404 results about "Steam injection" patented technology

A molten salt heating direct-flow type wet saturated steam generation system, comprising an evaporation device, a molten salt conveying device, a preheating device, a softened water conveying device, and a dryness adjustment device. The evaporation device is provided with a first heat exchange pipeline and a second heat exchange pipeline; the molten salt conveying device comprises a molten salt conveying apparatus and a molten salt recovery apparatus; the preheating device is provided with a first preheating pipeline, and an outlet of the second heat exchange pipeline is connected to a steam output pipeline; and the dryness adjustment device comprises an adjustment member and a dryness measurement apparatus. According to the steam generation system provided by the present invention, the temperature of softened water and the temperature of molten salt can be adjusted to appropriate ranges, avoiding the crystallization of the molten salt; moreover, the dryness of wet saturated steam can be controlled by means of coarse adjustment and fine adjustment, and the direct-flow type evaporation device is suitable for softened water having poor quality so as to meet the steam injection requirements of oil fields.

The invention discloses an adjustable critical flow injection allocation valve suitable for a thermal production well and a regulation and control method of the adjustable critical flow injection allocation valve. The technical problems that the tool preparation efficiency is low and the like are solved. The device comprises a supporting body, a plurality of mounting grooves are formed in the supporting body, a steam injection valve is arranged in at least one mounting groove, sealing plugs are arranged in the other mounting grooves respectively, an annular steam flow channel is formed in the inner wall of the supporting body, and the mounting grooves communicate with the steam flow channel; the steam injection valve comprises a valve body, a Venturi nozzle, a valve rod, a limiting part and a reducing part, step faces with the outer diameters sequentially reduced from top to bottom are formed on the surface of the reducing part, the different step faces are aligned to the pore throat face by adjusting the position of the valve rod, the area of an annular flow channel can be adjusted, and therefore the injection allocation amount is adjusted. According to the injection allocation valve, the injection allocation amount can be adjusted, secondary punching machining does not need to be conducted on parts, nozzles of multiple specifications and sizes do not need to be prepared either, the tool preparation efficiency is improved, and therefore the operation time efficiency is improved.

The invention relates to the technical field of natural gas separation, in particular to a natural gas pipeline oil mist separation system which comprises a gas inlet end, an oil mist separation mechanism, an exhaust end and an oil dirt discharge mechanism, the gas inlet end comprises a natural gas inlet main pipe and two natural gas inlet branch pipes, and the natural gas inlet branch pipes are connected with a filtering device; the two groups of oil mist separation mechanisms are fixedly mounted on the filtering device and are used for separating and removing oil mist in the natural gas; the exhaust end comprises a natural gas outlet main pipe and two natural gas outlet branch pipes; and the oil mist discharging mechanism is connected with the oil mist separating mechanism and is used for recovering and treating the oil mist. The filtering device comprises a filter, and a filtering assembly composed of a filter element support, a coalescence sintering type filter element and a bearing is arranged in the filtering device. The oil mist separation mechanism comprises a high-pressure steam source, a steam conveying pipe, a steam branch pipe and a blade, and oil mist separation is achieved through steam injection. Oil mist in natural gas can be effectively separated, and the filtering efficiency and the natural gas quality are improved.

The invention relates to the technical field of chemical reaction equipment, in particular to a pulse intermittent water vapor bottom blowing coupling mechanical stirring enhanced mixing device which comprises a tank body, a sealing cover is mounted on the top surface of the tank body, a stirring assembly used for stirring the interior of the tank body is mounted on the sealing cover, the stirring assembly extends into the tank body, and the stirring assembly is connected with the tank body. An air outlet head is arranged at the bottom in the tank body, the air outlet head is communicated with a steam generation unit through an air supply pipe, and the steam generation unit is electrically connected with a pulse control unit used for sending variable frequency signals with adjustable pulse frequency to the steam generation unit. The steam injection frequency is controlled through the pulse control unit, the use amount of the steam is reduced, local high temperature generated by the system during continuous injection is avoided, the temperature is more uniform, meanwhile, convection can be further strengthened through nonlinear input, the periodic structure of the system is damaged, and the service life of the system is prolonged. And more chaotic flow regions are formed to enhance mixing and heat transfer efficiency, so that the production efficiency is improved, and the energy loss is reduced.

