A device and method for recycling microbial enhanced oil recovery product.

Abstract

This invention discloses a device and method for recycling microbial enhanced oil recovery (EOR) product fluid. As the spiral blades continue to rotate, the fluid is continuously transported to the left. During the counter-clockwise rotation of the cam driven by the connecting shaft, a rotating roller on the fixed rod rolls outside the cam. As the cam rotates, it lifts the unblocking assembly via the rotating roller. When the highest point of the cam disengages from the rotating roller, the support of the spring in the unblocking assembly causes the support to drive two rollers to descend rapidly and strike the separation screen cylinder. This process repeats continuously. As the cam continues to rotate, the rollers intermittently and continuously strike the separation screen cylinder, shaking off impurities from the liquid and sand filter holes. This eliminates the need for sedimentation separation and adsorption-based sand separation methods, preventing blockages in pipelines and resource waste, and improving the unblocking effect. Simultaneously, the oil and impurities can be separated during the oil-liquid separation process, facilitating multi-stage separation of the product fluid.

Description

Technical Field

[0001] This invention belongs to the field of microbial enhanced oil recovery technology, specifically a device and method for recycling microbial enhanced oil recovery product. Background Technology

[0002] Microbial enhanced oil recovery (MEOR) technology refers to the technology of using microorganisms and their metabolites to improve crude oil production and recovery rate. Compared with other tertiary oil recovery technologies, microbial technology has the characteristics of wide applicability, simple process, good economic benefits, and no pollution, and has good application prospects, thus attracting more and more attention.

[0003] Preliminary field trials and monitoring of microbial enhanced oil recovery (MEOR) revealed that the produced fluid contained some unconsumed nutrients, microorganisms, and their metabolites. In particular, the injected exogenous bacteria, after being acclimated to the reservoir under high temperature and pressure, exhibited significantly stronger growth and metabolic capabilities than unacclimated exogenous bacteria. Currently, the produced fluid from wells undergoing MEOR is separated into oil and water at the joint station, and bactericides are added to prevent the proliferation of corrosive bacteria such as sulfate-reducing bacteria. Furthermore, biochemical treatment is used to reduce the COD and BOD levels in the water. These processes lead to a sharp decrease in nutrients and microorganisms in the MEOR produced fluid, resulting in a waste of these resources.

[0004] After appropriate treatment, the remaining nutrients, microorganisms and their metabolites from the microbial flooding produced fluid can be reinjected into the formation from the injection well, thereby enabling further utilization of microorganisms and nutrients. This reduces the investment cost of field microbial flooding trials and effectively avoids the difficulty of post-treatment, making it an economical and feasible method.

[0005] However, once microorganisms are extracted from oil wells and brought to the surface, the temperature changes, which significantly impacts their growth and reproduction. Most microorganisms enter a dormant state at low temperatures, with almost all metabolic activity ceasing, thus inhibiting their growth and reproduction. Therefore, a high-temperature recycling device for microbial flooding produced fluid is needed to ensure the activity of the microorganisms and maximize their utilization.

[0006] After literature review, the article "Research on the Recycling Method of Produced Fluids from Microbial Enhanced Oil Recovery" explored the feasibility of recycling produced fluids from microbial enhanced oil recovery in the Sixth Oilfield of Xinjiang Oilfield. Based on the analysis of the composition and concentration of the produced fluids, physical simulation methods were used to study the effects of four recycling methods on oil recovery efficiency: direct reinjection, injection after nutrient addition, surface-scale culture injection, and injection into new oil reservoirs. Experiments showed that the nutrient concentration in the produced fluid was only about 10% of the injection concentration, which was insufficient for direct injection, requiring nutrient addition to further improve oil recovery. Comparison of the four recycling methods revealed that beneficial bacteria and their metabolites could be recycled, with surface-scale culture of the produced fluid showing the best oil recovery effect, reaching a bacterial concentration of 2.1 × 10⁻⁶. 8 The surface tension decreased from 71.6 mN / m to 55.9 mN / m, resulting in a 14.2% increase in oil recovery. The findings provide a reference for the recycling of produced fluids and confirm the feasibility of recycling microbial enhanced oil recovery (DEOR) produced fluids. However, this article only conducted laboratory experiments, without field application or providing a microbial recycling device.

[0007] Patent 201110364266.0 discloses a method for circulating and treating produced fluids in microbial enhanced oil recovery (DEOR), including steps such as separating oil, gas, and water mixtures in DEOR reservoirs, treating produced water, detecting nutrients in the produced water, identifying microorganisms and their metabolites, and reinjecting nutrients and microorganisms. The drawback is that this patent only relates to the DEOR produced fluid reinjection process and does not address high-temperature, high-pressure reinjection devices.

