1899 results about "Petrochemical" patented technology

The invention belongs to the technical field of petrochemical engineering pipeline monitoring, and discloses an intelligent detection and repair system and method for petrochemical engineering pipeline leakage, and the method comprises the following modules: a data collection module which comprehensively monitors the leakage condition and environmental parameters in a pipeline by deploying a high-precision and low-power-consumption multi-parameter sensor network; the data transmission module is responsible for safely and reliably transmitting the collected data to the cloud processing center; the data processing and analyzing module is used for cleaning, processing and analyzing the collected data and extracting feature information; the leakage identification module is used for identifying and judging leakage events based on various algorithms; the leakage positioning module is used for accurately determining a leakage position; and the leakage evaluation module is used for evaluating the leakage degree, type and potential risk.

The invention discloses a petrochemical explosion-proof humanoid robot trajectory planning method, device and equipment, and the method comprises the steps: collecting petrochemical environment gas concentration data, robot joint motion parameters and target position information, carrying out the dangerous region calibration of the gas concentration data, generating a forbidden map, and determining safety nodes and joint motion ranges; constructing an initial path skeleton based on target position information and safety node distribution, identifying a local dangerous section and a major dangerous section, and generating a motion constraint condition and a poison avoidance path; generating a motion primitive library based on the motion constraint condition and the joint motion range, performing stability filtering to generate stable motion primitives, and forming an advancing scheme set; acquiring a joint load peak value to construct a dynamic envelope, and judging execution fitness to form an execution probability field; and constructing a three-dimensional decision space based on the poison avoidance path, the advancing scheme set and the execution probability field, searching an optimal convergence point to generate a final planning trajectory, and providing a safe and efficient trajectory planning scheme for the petrochemical explosion-proof humanoid robot.

The invention discloses a PDF (Portable Document Format) drawing recognition and information structured extraction method. The method comprises the following steps: generating a high-resolution bitmap through image preprocessing; positioning and classifying a text region, a table region and a symbol region in the drawing based on a target detection model of transfer learning; hough transform is combined with SIFT feature matching to identify engineering symbols, and sub-pixel positioning is realized through an RANSAC algorithm; after the oblique text is corrected through affine transformation, the content is extracted through OCR; reconstructing a table structure based on OPTICS clustering and projection analysis; constructing an RDF knowledge graph according to a coordinate association rule; and using U-Net difference to detect and position an omission area and complementing the omission area. According to the method, deep learning and image processing technologies are fused, the problems of low rotating text recognition rate, table structure loss and semantic association deficiency in a traditional method are solved, through lightweight model compression and TensorRT acceleration, the analysis accuracy is remarkably superior to that of the traditional method, and the method can be widely applied to the fields of constructional engineering, petrochemical engineering and the like and has wide application prospects. And the drawing information processing efficiency and the data integrity are improved.

The invention relates to the field of petrochemical equipment, and discloses a cobweb-shaped oil-water emulsification turbulator with turbulent flow fins, which comprises an oil-water emulsification pipe, a cobweb-shaped turbulator arranged in the oil-water emulsification pipe, and annular fins and bent fins fixed on the inner side of the pipe wall of the oil-water emulsification pipe, the annular fins and the bent fins are distributed in the axial direction of the oil-water emulsification pipe, the bent fins are arranged close to the cobweb-shaped spoiler, and a gap for fluid circulation is formed between the bent fins and the cobweb-shaped spoiler. A multi-scale composite turbulent flow field is constructed through cooperative cooperation of the annular fins, the bent fins and the cobweb-shaped spoilers, the annular fins can effectively damage a boundary layer of a pipe wall and enhance local shear force, so that oil drops leaning against the wall are separated from the pipe wall and guided to a central area of a pipeline, and the bent fins further guide fluid to deviate towards the center so as to reduce flowing dead zones. The net-shaped structure of the cobweb-shaped spoiler is used for continuously stretching, shearing and secondarily crushing oil drops, and the oil-water mixing uniformity and the emulsifying efficiency are remarkably improved under the combined action of the three parts.