The invention discloses a uniform steam injection oil extraction pipe column which comprises an oil pipe, packers are arranged at the top and the bottom of each oil layer, the packers are located between the oil layers and a sleeve, the packers are fixedly connected with the oil pipe, one end of an adjusting screen pipe is connected with the packers, the other end of the adjusting screen pipe is connected with the oil pipe, an oil extraction valve is fixedly connected with the oil pipe, and a first screwed plug is installed at one end of the oil pipe. Oil layers are sleeved outside the oil pipe, and packers are arranged at the two ends of each oil layer; a first screwed plug is installed at one end of the oil pipe. According to the invention, the integration of injection and production is realized, the utilization time rate of an oil well is improved, the operation cost is reduced, and the adverse effect on the ground environment in the operation process is further reduced. Mutual interference between the high-pressure oil layer and the low-pressure oil layer in the oil extraction process is avoided, the reasonable steam injection amount of an oil reservoir is achieved, the oil reservoir development effect is greatly improved, and certain reference significance is achieved for development of complex oil reservoirs.

The invention provides a steam ejector and an ejection method, and relates to the technical field of vacuum suction, the steam ejector comprises a negative suction pipeline, a steam ejection pipe is mounted on a square flange on the negative suction pipeline, a steam generation assembly is mounted at one end of the steam ejection pipe, and a noise elimination and speed reduction assembly is mounted at the other end of the steam ejection pipe; and the steam adjusting assembly is used for adjusting steam injected into the steam injection pipe. The technical problem that a steam ejector lacks a structure for reducing the temperature, flow velocity and noise of output steam is solved.

The invention provides a method and a device for predicting a steam cavity in steam flooding by using an overlap factor, and belongs to the technical field of oil field oil extraction. The method comprises the following steps: determining an incidence relation between wellhead production characteristics of a first production well and a well bottom average temperature value, and determining a well bottom average temperature value of a second production well according to wellhead production characteristics of the second production well by utilizing the incidence relation; determining overlap factors of different displacement layer sections of the first production well; weighting the well bottom average temperature value of the second production well by using the overlay factor of each displacement layer section, and obtaining the well bottom correction temperature of each displacement layer section in the second production well in a one-to-one correspondence manner; and comparing the well bottom correction temperature of the second production well with the well bottom temperature of the steam injection well in the well group where the second production well is located, comparing the well bottom pressure of the second production well with the well bottom pressure of the steam injection well, and identifying the steam cavity of each displacement layer section of the second production well. By means of the method, rapid, accurate and low-cost recognition of the steam cavity is achieved.

Refrigerant circuit of a combined refrigeration system and heat pump with integrated steam injection circuit, wherein a 3-way valve (2) is arranged as a distribution point in the refrigerant circuit after a compressor (1), and an outdoor condenser / gas cooler (3), a main internal heat exchanger (5) and a check valve (6) as well as a connection point (19) are arranged in a refrigeration system line, and an indoor condenser / gas cooler (4) and a check valve (6) are arranged in a heat pump line,after which the heat pump line is joined to the refrigeration system line at the connection point (19) and the condensed or cooled refrigerant is subsequently led via an expansion device vapor injection (7) via the cold side of a secondary internal heat exchanger (8) to a medium-pressure chiller (9) and subsequently via a direct steam injection connection (18) into the compressor (1) and / or the condensed or cooled refrigerant is led via the warm side of the secondary internal heat exchanger (8) to an evaporator (12) and / or to a low-pressure chiller (13) before the refrigerant vapor is led via a liquid separator suction side (14) and the main internal heat exchanger (5) on the cold side to the suction side of the compressor (1).