[0008] CN201621455810.7 discloses a treatment system for high-temperature oil well produced fluid, belonging to the field of oilfield gathering and transportation. The system includes: a first heat exchanger, with its inlet connected to the oil supply pipeline of the high-temperature oil well produced fluid; a second heat exchanger, with its circulating water outlet connected to the circulating water inlet of the first heat exchanger via a hot water pipeline, and its circulating water inlet connected to the circulating water outlet of the first heat exchanger via a hot water pipeline; a three-phase separator connected to the outlet of the first heat exchanger via an oil pipeline; a sludge tank connected to a sludge outlet at the bottom of the first heat exchanger via a sludge pipeline; and thermometers installed on both the oil supply pipeline and the oil pipeline. This treatment system can effectively recover and utilize the heat energy of the high-temperature oil well produced fluid without causing blockage of the three-phase separator. However, in practical applications, the system, which includes a drain outlet, drain pipeline, and drain pool, still struggles to effectively separate impurities from the liquid. Over time, these impurities can clog various discharge pipelines, affecting the normal circulation of the produced liquid. Furthermore, the presence of impurities in the liquid makes subsequent oil-liquid separation difficult and hinders multi-stage separation of the produced liquid.

[0009] CN201720246294.5 discloses an online sand removal device at the bottom of a horizontal oil-gas-water three-phase separator. The horizontal oil-gas-water three-phase separator has an oil pool baffle that divides the interior into an oil-water separation zone and an oil accumulation zone. The online sand removal device is located at the bottom of the horizontal oil-gas-water three-phase separator, corresponding to the oil-water separation zone. The online sand removal device includes: a water inlet pipe, multiple sand separating plates, at least one sand accumulation plate, at least one flow stabilizing plate, and a sand suction pipe. This utility model's functional modules are tightly integrated, occupying a small volume of the three-phase separator; it has minimal impact on the normal oil-gas-water separation process inside the separator; it can realize online removal of solid impurities inside the separator and automatic control of this process, reducing manual intervention costs and improving production efficiency. However, although the device can achieve a certain anti-clogging effect by stirring and adsorbing sand and gravel, some oil and water liquids are extracted together during the cleaning process, resulting in the waste of some resources. Moreover, stirring during the sedimentation process can easily affect the quality of the liquid after separation, so the treatment effect is not ideal. Summary of the Invention

[0010] This invention addresses the shortcomings of existing technologies by providing a device and method for recycling microbial enhanced oil recovery products. The device features simple structure, low cost, and high processing efficiency.

[0011] To achieve the above objectives, in a first aspect, the present invention discloses a microbial enhanced oil recovery product recycling device. The device includes a processing tank and a separation component. The top of the processing tank is fixed to the separation component via two support legs. One side of the top of the separation component is provided with a product injection pipe. One side of the separation component is connected to a water receiving hood via a U-shaped pipe. The water receiving hood is connected to one side of the processing tank. A separation sieve cylinder is provided inside the processing tank. The separation sieve cylinder is engaged with two sides inside the processing tank via two bushings. A spiral blade is provided inside the separation sieve cylinder. Two gear rings are engaged with the outside of the separation sieve cylinder. Two gears mesh on the gear rings. The two gears are engaged on the same connecting shaft. The connecting shaft is located inside the processing tank. Four cams are provided outside the connecting shaft. The cams overlap with rotating rollers. All four rotating rollers are mounted on a fixed rod.

[0012] As a further embodiment of the present invention: five unblocking components are snapped onto the outside of the fixing rod, the top of the unblocking components is fixed to the top of the processing box, the bottom of the processing box is provided with a liquid storage box and a miscellaneous component, and the top of the processing box is provided with an exhaust component.

[0013] As a further embodiment of the present invention: the separation component includes a separation box, a fixed shaft is provided inside the separation box, a screw conveyor assembly is provided outside the fixed shaft, a separation plate is provided at the bottom inside the separation box, the separation plate is used to separate large pieces of sand and gravel from the liquid produced, and a slag discharge valve is provided on one side of the separation box.

[0014] As a further aspect of the present invention: the unblocking assembly includes a telescopic rod, the top end of which is fixedly connected to the top of the processing box, a spring is sleeved on the telescopic rod, the bottom end of which is fixed to a bracket, the bracket is snapped onto the outside of the fixed rod, and the bottom of the bracket is provided with two rollers, both of which overlap with the separating screen cylinder.

[0015] As a further embodiment of the present invention: a driving component is provided on one side of the water receiving cover, the driving component is connected to the driven wheel via a transmission belt, and the driven wheel is fixedly connected to one end of a fixed shaft.

[0016] As a further aspect of the present invention: the drive assembly includes a fixed base, one side of which is fixed to a water-receiving cover, a motor is snapped into the fixed base, and a drive wheel is fixedly connected to the output shaft of the motor.

[0017] As a further aspect of the present invention: a heating ring is provided outside the separating screen cylinder, the bottom of the heating ring is fixed to the bottom of the processing box, and a plurality of liquid filter holes and sand filter holes are provided outside the separating screen cylinder.

[0018] As a further aspect of the present invention: the liquid storage box is provided with a defoaming component, and a heating cylinder is provided below the defoaming component, the bottom of the heating cylinder being fixed to the bottom of the liquid storage box.

[0019] As a further aspect of the present invention: the defoaming component includes an arc-shaped plate, which is disposed inside the liquid storage box. Both sides of the arc-shaped plate are provided with leakage holes, and a plurality of defoaming baffles are provided outside the arc-shaped plate. Both sides of the defoaming baffles are designed with bevels.

[0020] As a further aspect of the present invention: a heating ring is provided inside the heating cylinder, and several water inlet holes are provided at the bottom outside the heating cylinder. A water guide valve pipe is connected to the bottom of the heating cylinder, and one end of the water guide valve pipe is connected to a dosing assembly.

