179 results about "Coalescer" patented technology

The invention provides a coalescence-selective filtration-deep bed filtration efficient oil-water separation system which comprises a coalescence system, a selective filtration system and a deep bed filtration system, oily wastewater enters a coalescer, and tiny oil droplets are coalesced into larger oil droplets through wetting coalescence and collision coalescence; the coalesced wastewater enters a selective filter, oil droplets and water respectively flow out through an oil channel and a water channel, and primary separation is realized; according to the present invention, the water after the primary separation enters the deep bed filter to achieve the deep separation, the efficient oil-water separation and the water quality standard discharge or reuse are achieved through the combination process of coalescence, selective filtration and deep bed filtration, and the system has advantages of high treatment efficiency, low energy consumption, less carbon emission, oil and water recycling, or water standard discharge.

The invention discloses a C4 dehydration device, and relates to the technical field of chemical raw material treatment. The coalescer comprises a coalescer main body, a dehydration device is arranged in the coalescer main body, the dehydration device comprises a fixed cylinder, the fixed cylinder is fixed to the rear side of the inner wall of the coalescer main body, the front side of the fixed cylinder penetrates through and is connected with a three-fork circular frame in a clamped mode, and a plurality of through hole discs are evenly fixed to the interior of the three-fork circular frame at equal intervals; and two foam filter blocks are fixed on the rear side of each of the plurality of through hole discs. Through the arrangement of the dehydration device, the travel path of C4 gas in the coalescer main body is increased by a channel formed by a semicircular plate and a through hole disc, so that the dehydration effect of the foam filter block on the C4 gas is improved; meanwhile, a rotating rod, a sleeve, an abutting rod, a trapezoidal curve rod and an inserting rod are matched to drive a semicircular plate to extrude the foam filter block, so that water adsorbed in the foam filter block is extruded out.

The utility model discloses a hydrogen peroxide working solution purification system which is characterized in that firstly, a part of moisture content in a working solution is removed through an efficient coalescer, secondly, 90% of the working solution enters a vacuum dehydrator through metering of a liquid meter and control of an automatic control valve, and the moisture content in the working solution is removed again. The rest 10% of the working solution enters the alkali washing unit and then is collected to enter the post-treatment carclazyte bed, the acidity of the working solution entering the post-treatment carclazyte bed is reduced, the service time of activated aluminum oxide can be prolonged, the moisture content in the working solution is further removed through the post-treatment carclazyte bed, and degradation products in the working solution are adsorbed and regenerated; finally, the working solution enters the filtering unit to be filtered again, residual impurities and degradation products in the working solution are removed, and the purification operation of the working solution is completed.

The invention discloses a gas-liquid separation coalescer and a regulating method and a backwashing method, and relates to the technical field of gas-liquid separators. The gas-liquid separation coalescer comprises a housing, a dust removal filter element and a coalescing filter element; a first cavity and a second cavity are arranged in the housing, and the first cavity is in an inverted cone shape; a partition plate is arranged at the junction of the first cavity and the second cavity; the dust removal filter element is arranged on the lower surface of the partition plate, and the coalescing filter element is arranged above the partition plate. A lifting plate is arranged at the bottom end of the coalescing filter element, and the lifting plate is provided with a water-permeable hole; the lifting plate can move longitudinally to realize the storage and discharge of coalescing liquid; when the coalescing liquid is discharged, the impurity particles on the dust removal filter element can be backwashed. The gas-liquid mixture forms a vortex in the first cavity to remove large-volume impurity particles, and then flows through the dust removal filter element to remove small and medium-volume impurity particles, so as to avoid impurity particles blocking the coalescing filter element. The peripheral filter element can rotate, and the relatively clean side of the peripheral filter element is directed to the outside to perform filtering operations, thereby increasing the service life of the peripheral filter element.