The invention discloses a flue gas water-based three-phase foam system and a profile control method, the flue gas water-based three-phase foam system comprises dispersed-phase gas, suspended-phase solid particles and continuous-phase liquid, the liquid comprises the following components in percentage by weight: 0.5-2.0 wt% of a foaming agent, 0.05-0.5 wt% of a stabilizer, 0.05-0.2 wt% of a thickening agent, 0.1-0.8 wt% of a suspending agent, 0.3-1.0 wt% of inorganic salt and the balance of liquid preparation water; the gas comprises flue gas or mixed gas of one or at least two of nitrogen, natural gas, carbon dioxide, air and flue gas and the flue gas; the solid particles comprise one or a mixture of at least two of silicon dioxide particles, montmorillonite particles, bentonite particles, kaolin particles and fly ash particles, and the particle sizes of the solid particles are from nanometer to micrometer. According to the method, the flue gas discharged by the steam-injection boiler is captured and treated and then is injected into the stratum together with the water-based three-phase foam system and the steam segmented plug according to a certain proportion to assist in steam recovery of the thickened oil, so that the recovery rate of the thickened oil can be increased, the emission of greenhouse gases can be reduced, the capture, storage and utilization of CO2 can be realized, and the environmental protection situation requirements of carbon peak reaching and green development are met.

The invention relates to a method for treating shale oil crack wall surfaces by using carbon nanotubes to increase the heat transfer capacity of a reservoir, a plurality of horizontal wells are drilled from the ground, the horizontal sections of the horizontal wells form three parallel well rows, the uppermost well row and the lowermost well row are heating wells, and the middle well row is a production well. The fracturing fluid carrying the proppant is injected into the heating well and the production well with the displacement greatly exceeding the stratum absorption capacity, the bottom hole pressure is larger than the stratum fracture pressure, hydraulic fracturing is carried out, a tensional fracture area and a communication well group are generated, and meanwhile it is guaranteed that fractures are not closed after the proppant is filled. Under the condition that the pressure is lower than the formation fracture pressure, a weak acid solution is slowly squeezed into the heating well and the production well, the well wall and the crack wall face are treated, and a large number of corrosion micropores are formed. And under the condition that the pressure is lower than the stratum fracture pressure, a weak acid solution added with the carbon nano tubes is squeezed into the heating well and the production well, so that the carbon nano tubes are adsorbed or filled in the corrosion micropores, and the micropores where the carbon nano tubes are attached are formed. And high-temperature steam is circularly introduced into the heating well and the production well to heat the oil shale stratum. After heating for a certain time, stopping steam injection of the production well, and changing into production; and continuously injecting steam into the heating well. The method is suitable for an oil shale underground in-situ conversion exploitation technology, and is also suitable for geothermal exploitation and heavy oil thermal exploitation.

The invention relates to the technical field of boiler operation management, in particular to a boiler soot blowing steam consumption multi-dimensional data analysis system which comprises a dynamic database construction module, a steam consumption calculation model construction module, an evaluation module and an optimization strategy generation module. The dynamic database construction module is used for cooperatively acquiring the ash scale thickness value of the heating surface partition of the boiler through an infrared thermal imager and a sound wave thickness measuring device, and realizing structured time sequence data fusion in combination with steam parameters and working condition parameters; the steam consumption calculation model building module is used for building a multi-dimensional consumption data set based on space, time and energy efficiency dimensions; the evaluation module outputs a unit ash scale removal steam consumption value, an invalid steam injection proportion value and a regional energy efficiency deviation coefficient value; the optimization strategy generation module generates a soot blowing pressure gradient adjustment strategy and a steam saturation temperature compensation strategy through index correlation analysis, fine evaluation and control optimization of soot blowing energy efficiency can be achieved, and the boiler operation efficiency and the steam utilization rate are improved.

The invention provides an underground gas-steam generator for heavy oil thermal recovery and a medium flow calculation method.The generator comprises a combustion system and a water vapor system and mainly comprises a gas inlet device, a mixer, an ignition device, a combustion chamber, a vaporizing chamber, a cooling device, a mixed gas outlet and the like. The gas-steam generator is arranged underground, water is directly sprayed into smoke generated by combustion of fuel and a combustion improver through a ground pipeline at the well bottom, the fuel and the combustion improver are input underground through the ground pipeline, and smoke exhaust heat loss and transmission heat loss generated in the steam injection process of a conventional ground boiler are eliminated; the ceramic layer with the heat insulation effect is arranged on the outer wall face of the combustion chamber, cooling water enters from the rear end of the combustion chamber, a cooling water film is formed on the outer wall face of the ceramic layer and used for cooling the combustion chamber of the gas-steam generator, and safe operation of the gas-steam generator is guaranteed.