The invention relates to the technical field of petrochemical equipment sealing, in particular to a flange sealing performance evaluation method based on bolt axial stress, which comprises the following steps: establishing a nonlinear stress relationship between a gasket and bolt axial force; establishing a relationship between the axial stress of the bolt and the sealing contact stress of the contact surface of the gasket under different working pressures; constructing a three-dimensional model of a real sealing surface; establishing a three-dimensional model of the sealing surface contact process; obtaining the change of a leakage gap between the contact surfaces under different contact stresses, and establishing a relation model of the leakage gap of the contact interface and the sealing contact stress; establishing a quantitative evaluation model among the sealing contact stress, the leakage clearance and the leakage rate; obtaining the contact stress under the actual working condition, and calculating whether the corresponding leakage rate meets the tightness judgment standard or not so as to judge the sealing state of the flange. The invention aims to solve the technical problem that the metal sealing performance of in-service flange connection cannot be quantitatively and online evaluated in the prior art.

The invention discloses a low-temperature polyether demulsifier for oil and gas gathering and transportation and a preparation method thereof, and relates to the technical field of petrochemical engineering, and the preparation method is characterized by comprising the following steps: compounding cardanol, pentaethylenehexamine and bisphenol F according to a specific molar ratio to obtain an initiator, and carrying out formaldehyde condensation to prepare a composite initiator; epoxypropane and ethylene oxide are grafted through staged block copolymerization to form a polyether skeleton; introducing a fluorine-containing epoxy monomer to carry out terminal fluorination modification; finally, adipic acid and epichlorohydrin are subjected to chain extension crosslinking, and the demulsifier with the molecular weight being 8000-12000 Da, the fluorine content being 5.5-6.5 wt% and the PDI being smaller than or equal to 1.3 is prepared. The low-temperature demulsifying agent has the effects of realizing efficient demulsification at low temperature, improving the demulsifying efficiency and reducing the dosage through coordination of the composite initiator, super-hydrophobic permeation of the fluorinated block and accurate regulation and control of the molecular weight, solving the problems of low-temperature failure and easiness in emulsification of a traditional demulsifying agent, and meeting the requirements of low-temperature working conditions of oil and gas gathering and transportation.

Belonging to the field of petrochemical engineering, the invention discloses a catalytic slurry oil purification device, which comprises a tank body, and a feed end and a discharge end respectively arranged at two ends of the tank body. An upper partition plate and a lower partition plate are fixedly connected to the inner wall of the tank body, a discharging opening is formed in the upper partition plate, and a feeding opening is formed in the lower partition plate; the interior of the tank body is divided into three independent cavities by the upper partition plate and the lower partition plate; according to the scheme, the filter element is sleeved with the hollow cylinder, and the rotatable first spiral flow deflector is further arranged between the inner wall of the hollow cylinder and the outer wall of the filter element; a rotatable first spiral flow deflector is further arranged between the inner wall of the hollow cylinder and the outer wall of the filter element; a shear force generated by rotation of the first spiral flow deflector can prevent a filter cake on the surface of the filter element from forming a compact thick layer; a filter cake layer can be controlled within a relatively thin thickness range, and the rising speed of the pressure difference is delayed, so that the operation duration of a single filtering period is prolonged; and the single-time continuous treatment capacity of the device is greatly improved.