[0021] As a further aspect of the present invention: the impurity storage component includes an impurity box, which is snapped into the bottom of the processing box, and a discharge valve pipe is provided below the outside of the impurity box.

[0022] As a further aspect of the present invention: the dosing assembly includes an injection box, a circulation outlet pipe is provided at one end of the injection box away from the water guide valve pipe, and a dosing valve pipe is provided at the top of the injection box.

[0023] As a further aspect of the present invention: the exhaust assembly includes a gas reservoir, which is snapped onto the top of the processing tank, and a natural gas discharge valve pipe is provided on the top of the gas reservoir.

[0024] As a further aspect of the present invention: the bottom of the liquid storage box is provided with an oil guiding assembly, the oil guiding assembly includes an oil guiding valve tube, the oil guiding valve tube is snapped into the bottom of the liquid storage box, a telescopic tube is sleeved inside the oil guiding valve tube, and a float ball is provided at the top of the telescopic tube.

[0025] As a further aspect of the present invention: the processing box is provided with a cavity, the cavity being connected to a medium inlet pipe and a medium outlet pipe, the medium inlet pipe and the medium outlet pipe being respectively located at the top and bottom of the processing box.

[0026] Secondly, the present invention discloses a method for using a microbial enhanced oil recovery product recycling device, the method comprising the following steps:

[0027] S1. Pretreatment of the produced liquid:

[0028] When the produced liquid is circulated, it enters the separation box through the produced liquid injection pipe. At this time, the motor drives the drive wheel to rotate, and the drive wheel drives the driven wheel, fixed shaft and auger cutter group to rotate through the transmission belt. Since the produced liquid contains some blocky sand and gravel, the auger cutter group can break up the blocky sand and gravel when driving the produced liquid to the right. The liquid is accumulated at the bottom of the separation box through the separation plate, and the separated sand and gravel continue to be transported to the right and discharged from the slag discharge valve.

[0029] S2, Solid-liquid separation:

[0030] The liquid in the separation box enters the water receiving hood through the U-shaped tube, and the liquid in the water receiving hood flows into the separation screen cylinder. The heating coil heats one side of the separation screen cylinder, and the heating temperature is controlled at 50-60℃ to achieve preliminary separation of oil and water. Since there are spiral blades in the separation screen cylinder, the motor drives the gear and cam to rotate through the connecting shaft. The gear drives the separation screen cylinder to rotate through the gear ring, so that the separation screen cylinder and the spiral blades rotate synchronously. After the liquid is transported to the left to the position of the liquid filter hole, some of the impurities mixed in the liquid are separated. The liquid falls into the liquid storage box, while the impurities continue to be transported to the left as the spiral blades continue to rotate, so that the impurities fall into the impurity box through the sand and gravel filter hole.

[0031] S3. Clearing blockages:

[0032] During the counterclockwise rotation of the cam driven by the connecting shaft, the rotating roller on the fixed rod rolls outside the cam. As the cam rotates, it lifts the unblocking component through the rotating roller. When the highest point of the cam leaves the rotating roller, the support of the spring in the unblocking component causes the bracket to drive the two rollers to descend rapidly and strike the separation screen cylinder. This process is repeated. As the cam continues to rotate, the rollers can intermittently and continuously strike the separation screen cylinder, shaking off impurities from the liquid filter holes and sand filter holes on the separation screen cylinder, effectively achieving the purpose of unblocking.

[0033] S4. Defoaming treatment:

[0034] After the separated liquid falls, it comes into contact with the arc-shaped plate and the defoaming baffle. After the liquid comes into contact with the defoaming baffle with the inclined end face, the air bubbles in the liquid are eliminated. Then the liquid flows out from the leakage holes on both sides of the arc-shaped plate.

[0035] S5, Oil-water separation:

[0036] After defoaming, the liquid first falls into the storage box, while some oil and water enter the heating cylinder through the water inlet. When the oil and water exceed the water inlet, the oil is on the upper layer and the water is on the lower layer because the density of water is greater than that of oil. This makes the liquid stored in the heating cylinder water, thus achieving the purpose of oil-water separation.

[0037] S6. Gas collection:

[0038] During the process of separating the liquid in the treatment tank, the generated natural gas enters the gas tank, and then the gas tank discharges and collects the natural gas through the natural gas discharge valve pipe;

[0039] S7. Oil collection:

[0040] As the oil in the treatment tank rises, the float causes the telescopic tube to slide within the oil guide valve tube. The input end of the telescopic tube is submerged above the top oil layer. Once the oil guide valve tube is opened, the oil can be extracted. When the oil in the treatment tank falls, the telescopic tube retracts back into the oil guide valve tube due to the action of the float until the oil extraction is completed.