The present invention provides a water-vapor heat exchange system, a movable steam injection boiler and a steam injection method thereof, which include a water heat exchanger located between a water pump and the convection section of the boiler, a flue gas heat exchanger located in the convection section of the boiler, and a radiation section heat exchanger located in the radiation section of the boiler. The water heat exchanger includes an inner heat exchanger tube and an outer heat exchanger tube that exchange heat with each other and are respectively used for the circulation of water medium. The inner heat exchanger tube, the flue gas heat exchanger, the outer heat exchanger tube and the radiation section heat exchanger are sequentially connected along the direction of water medium circulation. After the water medium absorbs heat in the convection section, it enters the water heat exchanger as a heat source to heat the water medium that has not entered the convection section, so that its temperature rises and exceeds the dew point temperature, so as to avoid the low-temperature corrosion of the finned tube by the flue gas. A superheat section is connected at the flue gas outlet of the radiation section, and a superheat section heat exchanger for further heating and evaporating the water medium is arranged in the superheat section. The wet saturated steam coming out of the radiation section is continuously heated and evaporated through the superheat section heat exchanger, ensuring the steam injection effect on the oil well.

The invention relates to a boiler operation parameter optimization method and system for multi-fuel combustion of multiple solid wastes, and the method comprises the following steps: (1) multi-source data collection: obtaining the heat value, the water content, the chlorine-sulfur ratio and the heavy metal content of the solid wastes in real time through a spectrum analyzer, a visual recognition system and an online sensor; (2) intelligent compatibility optimization: calculating a solid waste mixing ratio by adopting a genetic algorithm based on calorific value balance and pollutant inhibition targets, and controlling a Cl / S molar ratio to be 1.2-1.8 and the alkali metal content to be 1t; 50%; (3) pretreatment and drying: the water content gt; and carrying out microwave-steam combined drying on 25% of solid waste, and dynamically adjusting microwave power, steam injection time and the like. The method has the advantages that through the technical integration of multi-source data fusion, intelligent algorithm optimization and digital twinborn verification, a solid waste co-combustion full-process optimization system is constructed, and ultralow emission of pollutants and safe and economical operation are achieved while the energy utilization rate is increased.

The invention discloses a multiphase flow steam injection simulation experiment device for a long horizontal well, which relates to the technical field of horizontal well exploitation and comprises N sections of reservoir box bodies arranged in sequence, horizontal steam injection pipe simulation devices arranged in the N sections of reservoir box bodies, and a steam injection simulation system communicated with the first section of horizontal steam injection pipe simulation device, the transparent visual observation section is arranged on a pipeline at an outlet of the horizontal steam injection pipe simulation device, the high-speed camera shooting system is used for shooting fluid in the transparent visual observation section at a high speed, and the control terminal is used for performing flow pattern analysis on information acquired by the high-speed camera shooting system. According to the method, the N sections of mutually independent reservoir box structures are adopted, differential geological parameters can be synchronously loaded to the boxes, the influences of different reservoir physical properties on the development effect can be synchronously compared, and the optimal mining scheme can be rapidly screened through parameter combination optimization. And a key theoretical basis and an engineering verification means are provided for refined regulation and control of a heavy oil thermal recovery process through flow pattern analysis.

The invention provides an efficient gas mixer and method for nitrogen-free combustion of a steam-injection boiler, a gas mixture comprises a support, a premixer and a main mixer, the premixer and the main mixer are both arranged on the support, one end of the premixer is communicated with an oxygen inlet pipe and a carbon dioxide inlet pipe respectively, the other end of the premixer is provided with a gas distributor, and the gas distributor is communicated with the main mixer. The gas distributor is communicated with a main mixer, and the main mixer is communicated with a gas collector. According to the premixer, the oblique angle is adopted to change the flow direction of gas, so that carbon dioxide and oxygen flow oppositely after passing through the oblique angle and are in a turbulent flow state in the premixer, and the purpose of premixing is achieved. The inner part of the main mixer adopts a corrugated sheet type, and the zigzag corrugated sheet can change the flow direction of the gas for multiple times and increase the turbulence of the gas, so that the carbon dioxide and the oxygen are further uniformly mixed; the gas collector collects uniformly fed mixed gas and sends the mixed gas to the outlet pipe of the mixer, and meanwhile, the flat plate of the collector supports the corrugated sheet to prevent the corrugated sheet from being blown into the outlet pipe of the mixer by the gas to cause blockage.