The invention relates to a dichloromethane separation technology, in particular to a dichloromethane separation system capable of replacing centrifugal washing based on a PC project, which comprises a dichloromethane separator, a high-efficiency coalescer and a pre-filtering assembly, the pre-filtering assembly comprises a main filtering tank, an auxiliary filtering tank, a main separation channel arranged on the main filtering tank, an auxiliary separation channel arranged on the auxiliary filtering tank and filters arranged in the main filtering tank and the auxiliary filtering tank; a channel conversion assembly and a driving assembly are installed on the pre-filtering assembly, the input end of the channel conversion assembly is connected with the output end of the driving assembly, and the channel conversion assembly is used for controlling opening or closing of the main separation channel and the auxiliary separation channel; the channel switching assembly and the driving assembly are matched to synchronously open and close the main separation channel and the auxiliary separation channel on the pre-filtering assembly, a pure mechanical transmission structure is adopted, switching use is more convenient, operation is more stable, and damage is not likely to happen.

The invention provides a segmented coalescence system based on wettability gradient. The system comprises a storage tank, a segmented coalescer and a gravity separation tank, the segmented coalescer is composed of a plurality of layers of coalescence beds, a gravity separation area is clamped between every two layers of coalescence beds, through the wettability gradient design, the interface energy synergistic effect and optimized fluid dynamic characteristics are fully utilized, the separation efficiency reaches up to 98.50%, and the separation effect is good. The mixing design of the super-hydrophilic sand and the super-hydrophobic sand obviously enhances the wetting and coalescence efficiency of oil drops, the particle size gradient design realizes segmented coalescence of the oil drops, the lower layer of small-particle-size sand is demulsified and coalesces small oil drops, the upper layer of large-particle-size sand promotes combination of large oil drops, and the continuous water film and oil film structure effectively avoids the problem of pore channel blockage. And the bed pressure drop is reduced.

A computer implemented method that enables artificial intelligence based demulsifier control for AC or modulated AC / DC electrostatic coalescers is described. The method includes monitoring parameters associated with the GOSP facility and inputting the parameters to a trained machine learning model that outputs a minimum HPPT separation efficiency. The method includes determining a target HPPT separation efficiency based on the minimum HPPT separation efficiency. Additionally, the method includes adjusting a demulsifier dosage being injected into the HPPT apparatus to separate dry oil at the target HPPT separation efficiency.

The utility model discloses an oil-water separation device integrating agglomeration and adsorption, and belongs to the field of environmental protection of oily sewage treatment. The device comprises a coalescence oil removal tank, a plurality of adsorption oil removal units, a pipeline and a valve control system. An oil discharge port is formed in the top of the coalescence oil removal tank, and a liquid inlet flow guide channel, a flow guide liquid outlet, a coarse graining coalescer, a coalescence oil removal tank liquid outlet and a coalescence oil removal tank liquid discharge pipe are arranged in the coalescence oil removal tank. The oil removal units are annularly connected in series, sequentially pass through the adsorption oil removal units from the adsorption unit liquid inlet main pipe, and are discharged after being purified and deoiled. The coalescence oil removal device and the adsorption oil removal device are integrally designed, and the efficient and deep oil removal effect can be achieved. Most oil substances are removed in the coalescence process, so that the subsequent adsorption pressure is reduced, and the treatment cost can be reduced; due to the design of the follow-up tandem type adsorption unit, the adsorption process and the regeneration process are separated, continuous oil removal treatment can be achieved, operation and maintenance are convenient, and practicability is high.

The invention relates to the technical field of distillate oil refining, and discloses a vacuum distillate oil deacidification method which comprises the following steps: S10, performing deacidification treatment on vacuum distillate oil and a deacidification agent in a deacidification unit; s20, carrying out extraction separation on the obtained deacidification agent to be generated and a back extraction agent in a back extraction mixing coalescer; s30, the separated supernatant liquid is conveyed to a back extractant regeneration device for regeneration treatment; s40, the separated lower-layer liquid enters a deacidification agent regeneration device to be subjected to regeneration treatment; the deacidification unit comprises one or more deacidification mixing coalescers, each of the deacidification mixing coalescers and the back extraction mixing coalescers comprises a shell, each shell is provided with a premixing area, a coalescence separation area and a settling separation area from top to bottom, structured packing is arranged in the premixing areas, and polar fiber bundles are arranged in the coalescence separation areas; the deacidification agent contains organic amine, a cosolvent and water. The method can be used for deacidification treatment of vacuum distillate oil with high viscosity and high acid value, and is wide in application range.