[0041] S8. Nutrient solution addition:

[0042] During drainage, the heating ring inside the heating cylinder is controlled to maintain the water temperature at 45-50℃. The water guide valve is opened to allow water to flow into the injection box. At the same time, the prepared nutrient solution is added into the injection box through the dosing valve. As the water continues to flow, the nutrient solution and water are fully mixed and discharged from the circulation outlet pipe, allowing the treated water to be injected into the underground oil reservoir for oil displacement.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] (1) In this invention, the pretreated product liquid is poured into a separating screen cylinder. Since the separating screen cylinder is equipped with spiral blades, after the liquid is transported to the left to the position of the liquid filter hole, some of the impurities mixed in the liquid are separated. The liquid falls into the storage box, while the impurities continue to be transported to the left as the spiral blades continue to rotate, so that the impurities fall into the impurity box through the sand filter hole. During the counterclockwise rotation of the cam driven by the connecting shaft, the rotating roller on the fixed rod rolls outside the cam. As the cam rotates, it pushes the unblocking component up through the rotating roller. When the cam reaches its highest point... After disengaging from the rotating roller, the support of the spring in the unblocking assembly causes the bracket to drive the two rollers to descend rapidly and strike the separation screen cylinder. This process is repeated. As the cam continues to rotate, the rollers can intermittently and continuously strike the separation screen cylinder, shaking off impurities from the liquid filter holes and sand filter holes on the separation screen cylinder. This eliminates the need for sedimentation separation and adsorption sand separation methods, preventing blockages in pipelines and waste of resources, and improving the unblocking effect. At the same time, it can separate oil and impurities during the oil-liquid separation process, which is beneficial for multi-stage separation of the produced liquid.

[0045] (2) In this invention, by letting the liquid fall into the storage box, some oil and water enter the heating cylinder through the water inlet. When the oil and water are submerged in the water inlet, the oil is on the upper layer and the water is on the lower layer because the density of water is greater than that of oil. This makes the liquid stored in the heating cylinder water, thus achieving oil-water separation. In the process of oil collection, the float causes the telescopic tube to slide in the oil guide valve tube. The input end of the telescopic tube is submerged in the uppermost oil layer. After opening the oil guide valve tube, the oil can be extracted. When the oil in the processing tank drops, the telescopic tube retracts into the oil guide valve tube through the action of the float until the oil extraction is completed. The oil and water collection work can be completed according to the position of the float, thereby greatly reducing the burden of oil and water collection work.

[0046] (3) In this invention, the heating ring inside the heating cylinder is controlled to work during drainage to keep the water temperature constant. The water guide valve is opened to allow water to flow into the injection box. At the same time, the prepared nutrient solution is added into the injection box through the dosing valve. As the water continues to flow, the nutrient solution and the flowing water are fully mixed and discharged from the circulation outlet pipe, thereby improving the uniformity of the distribution of bacteria in the water and enhancing the oil displacement effect. Attached Figure Description

[0047] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0048] Figure 2 This is a schematic diagram of the cross-section of the present invention;

[0049] Figure 3 This is a schematic diagram of the separation component and the separation sieve cylinder of the present invention;

[0050] Figure 4This is a schematic diagram of the unblocking component of the present invention;

[0051] Figure 5 This is a schematic diagram of the cross-section of the separating screen cylinder of the present invention;

[0052] Figure 6 This is a schematic diagram of the cross-section of the processing box of the present invention;

[0053] Figure 7 This is a schematic diagram of the structure of the defoaming component of the present invention;

[0054] In the diagram: 1. Processing tank; 2. Product liquid injection pipe; 3. Separation assembly; 301. Separation box; 302. Fixed shaft; 303. Screwdriver assembly; 304. Separation plate; 4. Support leg; 5. U-tube; 6. Water receiving cover; 7. Separation screen cylinder; 8. Bushing; 9. Spiral blade; 10. Gear ring; 11. Gear; 12. Connecting shaft; 13. Cam; 14. Unblocking assembly; 141. Telescopic rod; 142. Spring; 143. Bracket; 144. Roller; 15. Fixed rod; 16. Rotating roller; 17. Drive assembly; 171. Fixed seat; 172. Motor; 173. Drive wheel; 18. Driven wheel; 19. Slag discharge valve; 20. Heating coil; 21. Liquid 21. Filter hole; 22. Sand and gravel filter hole; 23. Liquid storage box; 24. Impurity storage assembly; 241. Impurity box; 242. Impurity discharge valve pipe; 25. Defoaming assembly; 251. Arc plate; 252. Leakage hole; 253. Defoaming baffle; 26. Heating cylinder; 27. Heating ring; 28. Water inlet; 29. ​​Water guide valve pipe; 30. Dosing assembly; 3001. Circulation outlet pipe; 3002. Injection box; 3003. Dosing valve pipe; 31. Oil guide assembly; 311. Oil guide valve pipe; 312. Telescopic pipe; 313. Float; 32. Exhaust assembly; 321. Gas tank; 322. Natural gas discharge valve pipe; 33. Medium inlet pipe; 34. Medium outlet pipe; 35. Cavity. Detailed Implementation

[0055] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0056] like Figure 1-7 As shown, the present invention provides a technical solution: a microbial oil-enhancing product recycling device, including a treatment tank 1 and a separation component 3. The top of the treatment tank 1 is fixed to the separation component 3 by two support legs 4. One side of the top of the separation component 3 is provided with a product injection pipe 2. One side of the separation component 3 is connected to a water receiving cover 6 by a U-shaped pipe 5. The water receiving cover 6 is connected to one side of the treatment tank 1.

