing.
8. The oilfield steam injection boiler system for generating steam and hot water by coupling an electric boiler according to claim 1, wherein the water output by the first water pump device is clear water without salt ions with positive dissolution characteristics and salt ions with negative dissolution characteristics, or softened saline water without salt ions with negative dissolution characteristics but with salt ions with positive dissolution characteristics; the water output by the second water pump device is clear water which does not contain salt ions with positive dissolution characteristics and salt ions with negative dissolution characteristics, or softened saline water which does not contain salt ions with negative dissolution characteristics but contains salt ions with positive dissolution characteristics.
9. The oilfield steam injection boiler system of claim 1, wherein the steam injection boiler is a once-through steam injection boiler.
10. The oilfield steam injection boiler system for generating steam and hot water coupled with an electric boiler according to claim 1, wherein the superheater is a platen superheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110505312.8A CN113091035B (en) | 2021-05-10 | Oilfield steam injection boiler system for generating steam and hot water by coupling electric boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110505312.8A CN113091035B (en) | 2021-05-10 | Oilfield steam injection boiler system for generating steam and hot water by coupling electric boiler |
Publications (2)
| Publication Number | Publication Date |
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| CN113091035A true CN113091035A (en) | 2021-07-09 |
| CN113091035B CN113091035B (en) | 2024-07-02 |
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| CN117722671A (en) * | 2023-11-02 | 2024-03-19 | 中石化宁波工程有限公司 | System for producing superheated steam by green electric heating coupled boiler and heat supply power generation method |
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