The invention relates to the technical field of chemical separation, and discloses an isomerization system and process for 1-butene in etherified C4. Comprising an isomerization reactor, a coalescer, a heat exchanger, a static mixer and a filter, an inlet of the coalescer is connected with an etherified C4 pipeline, an outlet pipeline of the coalescer penetrates through the heat exchanger to be connected with an inlet of the static mixer, the inlet of the static mixer is further connected with a hydrogen pipeline, and an outlet of the static mixer is connected with an inlet of the isomerization reactor. An isomerization reactor outlet is connected with a filter inlet, and a filter outlet pipeline enters the isobutane separation tower. According to the method, 1-butene in etherified C4 is isomerized, and after 1-butene is isomerized into 2-butene by utilizing the relatively small relative volatility of 1-butene and iso-butane and the relatively large relative volatility of 2-butene and iso-butane, the content of 1-butene in the raw material is reduced, the separation difficulty of iso-butane is reduced, and iso-butane with the same purity is obtained; the reflux ratio of the isobutane separation tower can be reduced, and the purpose of saving energy is achieved.

The invention discloses a waste sulfuric acid treatment method and device, the device comprises a sintered filter element filter, a fine filtration coalescer, an adsorption tank and a membrane separator which are connected in sequence, and the fine filtration coalescer adopts a ceramic membrane tube or a polytetrafluoroethylene membrane tube or a silicon carbide lining membrane tube as a filter material; an adsorption material in the adsorption tank is one or a combined adsorption material of more than two of activated carbon, a modified molecular sieve, a metal organic framework material and a nano adsorption material; and the membrane separation system adopts one or a combined membrane of more than two of an ultrafiltration membrane, a reverse osmosis membrane and an electrodialysis membrane. The alkylation waste acid regeneration process can be simplified, the occupied area of the device is saved, the engineering investment is reduced, and the operation cost is greatly reduced compared with that of an existing process technology; according to the method, a physical separation means is adopted, organic polymeric oil, dissolved organic matters, dissolved salts and other impurities in the alkylated waste sulfuric acid can be effectively removed without decomposing and reconstructing the waste sulfuric acid, and the concentrated sulfuric acid after concentration completely meets the production requirements of an alkylation device.

The invention is applicable to the technical field of hydrogen peroxide preparation and processing, and provides an industrial hydrogen peroxide impurity removal and purification device and method.The industrial hydrogen peroxide impurity removal and purification device comprises a platform, the front portion of the upper surface of the platform is vertically and fixedly connected with a first mounting frame, and the interior of the first mounting frame is fixedly connected with a vertically-arranged cylindrical extraction tower. According to the impurity removal and purification device and method for industrial hydrogen peroxide, the coarse hydrogen peroxide coalescer, the purification tower, the filter and the fine hydrogen peroxide coalescer are arranged, the device conducts multiple purification on a hydrogen peroxide solution through multiple structures, organic matter and other impurities in the hydrogen peroxide solution are completely removed, the content of organic carbon and particle matter impurities in a product is effectively reduced, and the product quality is improved. Generally, the content of organic carbon after treatment can reach 100 ppm or below, and the load of a purification tower is reduced on the premise that the aromatic hydrocarbon consumption of the same ton of hydrogen peroxide is not changed; according to the process device, the purification effect can be improved by 20-30%, so that the quality of a hydrogen peroxide product is further improved, the market competitiveness is obviously improved, and the economic benefit is obvious.