[0057] The processing box 1 is equipped with a separation screen cylinder 7. The separation screen cylinder 7 is connected to the two sides inside the processing box 1 by two bushings 8. The separation screen cylinder 7 is equipped with a spiral blade 9. The separation screen cylinder 7 is equipped with a heating coil 20. The bottom of the heating coil 20 is fixed to the bottom inside the processing box 1. The separation screen cylinder 7 is equipped with several liquid filter holes 21 and sand filter holes 22.

[0058] By setting the spiral blades 9, the spiral blades 9 can transport the liquid and the impurities contained therein to the left during the rotation process, and cooperate with the separation screen cylinder 7 to rotate synchronously and screen the liquid, thereby facilitating the subsequent solid-liquid separation work.

[0059] By providing liquid filter holes 21 and sand filter holes 22, some impurities mixed in with the liquid can be separated. The liquid falls into the liquid storage box 23, while the impurities continue to be transported to the left as the spiral blades 9 continue to rotate, so that the impurities fall into the impurity box 241 through the sand filter holes 22. The liquid and sand are graded to facilitate subsequent recycling.

[0060] Two gear rings 10 are clamped to the outside of the separating screen cylinder 7. Two gears 11 mesh on the gear rings 10. The two gears 11 are clamped on the same connecting shaft 12. The connecting shaft 12 is set inside the processing box 1. Four cams 13 are provided on the outside of the connecting shaft 12. The cams 13 overlap with the rotating rollers 16. All four rotating rollers 16 are set on the fixed rod 15.

[0061] By setting the rotating roller 16, the friction between it and the cam 13 is reduced when they come into contact, which enables the support 143 to be driven to reciprocate more stably.

[0062] Five unblocking components 14 are snapped onto the outside of the fixed rod 15. The top of the unblocking component 14 is fixed to the top of the inside of the processing box 1. The unblocking component 14 includes a telescopic rod 141. The top of the telescopic rod 141 is fixedly connected to the top of the inside of the processing box 1. A spring 142 is sleeved on the telescopic rod 141. The bottom of the telescopic rod 141 is fixed to the bracket 143. The bracket 143 is snapped onto the outside of the fixed rod 15. Two rollers 144 are provided at the bottom of the bracket 143. Both rollers 144 overlap with the separating screen cylinder 7.

[0063] Through the cooperation between spring 142, bracket 143 and roller 144, after the highest point of cam 13 disengages from rotating roller 16, the support of spring 142 in unblocking assembly 14 causes bracket 143 to drive two rollers 144 to descend rapidly and strike the separation screen cylinder 7. This process is repeated. As cam 13 continues to rotate, rollers 144 can intermittently and continuously strike the separation screen cylinder 7, thereby improving the unblocking effect on the separation screen cylinder 7.

[0064] The bottom of the processing tank 1 is provided with a liquid storage box 23 and a miscellaneous component 24. The top of the processing tank 1 is provided with an exhaust component 32. The miscellaneous component 24 includes a miscellaneous box 241, which is snapped into the bottom of the processing tank 1. A miscellaneous discharge valve pipe 242 is provided below the outside of the miscellaneous box 241. The exhaust component 32 includes a gas manifold 321, which is snapped into the top of the processing tank 1. A natural gas discharge valve pipe 322 is provided on the top of the gas manifold 321.

[0065] Specifically, such as Figure 3 As shown, the separation component 3 includes a separation box 301, a fixed shaft 302 is provided inside the separation box 301, a screw conveyor assembly 303 is provided outside the fixed shaft 302, a separation plate 304 is provided at the bottom inside the separation box 301, the separation plate 304 is used to separate large pieces of sand and gravel from the liquid in the output liquid, and a slag discharge valve 19 is provided on one side of the separation box 301.

[0066] Through the cooperation between the auger cutter assembly 303 and the separation plate 304, the auger cutter assembly 303 can break up blocky sand and gravel while driving the produced liquid to the right. The liquid is then stored at the bottom of the separation box 301 through the separation plate 304, and the separated sand and gravel continue to be transported to the right. This makes full use of the extracted produced liquid and the sand and gravel resources it contains, and reduces the workload of subsequent separation work.

[0067] A drive assembly 17 is provided on one side of the water receiving cover 6. The drive assembly 17 is connected to the driven wheel 18 via a transmission belt. The driven wheel 18 is fixedly connected to one end of the fixed shaft 302. The drive assembly 17 includes a fixed seat 171. One side of the fixed seat 171 is fixed to the water receiving cover 6. A motor 172 is clamped inside the fixed seat 171. A drive wheel 173 is fixedly connected to the output shaft of the motor 172.

[0068] By synchronously linking the drive pulley 173 and the driven pulley 18 with the transmission belt, the auger cutter group 303 and the separating screen cylinder 7 can work synchronously, improving working stability while reducing processing costs.

[0069] Specifically, such as Figure 2 and Figure 7 As shown, a defoaming component 25 is provided inside the liquid storage box 23, and a heating cylinder 26 is provided below the defoaming component 25. The bottom of the heating cylinder 26 is fixed to the bottom of the liquid storage box 23. The defoaming component 25 includes an arc plate 251, which is set inside the liquid storage box 23. Both sides of the arc plate 251 are provided with leakage holes 252. Several defoaming baffles 253 are provided outside the arc plate 251. Both sides of the defoaming baffles 253 are designed with bevels.