The invention discloses a detection method for automatic scanning of a fillet weld phased array of a petrochemical device. The method comprises the following steps: firstly, acquiring pipeline surface information in real time based on an environment sensing sensor, and synchronously generating a real-time three-dimensional environment model containing a fillet weld and a probe pose through an SLAM (Simultaneous Localization and Mapping) technology; extracting a characteristic track of the fillet weld as a reference scanning path; on the basis of the path and the real-time pose, the motion trail of the mechanical arm is dynamically planned, and phased array acoustic beam emission parameters are synchronously calculated and adjusted through the Snell law in a back-stepping mode according to the normal vector of the surface of the pipeline; the mechanical arm is controlled to operate along the planned track and execute ultrasonic detection; and finally, fusing the ultrasonic data with the real-time pose to generate a three-dimensional detection result corresponding to the three-dimensional environment model space. The full-process automation of fillet weld detection is realized, the problems of low efficiency, easy track deviation, inaccurate sound beam regulation and control, difficult data visualization and the like of a traditional method are solved, and the detection precision, efficiency and reliability are remarkably improved.

The invention discloses a preparation method of a hydrofining catalyst for petrochemical engineering. The preparation method comprises the following steps: step a, carrier pretreatment: putting an aluminum oxide precursor into a dilute nitric acid solution with the mass fraction of 1-5%, dipping for 2-4 hours, and drying at 120-150 DEG C for 3-6 hours; the comprehensive performance of the catalyst is remarkably improved by modifying the alumina carrier with phosphoric acid and optimizing an active component loading process; a gradient acid center is constructed on the surface of the carrier through phosphoric acid treatment to promote adsorption and dissociation of the sulfur / nitrogen-containing compound; the dispersion degree of the active phase is enhanced and high-temperature sintering is inhibited by a bimetal synergistic loading strategy; the pore structure evolution is effectively controlled by a segmented drying and stepped heating roasting process, a through type mesoporous network is formed, and the macromolecular diffusion efficiency is improved; the obtained catalyst is improved in activity in diesel oil hydrodesulfurization, improved in mechanical strength and prolonged in service life.

An unmanned aerial vehicle having a petrochemical-based engine powering at least one rotational blade for achieving flight provides for improved vegetation removal. The AEV includes a power transformer connected to the engine, the transformer generating electrical power from the operation of the engine and a plurality of electrically-powered blade units, each unit having a blade powered by a motor. In the AEV, a plurality of electrical connectors provide for transferring the electrical power generated by the transformer to each of the electrical motors of the blade units for causing circular rotation of the corresponding blade such that unmanned aerial vehicle is operative to trim the vegetation using the plurality of blade units powered by the engine.

The invention relates to the technical field of coating materials, and particularly discloses a metallurgical strengthening preparation process of a wear-resistant coating of a high-stress valve ball. Comprising the following steps that S1, a porous structure supporting layer is prepared, specifically, cobalt-based alloy powder and a pore forming agent are mixed according to the mass ratio of (85-92): (8-15), and a porous middle layer is formed on the surface of a sphere base body through sintering; s2, coating slurry is injected; s3, sintering is carried out; s4, carrying out laser micro-texture treatment; s5, embedding a solid lubricant; s6, performing hot isostatic pressing densification; and S7, vibration auxiliary polishing is conducted. The metallurgical strengthening preparation process for the wear-resistant coating of the high-stress valve ball can be used for surface strengthening treatment of high-parameter valve core ball parts in the fields of petrochemical engineering, electrical energy, aerospace and the like, and has the advantages of high bonding strength between the coating and a matrix, excellent high-temperature wear resistance and thermal shock resistance, stable friction coefficient, long service life, high wear resistance and the like. And the method has the advantages of high process adaptability and low bonding failure risk.

The invention relates to the technical field of petrochemical instrument measurement, in particular to a non-contact tension ring size measuring device and method, and the device comprises a camera obscura, a light source, a slit, a sliding rail with scales, a vertical horizontal hanging rod, an adjustable hanging line, a horizontal movable tension ring clamp and a movable coordinate paper clamp, a projection of the tension ring is formed on the coordinate paper. The actual diameter of the tension ring is obtained through the similar triangle relation; and evaluating the roundness through the multi-axial projection diameter difference. The device is simple in structure, low in cost and accurate in measurement, and can replace an expensive imager to be used for non-contact measurement of the outer diameter of the platinum ring.