The utility model relates to the technical field of thickened oil recovery, in particular to a sand prevention injection and production valve which comprises a central pipe, a steam injection hole and an oil inlet hole are formed in the pipe wall of the central pipe, a sand filtering assembly is sleeved outside the central pipe, the central pipe is in sealed butt joint with the upper end and the lower end of the sand filtering assembly, and an annular space is formed between the central pipe and the sand filtering assembly. A one-way oil inlet valve communicated with the oil inlet hole is arranged in the annular space, the center pipe is further connected with a blocking structure used for blocking the steam injection hole, and the blocking structure can slide in the axial direction of the center pipe to expose the steam injection hole under well outside hydraulic operation. When the sand prevention injection and production valve is assembled into an injection and production pipe column for layered injection and production operation, steam injection, oil production and sand filtering can be achieved at the same time, additional oil inlet or sand prevention devices do not need to be arranged on the injection and production pipe column, and therefore the assembled injection and production pipe column is short in axial length, simple in structure and capable of being suitable for injection and production operation of oil layers with different layered thicknesses.

The invention discloses a thick oil well microwave-assisted steam oil extraction device and a using method thereof, the thick oil well microwave-assisted steam oil extraction device comprises an oil extraction lifting system connected with a steam injection system, and the thick oil well microwave-assisted steam oil extraction device is characterized by further comprising a microwave heating system connected with a shaft pipe column of the oil extraction lifting system. The microwave heating system comprises a microwave generating device, a microwave waveguide tube bundle and a microwave heating short section which are connected in sequence; the microwave generating and transmitting device can generate microwaves, and the microwaves are transmitted to the microwave heating short section through the microwave waveguide tube bundle. The temperature and dryness of high-temperature steam can be maintained when the high-temperature steam is conveyed along a shaft, the fluidity of thickened oil during extraction can be improved, and the requirement for heat preservation and dryness protection in the whole steam huff and puff extraction process of the thickened oil can be met.

An adjustable high-temperature steam directional permeation device for a sintering round roller stock bin comprises a directional permeation spray gun system which comprises an adjustable spray gun; one end of the adjustable spray gun is located in the round roller stock bin, and the acting force of materials in the round roller stock bin on the adjustable spray gun at least comprises a component which is in the axial direction of the adjustable spray gun and points to the inner side of the round roller stock bin; the other end of the adjustable spray gun is located outside the round roller stock bin and used for being connected with a steam source. According to the device, the adjustable spray gun is inserted into the round roller bin to conduct steam injection on materials, steam directly reaches a core area of a material layer, steam heat is almost completely absorbed by the materials, heat energy loss is low, and the temperature of the materials is greatly increased; the material is heated by steam from the inner layer of the material, and the thickness of an over-wet layer is obviously reduced because the steam is uniformly dispersed. The spray gun device solves the problem that in the prior art, a spray gun device in a round roller stock bin is poor in preheating effect.

Various embodiments of the present disclosure include a system, method, and apparatus for increased control of steam injection for use in oil and gas recovery in a well. Embodiments can comprise a plurality of controllable zones of injection disposed in the well. The plurality of controllable zones include a primary conduit that houses a plurality of concentric conduits of decreasing diameter disposed inside of the primary conduit. In some embodiments, each of the concentric conduits includes a proximal end and a distal end. In some embodiments, each of the plurality of concentric conduits are fluidly sealed from one another from their respective proximal end to distal end.

The invention relates to the technical field of rocket launching, in particular to a steam protection rocket launching system which comprises a steam energy storage system, a steam conveying system, a steam releasing system and a launching rack structure. The steam energy storage system comprises a steam boiler, a steam pressure accumulator and a steam energy storage control unit and is used for preparing and storing high-pressure steam before rocket launching. The steam conveying system comprises a steam blending table and a steam supply pipeline and is used for conveying high-pressure steam in the steam pressure accumulator to the steam release system; the steam release system comprises a steam injection unit and a steam injection control system and is used for releasing steam when the rocket is ignited, launched or recovered, forming a steam protection air curtain and reducing thermal shock of high-temperature airflow on the structure. By establishing the high-pressure steam protection air curtain, active protection of structural parts, pipeline parts, hydraulic parts and other parts of the rocket launching system influenced by the gas tail flame area of the rocket engine is achieved, and the durability and reliability of the launching system are improved.