[0070] With the defoaming baffle 253 in place, the separated liquid comes into contact with the arc plate 251 and the defoaming baffle 253 after falling. After the liquid comes into contact with the defoaming baffle 253 with its inclined end face, the air bubbles in the liquid are eliminated, effectively discharging the gas in the liquid, which is conducive to the efficient collection of natural gas.

[0071] Heating ring 27 is provided inside heating cylinder 26. Several water inlet holes 28 are provided at the bottom outside heating cylinder 26. Water guide valve pipe 29 is connected to the bottom of heating cylinder 26. One end of water guide valve pipe 29 is connected to dosing assembly 30. Dosing assembly 30 includes injection box 3002. A circulation outlet pipe 3001 is provided at the end of injection box 3002 away from water guide valve pipe 29. Dosing valve pipe 3003 is provided at the top of injection box 3002.

[0072] By setting up the injection box 3002, the prepared nutrient solution is added into the injection box 3002 through the dosing valve pipe 3003. As the water continues to flow, the nutrient solution is fully mixed with the flowing water and discharged from the circulation outlet pipe 3001, which improves the uniformity of the distribution of bacteria in the water and thus enhances the oil displacement effect.

[0073] The bottom of the liquid storage box 23 is provided with an oil guiding assembly 31, which includes an oil guiding valve pipe 311. The oil guiding valve pipe 311 is snapped into the bottom of the liquid storage box 23. A telescopic pipe 312 is sleeved inside the oil guiding valve pipe 311. A float ball 313 is provided at the top of the telescopic pipe 312.

[0074] Through the cooperation between the float 313 and the telescopic tube 312, the telescopic tube 312 can freely extend and retract within the oil guide valve tube 311, and can complete the oil and water collection work according to the position of the float 313, thereby greatly reducing the burden of oil and water collection work.

[0075] The processing box 1 has a cavity 35 inside, which is connected to the medium inlet pipe 33 and the medium outlet pipe 34. The medium inlet pipe 33 and the medium outlet pipe 34 are respectively located at the top and bottom of the processing box 1.

[0076] The cavity 35 effectively serves as a heat insulation element. Combined with the medium inlet pipe 33 and the medium outlet pipe 34, it allows for the injection of heat-conducting medium into the cavity 35, thereby improving the temperature uniformity and heat transfer rate of various parts within the processing chamber 1.

[0077] A method for using a microbial enhanced oil recovery product recycling device includes the following steps:

[0078] S1. Pretreatment of the produced liquid: When the produced liquid is circulated, it enters the separation box 301 through the produced liquid injection pipe 2. At this time, the motor 172 drives the drive wheel 173 to rotate. The drive wheel 173 drives the driven wheel 18, the fixed shaft 302 and the auger cutter group 303 to rotate through the transmission belt. Since the produced liquid contains some blocky sand and gravel, the auger cutter group 303 can break up the blocky sand and gravel when driving the produced liquid to the right. The liquid is accumulated at the bottom of the separation box 301 through the separation plate 304. The separated sand and gravel continue to be transported to the right and discharged from the slag discharge valve 19.

[0079] S2, Solid-Liquid Separation: The liquid in the separation box 301 enters the water receiving hood 6 through the U-shaped tube 5, and the liquid in the water receiving hood 6 flows into the separation screen cylinder 7. The heating coil 20 is controlled to heat one side of the separation screen cylinder 7, and the heating temperature is controlled at 50-60℃ to achieve preliminary separation of oil and water. Since the separation screen cylinder 7 is equipped with a spiral blade 9, the motor 172 drives the gear 11 and cam 13 to rotate through the connecting shaft 12. The gear 11 drives the separation screen cylinder 7 to rotate through the gear ring 10, so that the separation screen cylinder 7 and the spiral blade 9 rotate synchronously. After the liquid is transported to the left to the position of the liquid filter hole 21, some of the impurities mixed in the liquid are separated. The liquid falls into the liquid storage box 23, and the impurities continue to be transported to the left as the spiral blade 9 continues to rotate, so that the impurities fall into the impurity box 241 through the sand and gravel filter hole 22.

[0080] S3. Unblocking process: During the counterclockwise rotation of the cam 13 driven by the connecting shaft 12, the rotating roller 16 on the fixed rod 15 rolls outside the cam 13. As the cam 13 rotates, it lifts the unblocking component 14 through the rotating roller 16. When the highest point of the cam 13 is separated from the rotating roller 16, the support of the spring 142 in the unblocking component 14 causes the bracket 143 to drive the two rollers 144 to descend rapidly and strike the separation screen cylinder 7. This process is repeated. As the cam 13 continues to rotate, the rollers 144 can intermittently and continuously strike the separation screen cylinder 7, shaking off the impurities in the liquid filter holes 21 and sand filter holes 22 on the separation screen cylinder 7, effectively achieving the purpose of unblocking.

[0081] S4. Defoaming treatment: After the separated liquid falls, it comes into contact with the arc plate 251 and the defoaming baffle 253. After the liquid comes into contact with the defoaming baffle 253 with the inclined end face, the air bubbles in the liquid are eliminated. Then the liquid flows out from the leakage holes 252 on both sides of the arc plate 251.