The invention provides a composite surfactant for oil displacement of a hypersalinity oil reservoir and a preparation method of the composite surfactant, and relates to the technical field of petrochemical engineering. The composite surfactant is prepared from the following components in percentage by weight: 0.1 to 0.3 percent of anionic-nonionic surfactant, 0.01 to 0.03 percent of cationic surfactant and the balance of formation water, wherein the anionic-nonionic surfactant is prepared by the following steps: reacting a hydroxyl-containing compound with ethylene oxide to obtain polyoxyethylene ether, then carrying out esterification modification by using aconitic acid modified rosin, then sulfonating by using a sulfonating agent, and finally neutralizing. The composite surfactant shows relatively low interfacial tension under the condition of hypersalinity (50000-200000 mg / L), is high in stability, and can be used for improving the recovery efficiency of hypersalinity oil reservoirs.

The present invention belongs to the technical field of petrochemical catalysis, and relates to a preparation method for improving the stability of a Cu-Beta zeolite catalyst for preparing caprolactam from caprolactone, and the use thereof. In the present invention, a cavity-modified dealuminated Beta zeolite is used as a carrier, and copper is loaded in pore channels of the zeolite carrier by means of an improved ammonia distillation method. The cavity modification refers to subjecting the dealuminated Beta zeolite carrier to a desiliconization technique controlled by the use of a weak organic base so as to enlarge silanol nests generated by dealumination of the dealuminated Beta zeolite carrier, thereby better accommodating and stabilizing the nano and sub-nano copper particles. The core of the improved ammonia distillation method involves impregnating a zeolite carrier with an equal volume of a copper-ammonia complex solution, such that the copper-ammonia complex mainly undergoes, during ammonia distillation, a reaction of depositing copper hydroxide in zeolite pore channels, thereby improving the sintering resistance. The Cu-Beta catalyst prepared using the method provided by the present invention exhibits high activity, selectivity and stability when applied to the reaction of caprolactam prepared from caprolactone via gas-solid phase hydroamination.

The invention discloses an application of rhodococcus diploides in treatment of waste water containing isophorone, the rhodococcus diploides is classified and named as Rhodococcus tectodiphilus, the strain number is GXGD-YZ-2510, and the preservation number is GDMCC No: 67304. The invention further discloses a preparation method of the rhodococcus diploides. The strain shows good growth metabolism activity and isophorone degradation efficiency in a high-salt aerobic environment. Under the conditions that the system salinity is 1 wt%, the initial isophorone concentration is 200 mg / L, and the dissolved oxygen is 3-5 mg / L, the removal rate of the strain on the isophorone reaches 78.6%. The strain not only has excellent salt stress resistance, but also can realize efficient bioconversion of isophorone under high-salt aerobic conditions, and effectively solves the technical bottleneck that isophorone in high-salt wastewater in the industries of petrochemical engineering, chemical engineering, pharmacy and the like is difficult to biochemically treat; the method has the remarkable advantages of being thorough in degradation, low in cost, environmentally friendly, high in process adaptability and the like, and a novel strain resource and an industrialization technical scheme are provided for biological treatment of high-salinity wastewater of refractory organic pollutants.

The invention relates to the technical field of advanced petrochemical and chemical new materials, in particular to a fireproof flame-retardant glass fiber reinforced plastic pipeline material and a preparation method thereof.The fireproof flame-retardant glass fiber reinforced plastic pipeline material is prepared from phenolic resin, alpha-olefin ethylene copolymer, modified nano aluminum hydroxide, glass fiber, a phosphorus-nitrogen flame-retardant synergist, a silane coupling agent, a curing agent and an antioxidant; according to the invention, the formula of the fireproof flame-retardant glass fiber reinforced plastic pipeline material is designed, various fillers are subjected to multi-step modification treatment, and preparation process parameters are optimized, so that the synergistic effect of various components and various process steps is realized, and the material performance is greatly improved from microscopic interface bonding to macroscopic material performance; the technical problems that in the prior art, flame retardance and mechanical performance are difficult to consider, aging resistance is poor, and a formed structure has defects are effectively solved.