A vehicle refrigerant system using hot gas bypass and steam injection is provided. A steam injection refrigerant system includes a compressor comprising at least a first stage input and a second stage input and an output arranged to provide an output steam refrigerant. A condenser is fluidly coupled to the output of the compressor to receive the output vapor refrigerant, and an evaporator is fluidly coupled between the condenser and the first stage input. The evaporator is arranged to provide refrigerant in vapor form to a first stage input of the compressor. A cooler is fluidly coupled between the condenser and both the first stage input and the second stage input. The chiller is arranged to inject refrigerant in the form of steam into the first stage input or the second stage input. A bypass branch fluidly couples the output of the compressor to the first stage input of the compressor to provide at least some output vapor refrigerant to the first stage input without routing through the condenser, evaporator, and cooler.

This invention relates to the field of concrete process temperature control technology, and discloses a method and system for continuous regulation of the concrete steam curing process based on temperature gradient feedback. The method includes: constructing a steam curing temperature time-series dataset; reconstructing the temperature field inside the steam curing kiln; compensating for ambient temperature on the original temperature measurement data of the component surface; forming a steam regulating valve opening control sequence; and performing online parameter correction. Compared to existing technologies that directly use the component surface temperature measurement value as the steam valve regulation feedback, this invention addresses the technical problem of failing to obtain an effective surface temperature gradient reflecting the component's hydration heat release state, especially under conditions of uneven steam injection and localized heat dissipation differences within the steam curing kiln. This application improves the accuracy of temperature gradient feedback control during the concrete steam curing process by reconstructing the temperature field inside the steam curing kiln and incorporating the estimated ambient temperature at the component surface measurement points into the surface temperature compensation and differential gradient calculation process.

This application discloses a steam distribution method and device based on machine learning. The method includes: establishing a downhole comprehensive reservoir model using a sequential Gaussian simulation method based on the actual downhole formation points of a selected target well; establishing a heavy oil thermal recovery data prediction model using a linear model based on the simulation parameter values ​​of the simulated formation points in the downhole comprehensive reservoir model; determining the total amount of steam to be allocated to the target well in real time based on the heavy oil thermal recovery data prediction model and a net present value formula, and determining the steam utilization rate based on the total steam injection volume. This application establishes a heavy oil thermal recovery data prediction model through machine learning, which can achieve real-time optimization of steam distribution, rationally allocate gas injection parameters for each oil production well, avoid resource waste, and effectively improve the production efficiency of heavy oil reservoirs.

The invention relates to a well pattern combination method using super heavy oil difficult-to-exploit reserves, and belongs to the technical field of oil exploitation. The method comprises the following specific steps: step 1, analyzing a main reason that the vertical well is difficult to use in development; 2, when the development of the vertical well is poor, horizontal well development is deployed; and thirdly, the steam injection mode is adjusted on the basis of the second step. According to the method, fishbone horizontal well and horizontal well vertical staggered superposition type well pattern deployment is adopted, meanwhile, a branch horizontal well and horizontal well staggered superposition combined huff and puff mode is created on the matched technology, the one-time tubular column pump circulation steam injection technology is assisted, steam cavity balanced expansion is achieved, overall heating of an oil reservoir is facilitated, and the oil reservoir quality is improved. And the transformation of the steam wave and volume from'point 'to'body' is accelerated, and the oil reservoir temperature is gradually increased, so that the steam development effect is improved, and the utilization of the difficult-to-exploit reserves of the super heavy oil reservoir is realized.

To provide an electric heater type soil purification device capable of reducing number of heating wells installed in a processing target area, and capable of enhancing heating efficiency.SOLUTION: A soil purification device includes: a heating well 10 where a mesh pipe extending along the depth direction to the aquifer EW is arranged in the processing target area E, water vapor is generated by a submerged heater 11 provided at the bottom, and which directly injects the water vapor into the surrounding soil; a steam injection well 20 which is connected to the heating well 10 through water vapor connecting piping 21 while a mesh pipe which extends along the depth direction to the bottom of the unsaturated zone in a soil EG is arranged around the heating well 10, and which introduces water vapor generated by the heating well 10 to directly inject it into the surrounding soil; and one or more collection wells 30 where a mesh pipe extending along the depth direction to the bottom of the unsaturated zone is arranged around the heating well 10 and the steam injection well 20 to collect steam containing target substances evaporated due to the heating of the water vapor.SELECTED DRAWING: Figure 1