[0082] S5. Oil-water separation: The defoamed liquid first falls into the storage box 23, while some oil and water enter the heating cylinder 26 through the water inlet 28. When the oil and water exceed the water inlet 28, the oil is on the upper layer and the water is on the lower layer because the density of water is greater than that of oil. This makes the liquid stored in the heating cylinder 26 water, thus achieving the purpose of oil-water separation.

[0083] S6. Gas collection: During the separation of liquid in the treatment tank 1, the generated natural gas enters the gas chamber 321, and then the gas chamber 321 discharges and collects the natural gas through the natural gas discharge valve pipe 322.

[0084] S7. Oil collection: When the oil in the treatment tank 1 rises, the float 313 causes the telescopic tube 312 to slide within the oil guide valve tube 311. The input end of the telescopic tube 312 is submerged above the uppermost oil layer. After opening the oil guide valve tube 311, the oil can be extracted. When the oil in the treatment tank 1 falls, the telescopic tube 312 retracts into the oil guide valve tube 311 through the action of the float 313 until the oil extraction is completed.

[0085] S8. Nutrient solution injection: During drainage, control the heating ring 27 inside the heating cylinder 26 to keep the water temperature at 45-50℃. Open the water guide valve pipe 29 to let water flow into the injection box 3002. At the same time, add the prepared nutrient solution into the injection box 3002 through the dosing valve pipe 3003. As the water continues to flow, the nutrient solution and water are fully mixed and discharged from the circulation outlet pipe 3001, so that the treated water is injected into the underground oil reservoir for oil displacement.

[0086] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0087] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A microbial oil displacement produced fluid recycling device, comprising a treatment tank and a separation assembly, characterized in that: The separation assembly is located at the top of the processing chamber; The processing box is equipped with a separating screen cylinder; the separating screen cylinder is equipped with spiral blades, and a gear ring is clamped to the outside of the separating screen cylinder. A gear meshes on the gear ring, and the gear is clamped on a connecting shaft. The connecting shaft is located inside the processing box, and a cam is located outside the connecting shaft. The cam overlaps with a rotating roller, and the rotating roller is mounted on a fixed rod. One side of the separation component is connected to the water receiving cover via a U-shaped tube. The water receiving cover is connected to one side of the treatment box. A blockage clearing component is snapped onto the outside of the fixing rod. The top of the blockage clearing component is fixed to the top of the treatment box. A liquid storage box and a miscellaneous component are provided at the bottom of the treatment box. An exhaust component is provided at the top of the treatment box. The number of unblocking components is five. Each unblocking component includes a telescopic rod, the top of which is fixedly connected to the top of the processing box. A spring is fitted over the telescopic rod, and the bottom of which is fixed to a bracket. The bracket is snapped onto the outside of the fixed rod. The bottom of the bracket is provided with two rollers, both of which overlap with the separating screen cylinder. There are four cams and four rotating rollers, all of which are snapped onto the fixed rod. The outside of the separating screen cylinder is snapped onto the two sides inside the processing box through two bushings. There are two gear rings, and the two gears are snapped onto the same connecting shaft.

2. The microbial oil displacement produced fluid recycling device according to claim 1, characterized in that: The top of the processing box is fixed to the separation assembly by two legs. A product liquid injection pipe is provided on one side of the top of the separation assembly. The separation assembly includes a separation box, a fixed shaft is provided inside the separation box, and a screw conveyor assembly is provided outside the fixed shaft. A separation plate is provided at the bottom inside the separation box. The separation plate is used to separate large pieces of sand and gravel from the liquid in the product liquid. A slag discharge valve is provided on one side of the separation box.

3. The microbial oil displacement produced fluid recycling device according to claim 2, characterized in that: A drive assembly is provided on one side of the water receiving cover. The drive assembly is connected to the driven wheel via a transmission belt. The driven wheel is fixedly connected to one end of a fixed shaft.

4. The microbial oil displacement produced fluid recycling device according to claim 3, characterized in that: The drive assembly includes a fixed base, one side of which is fixed to a water-receiving cover. A motor is snapped into the fixed base, and a drive wheel is fixedly connected to the output shaft of the motor.

5. The microbial oil displacement produced fluid recycling device according to claim 4, characterized in that: The separating screen cylinder is equipped with a heating ring, the bottom of which is fixed to the bottom of the processing box. The separating screen cylinder is also equipped with several liquid filter holes and sand filter holes.

6. The microbial oil displacement produced fluid recycling device according to claim 5, characterized in that: The liquid storage box is equipped with a defoaming component, and a heating cylinder is located below the defoaming component. The bottom of the heating cylinder is fixed to the bottom of the liquid storage box.

7. The microbial enhanced oil recovery product recycling device according to claim 6, characterized in that: The defoaming component includes an arc-shaped plate, which is disposed inside the liquid storage box. Both sides of the arc-shaped plate are provided with leakage holes. Several defoaming baffles are provided outside the arc-shaped plate, and both sides of the defoaming baffles are designed with bevels.