The invention provides a preparation method of chlorinated paraffin 70 with a high softening point, and belongs to the technical field of chlorinated paraffins.The preparation method comprises the steps that S1, mixed wax is provided, and raw materials of the mixed wax are Fischer-Tropsch wax and petrochemical wax; s2, feeding the mixed wax into a reactor, then turning on an ultraviolet lamp in the reactor for irradiation, after liquid chlorine is gasified to form chlorine, feeding chlorine into the reactor, heating and carrying out segmented control reaction; s3, after the reaction is finished, blowing air into the reactor, then washing a reaction product with water, and then adding a compound stabilizer into a crude product obtained by washing with water, so as to obtain chlorinated paraffin 70; the chlorine content of the chlorinated paraffin 70 is not less than 69.5%, the softening point is not less than 98 DEG C, and the acid value is not more than 0.1 mgKOH / g. According to the method, hot chlorination and photo-initiation are combined, so that the chlorine content and the softening point of the product are controllable, the production efficiency is high, the reaction speed is high, the reaction temperature is reduced, the production period is shortened, and the product quality is stable.

The invention relates to the technical field of thermal insulation materials, and discloses a thermal insulation material with fireproof and thermal insulation characteristics and a manufacturing method thereof, and the thermal insulation material is prepared by building a multi-layer gradient phase change thermal storage structure, forming a biomineralization inorganic skeleton, arranging a high-temperature activation self-repairing system and performing composite reinforcement on plant fibers and attapulgite. The fireproof time of the material is remarkably prolonged through a multi-protection mechanism, the self-repairing capability after a fire disaster is achieved, and the technical problems that a traditional fireproof heat-insulating material is insufficient in fire resistance, structural damage cannot be repaired, and a phase-change material is prone to loss are effectively solved; the material is especially suitable for high-fire-risk environments such as industrial plant firewalls, tunnel inner wall fireproof heat insulation layers and petrochemical equipment protection layers.

The invention belongs to the technical field of petrochemical engineering, and relates to a continuous coking production system and process method for hydrogenated unconverted oil, and the production system comprises a membrane filter, a raw material tank, a homogenizer, a tubular furnace, a coking machine, an oil cooler and a stock bin. According to the invention, the continuous production of the high-quality petroleum coke is realized by combining a synergistic process method of membrane filtration, modification, homogeneous emulsification and tubular furnace coking machine coupling with a graphite adding and hydraulic conveying technology without a noble metal catalyst. The sulfur content, the ash content and the volatile components of the petroleum coke prepared by the technological method all meet the industrial standards, the requirement of pre-culture low-emission anode coke of electrolytic aluminum can be met, and the cost is low.

This invention discloses a heavy-duty anti-corrosion and anti-scaling epoxy powder coating, its preparation method, and its application, belonging to the field of coating technology. According to the weight composition, the epoxy powder coating comprises the following components: 45-60 parts epoxy resin, 8-15 parts curing agent, 5-25 parts filler, 5-10 parts synthetic filler, 1-10 parts pigment, 0.25-5 parts defoamer, 0.25-5 parts leveling agent, 0.25-5 parts antioxidant, and 0.25-5 parts curing accelerator, with the sum of all components being 100%. This coating exhibits low porosity (level 1 to 2) and low scaling rate (0.687-0.728 × 10⁻⁶). ‑3 (mg / cm 3 This coating exhibits superior properties, including high adhesion (≥50 MPa, significantly exceeding the ≥20 MPa bond strength specified in standard SY / T0442-2018), low cathodic disbondment (only 2.3-2.5 mm at 65℃, 1.5V, and 48h), excellent abrasion resistance (20-24 mg per kg / 1000r on a CS-17 wheel), and the ability to pass an impact test at -30℃ and 5J. It is suitable for complex and harsh industrial environments such as petrochemicals, marine engineering, heat transfer, and water treatment, providing a reliable protective solution for equipment and pipelines.