The invention relates to the field of oil field steam injection boiler equipment, in particular to a high-capacity subcritical coal-fired CFB type oil field steam injection boiler, the highest pressure of the boiler can reach subcritical pressure, the boiler comprises a steel frame, and a boiler barrel, a hearth water cooling wall and a flue are arranged on the steel frame. A superheater, an upper-level economizer, SCR equipment, a lower-level economizer and an air preheater are sequentially arranged on the flue, a softened water pipeline used for conveying oilfield sewage is arranged on the steel frame, the softened water pipeline is sequentially communicated with the lower-level economizer, the upper-level economizer and a bottom coil pipe of a hearth water cooling wall, and the middle and a top coil pipe of the hearth water cooling wall are communicated with a boiler barrel. A separating assembly used for separating saline water and steam is arranged in the boiler barrel, a steam pipeline is communicated between the top of the boiler barrel and the superheater, the bottom of the boiler barrel is communicated with a salt discharging pipe, and a pressure measuring piece used for monitoring pressure changes in a coil pipe is arranged on the coil pipe of the hearth water cooling wall. The method has the effect of reducing the equipment investment cost.

The application discloses a kind of composite type steam injection vacuum pump unit of green energy utilization system, comprising: vacuum crystallizer, first condenser, for the condensation unloading of condensable gas in mixed gas in vacuum crystallizer, second injection pump, its mixed gas inlet is connected with the primary side outlet of first condenser, second condenser, for the condensation unloading of condensable gas in mixed gas being extracted by second injection pump and being sent into it, third injection pump, its mixed gas inlet is connected with the primary side outlet of second condenser, third condenser, for the condensation unloading of condensable gas in mixed gas being extracted by third injection pump and being sent into it, wherein, cooling water system is natural water source, cooling tower or refrigeration equipment, and water supply water temperature is 1.0-15.0 degrees;The application can utilize natural water source to achieve the effect of reducing steam consumption, reduce cost, under the condition of 1.0-15.0 degrees low temperature, can save steam volume by 85-90% at most.

The invention discloses a system and a method for upgrading and utilizing ring cooling medium and low temperature waste gas. The method comprises the following steps: sequentially carrying out heat and oxygen supplementation treatment, stepped heat exchange and selective split-flow steam supplementation treatment on sintering ring cold medium and low temperature waste gas to obtain oxygen-enriched hot waste gas and oxygen-enriched steam-enriched hot waste gas which can be directly used for sintering, and intermediate products such as high-parameter steam and industrial hot water; therefore, the waste heat of the sintering ring cooling medium-temperature and low-temperature waste gas is recovered at low cost and high efficiency, and meanwhile, the discharge amount of the waste gas is also remarkably reduced; and further, the oxygen-enriched hot waste gas and the oxygen-enriched steam-enriched hot waste gas are respectively returned to the sintering front-end material surface and the sintering rear-end material surface for oxygen-enriched hot air sintering and oxygen-enriched steam injection sintering, and the quality index of a sintered ore product is further improved.

An embodiment of the present invention discloses a simulation method, device, equipment and medium for SAGD development of oil sand reservoirs. The simulation method for SAGD development of oil sand reservoirs includes: constructing a branched well model according to preset branched well parameters; wherein the branched well parameters include at least one of the following: the number of branched wellbores, the length of a single branched wellbore, the length of the main wellbore, the equivalent wellbore diameter of the branched wellbore, and the branched wellbore angle; constructing an oil sand reservoir physical model including the branched well model; based on the SAGD technology, injecting steam into the oil sand reservoir physical model to establish thermal connectivity between the steam injection pipeline and the production pipeline in the branched well model; accessing the steam injection pipeline after the thermal connectivity reaches the steam injection parameters, simulating the heavy oil production process, and maintaining the monitoring of the simulated production parameters. The embodiment of the present invention realizes the accurate simulation of the steam chamber development law and the degree of utilization of marginal reserves in the SAGD development of oil sand reservoirs with branched wells, thereby improving the heavy oil development efficiency on site.