8. The microbial oil displacement produced fluid recycling device according to claim 7, characterized in that: The heating cylinder is equipped with a heating ring inside, and several water inlet holes are opened at the bottom outside the heating cylinder. A water guide valve pipe is connected to the bottom of the heating cylinder, and one end of the water guide valve pipe is connected to a dosing assembly.

9. The microbial oil displacement produced fluid recycling device according to claim 8, characterized in that: The impurity storage component includes an impurity box, which is snapped into the bottom of the processing box, and a discharge valve pipe is provided below the outside of the impurity box.

10. The microbial oil displacement produced fluid recycling device according to claim 9, characterized in that: The dosing assembly includes an injection box, with a circulation outlet pipe at one end of the injection box away from the water guide valve pipe, and a dosing valve pipe at the top of the injection box.

11. The microbial oil displacement produced fluid recycling device according to claim 10, characterized in that: The exhaust assembly includes a gas reservoir that is snapped onto the top of the processing tank, and a natural gas discharge valve pipe is provided on the top of the gas reservoir.

12. The microbial oil displacement produced fluid recycling device according to claim 11, characterized in that: The bottom of the liquid storage box is provided with an oil guiding assembly, which includes an oil guiding valve tube. The oil guiding valve tube is snapped into the bottom of the liquid storage box, and a telescopic tube is sleeved inside the oil guiding valve tube. A float ball is provided at the top of the telescopic tube.

13. The microbial enhanced oil recovery product recycling device according to claim 12, characterized in that: The processing box has a cavity that is connected to a media inlet pipe and a media outlet pipe, which are respectively located at the top and bottom of the processing box.

14. The microbial oil displacement produced fluid recycling device according to claim 13, characterized in that, The method of using the device includes the following steps: S1. Pretreatment of the produced liquid: When the produced liquid is circulated, it enters the separation box through the produced liquid injection pipe. At this time, the motor drives the drive wheel to rotate, and the drive wheel drives the driven wheel, fixed shaft and auger cutter group to rotate through the transmission belt. Since the produced liquid contains some blocky sand and gravel, the auger cutter group can break up the blocky sand and gravel when driving the produced liquid to the right. The liquid is accumulated at the bottom of the separation box through the separation plate, and the separated sand and gravel continue to be transported to the right and discharged from the slag discharge valve. S2, Solid-liquid separation: The liquid in the separation box enters the water receiving hood through the U-shaped tube, and the liquid in the water receiving hood flows into the separation screen cylinder. The heating coil heats one side of the separation screen cylinder, and the heating temperature is controlled at 50-60℃ to achieve preliminary separation of oil and water. Since there are spiral blades in the separation screen cylinder, the motor drives the gear and cam to rotate through the connecting shaft. The gear drives the separation screen cylinder to rotate through the gear ring, so that the separation screen cylinder and the spiral blades rotate synchronously. After the liquid is transported to the left to the position of the liquid filter hole, some of the impurities mixed in the liquid are separated. The liquid falls into the liquid storage box, while the impurities continue to be transported to the left as the spiral blades continue to rotate, so that the impurities fall into the impurity box through the sand and gravel filter hole. S3. Clearing blockages: During the counterclockwise rotation of the cam driven by the connecting shaft, the rotating roller on the fixed rod rolls outside the cam. As the cam rotates, it lifts the unblocking component through the rotating roller. When the highest point of the cam leaves the rotating roller, the support of the spring in the unblocking component causes the bracket to drive the two rollers to descend rapidly and strike the separation screen cylinder. This process is repeated. As the cam continues to rotate, the rollers can intermittently and continuously strike the separation screen cylinder, shaking off impurities from the liquid filter holes and sand filter holes on the separation screen cylinder, effectively achieving the purpose of unblocking. S4. Defoaming treatment: After the separated liquid falls, it comes into contact with the arc-shaped plate and the defoaming baffle. After the liquid comes into contact with the defoaming baffle with the inclined end face, the air bubbles in the liquid are eliminated. Then the liquid flows out from the leakage holes on both sides of the arc-shaped plate. S5, Oil-water separation: After defoaming, the liquid first falls into the storage box, while some oil and water enter the heating cylinder through the water inlet. When the oil and water exceed the water inlet, the oil is on the upper layer and the water is on the lower layer because the density of water is greater than that of oil. This makes the liquid stored in the heating cylinder water, thus achieving the purpose of oil-water separation. S6, Gas Collection: During the process of separating the liquid in the treatment tank, the generated natural gas enters the gas tank, and then the gas tank discharges and collects the natural gas through the natural gas discharge valve pipe; S7. Oil collection: As the oil in the treatment tank rises, the float causes the telescopic tube to slide within the oil guide valve tube. The input end of the telescopic tube is submerged above the top oil layer. Once the oil guide valve tube is opened, the oil can be extracted. When the oil in the treatment tank falls, the telescopic tube retracts back into the oil guide valve tube due to the action of the float until the oil extraction is completed. S8. Nutrient solution addition: During drainage, the heating ring inside the heating cylinder is controlled to maintain the water temperature at 45-50℃. The water guide valve is opened to allow water to flow into the injection box. At the same time, the prepared nutrient solution is added into the injection box through the dosing valve. As the water continues to flow, the nutrient solution and water are fully mixed and discharged from the circulation outlet pipe, allowing the treated water to be injected into the underground oil reservoir for oil displacement.

Images