The invention discloses an intelligent state monitoring method and system based on petrochemical equipment, and relates to the technical field of intelligent state monitoring, and the method comprises the steps: constructing a petrochemical equipment digital twin based on the parameters and physical characteristics of target petrochemical equipment, and collecting multi-source time sequence data; inputting the multi-source time sequence data into the digital twin of the petrochemical equipment, and performing real-time simulation to obtain theoretical operation state data; and based on the multi-source time sequence data and the theoretical operation state data, obtaining deviation data between the measured value and the theoretical value, and updating the parameters of the digital twin of the petrochemical equipment by using the deviation data to obtain equivalent real operation state data. Through deep fusion of a mechanism model, data driving and an intelligent algorithm, accurate prediction of equipment life, effective distinguishing of fault types and automatic generation of a diagnosis report are realized, and the industrial problems of high false alarm rate, poor interpretability and lack of predictability in the prior art are fundamentally solved.

The invention relates to the technical field of petrochemical engineering, in particular to a continuous production method of high-stability N-methyldiisopropanolamine. The method comprises the following steps: heating and reacting methylisopropanolamine and propylene oxide under the action of a specific catalyst to generate an N-methyldiisopropanolamine crude product; then adding the crude product into a rectifying tower, and extracting a high-purity N-methyldiisopropanolamine product from a side line at the middle upper part; the used catalyst is citric acid modified zeolite loaded copper-chromium bimetal. According to the production method disclosed by the invention, by optimizing an active site structure and a rectification separation path of the catalyst, efficient and stable operation of a reaction process is realized, and the thermal stability of a final product is remarkably improved.

The utility model relates to the technical field of petrochemical pipeline detection, in particular to a petrochemical pipeline damage defect detection device which comprises a base, a limiting plate is fixed at the top of the base, two sliding seats are symmetrically arranged on the limiting plate in a sliding mode, rotating discs are rotatably connected in the two sliding seats, the rotating discs are arranged in a hollow mode, and the rotating discs are arranged in the base. A petrochemical pipeline body is clamped in the middle of the rotary disc, a mounting frame is fixed to the top of the base, a notch is formed in the middle of the mounting frame, a sliding column is slidably connected into the notch, and a scanning detection probe is mounted at the bottom of the sliding column. The motor drives the transmission shaft to drive the reciprocating screw rod to rotate, so that the sliding block drives the sliding column to slide, and the scanning detection probe at the bottom of the sliding column slides back and forth to scan and detect, so that the detection efficiency is improved, the petrochemical pipeline can be clamped and fixed during detection, and the fixed petrochemical pipeline can be driven to turn over for detection after being clamped. The detection is comprehensive and the detection quality is improved.

The invention relates to the technical field of image recognition, in particular to a petrochemical pipeline leakage recognition method based on an unmanned aerial vehicle inspection image, which comprises the following steps: generating a pixel-level surface normal vector field according to an unmanned aerial vehicle inspection image sequence, and calculating an angle variation between adjacent vectors in the pixel-level surface normal vector field, and generating a surface normal vector gradient map in combination with luminosity change information of the multiple frames of images. According to the method, the analysis range is focused in the determined geometric deformation candidate area, the unique gloss and color change characteristics of liquid leakage are captured, and finally, the wet abnormal coordinate set and the geometric deformation area are subjected to space alignment and overlapping judgment, so that the high credibility of an identification result is ensured, and the identification accuracy is improved. False report and missing report caused by interference of environmental factors such as illumination change and surface stains of a single feature source are avoided.

The invention belongs to the field of petrochemical engineering, and discloses a bimetallic Ni-Pt / RFE hydroisomerization catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving a nickel precursor in water, stirring until clarification, and dropwise adding ammonia water to obtain a mixed solution 1; rFE is added into the mixed solution 1, the pH value is adjusted to be 9-11.5, suction filtration, washing and drying are conducted after stirring, and Ni / RFE is obtained; dissolving a platinum precursor in water, stirring until the solution is clear, and dropwise adding ammonia water to obtain a mixed solution 2; and adding the Ni / RFE into the mixed solution 2, adjusting the pH value to 9-11.5, stirring, and carrying out suction filtration, washing, drying and roasting to obtain the Ni-Pt / RFE. The method is simple and convenient to operate and mild in condition, the catalyst activity and the isomerization efficiency are remarkably improved through the synergistic effect of Ni and Pt, the catalyst preparation cost is greatly reduced while the use amount of precious metal is reduced, efficient conversion of long straight-chain alkane can be achieved, and the isomerization conversion rate of n-dodecane within 60 minutes can reach nearly 90%.

The invention belongs to the technical field of equipment special for petrochemical engineering, and particularly relates to the technical field of oil-gas mixture conveying, in particular to an intelligent multiphase booster pump device which is used for pumping a gaseous medium, a liquid medium or a gas-liquid mixed medium. The booster pump comprises a support, a pump driving device and a pump cylinder component. And the booster pump pre-mixes the pumping medium on the basis of adjusting the power of the motor and / or the acting area difference of the two sides of the inner cavity, so that the pumping medium is not subjected to phase splitting within the preset lift. Piston driving is innovatively adopted to achieve oil-gas mixed transportation, compared with an existing mixed transportation pump, the gas carrying amount is larger, the asymmetric piston pumping mode is adopted, and based on the pressure difference of a left cavity and a right cavity in a cylinder, compression and premixing of pumping media are quite efficiently achieved; under the condition that oil-gas separation equipment and heating equipment are not used, the fact that the piston pump with ultrahigh pumping efficiency is used for conveying the oil-gas mixture is achieved, and the pumping efficiency of the oil-gas mixture is greatly improved.

The invention relates to a multi-model-based petrochemical production stream molecular-level composition prediction method and system, and relates to the technical field of oil refining chemical molecule management, and the method comprises the steps: measuring the molecular composition of a raw material, splicing structural units based on a structural unit-bond electric matrix frame, and constructing a molecular digital structure topology; constructing a molecular composition model by combining a preset molecular database, a probability density function and a molecular property predictor; establishing a molecular-level reaction network based on a catalytic reforming reaction mechanism, and constructing a molecular-level reaction kinetic model in combination with a reaction rate expression; constructing a reactor model according to mass, energy and momentum transfer equations; inactivation and separation unit models are constructed, multiple models are coupled in sequence, a whole-process reaction-separation molecular level prediction model is generated, and any stream molecular level composition is predicted. The method solves the problem that traditional petrochemical production depends on measurement results to adjust process parameters and has operation lag, and can eliminate lag and improve production control precision by predicting stream molecular composition.

The invention relates to the technical field of petrochemical engineering, in particular to a petrochemical engineering oil-water separation device which comprises a separation box, a pretreatment unit, a mixing unit, an aeration flotation unit and a recovery unit are sequentially arranged in the separation box in the water flow direction, and partition plates are arranged among the mixing unit, the aeration flotation unit and the recovery unit. The device has the beneficial effects that force is transmitted to a supporting rod through a push rod and a wedge block during movement of a reciprocating assembly, so that a first connecting shaft and a second rack are pressed to be meshed with an outer gear ring of a one-way wheel, the one-way wheel is driven to rotate, a shifting plate fixed on the one-way wheel swings directionally, a liquid level scum layer is effectively disturbed, and the liquid level scum layer is effectively disturbed. And the scum is guided to orderly flow towards one side of the recovery unit, so that subsequent centralized collection is facilitated. And on the other hand, the reciprocating motion of the sliding block realizes the micro-amplitude rotation of the aeration pipe through the extension plate and the first gear, so that the self-cleaning anti-blocking function is realized, and the integration in the manufacturing of the sewage treatment equipment is improved.