This invention discloses a high-efficiency integrated treatment system for produced water from oilfields, comprising an oily wastewater settling filter and an oily wastewater filter coalescer connected in sequence. The oily wastewater settling filter includes a filter tank, a settling separation mechanism, and a paper tape filter mechanism. The settling separation mechanism is located in the upper part of the filter tank, and the paper tape filter mechanism is installed on the filter tank. The oily wastewater filter coalescer includes a shell and a filter coalescing cartridge assembly. The shell includes a cartridge installation section, an inlet distribution section, and a flotation separation section. The technical solution of this invention uses the oily wastewater settling filter as a pre-treatment device and the oily wastewater filter coalescer as a post-treatment device. The organic combination of the two improves the system's effectiveness (good effluent quality indicators and stable performance) while also enhancing its economy (low construction cost and low operating cost) and environmental performance (low energy consumption and low generation of secondary oily waste).

The invention discloses a waste sulfuric acid treatment method and system. The system comprises a sintered filter element filter, a fine filtration coalescer, an adsorption tank, a gas stripping tower, an alkaline washing tower, a molecular sieve dehydration device and a gas medium heating facility, a ceramic membrane tube or a polytetrafluoroethylene membrane tube or a silicon carbide lining membrane tube is adopted as a filter material of the fine filtering coalescer; an adsorption material in the adsorption tank is one or a combined adsorption material of more than two of activated carbon, a modified molecular sieve, a metal organic framework material and a nano adsorption material. The alkylation waste acid regeneration process can be simplified, the occupied area of the device is saved, the engineering investment is reduced, and the operation cost is greatly reduced compared with that of an existing process technology; a physical separation means is adopted, organic polymeric oil, dissolved organic matter, dissolved salt and other impurities in the alkylation waste sulfuric acid can be effectively removed without decomposing and reconstructing the waste sulfuric acid, and the concentrated sulfuric acid after concentration completely meets the production requirements of an alkylation device.

Aircraft air cycle machines include a first stage turbine, a second stage turbine that receives air from the first stage turbine, and a duct arranged between the first stage turbine and the second stage turbine. A circular finned coalescer is arranged within the duct and includes a central body, a first fin layer wrapped about the central body, a first parting sheet wrapped about the first fin layer, and a second fin layer wrapped about the first parting sheet. Each of the fin layers include a plurality of fin elements and channels are defined between circumferentially adjacent fin elements of each of the first and second fin layers. The channels are tortuous channels such that moisture carried on a flow through the channels will impinge upon surfaces of the fin elements and coalesce into water droplets.

A cyclonic system and method for gas-liquid-solid separation is provided. The system may comprise a Gas-Liquid Cylindrical Cyclone (GLCC) for gas-liquid separation, a cyclone for solid particle separation, and a cyclone for droplet separation. The GLCC may have a vertical churn flow coalescer and a horizontal inlet with an internal inclined flow diverting plate to direct the flow tangentially to the GLCC. The cyclone with a horizontal tangential inlet for solid separation may be installed at the lower section of the vertical churn flow coalescer. Solid particles may be collected at the bottom and discharged. The cyclone for droplet separation may be installed at the upper section of the GLCC. Liquid may be collected in the annulus and drained to the lower section of the GLCC.

The present application discloses a support for a coalescer filter element, the support comprising a first end and a second end and a fluid flow rod having at least three fluid channels extending from the first end to the second end; and a filtration system, the filtration system comprising a coalescer filtration element disposed on the support; and a method of removing undesired contaminants and / or fluids from a gas using the filtration system.

The present invention discloses a device for dehydrating C4, and relates to the technical field of chemical raw material processing. The present invention comprises a coalescer body, wherein a dehydrating device is arranged inside the coalescer body, wherein the dehydrating device comprises a fixed cylinder, wherein the fixed cylinder is fixed to the rear side of the inner wall of the coalescer body, wherein a three-pronged round frame is penetrated and clamped on the front side of the fixed cylinder, wherein a plurality of through-hole disks are evenly and equidistantly fixed inside the three-pronged round frame, and two foam filter blocks are fixed on the rear side of the through-hole disks. Through the arrangement of the dehydrating device, the present invention enables the channel formed by the semicircular plate and the through-hole disk to increase the travel path of the C4 gas in the coalescer body, thereby improving the effect of the foam filter block on dehydrating the C4 gas; at the same time, the rotating rod, the sleeve, the abutment rod, the trapezoidal curve rod, and the insertion rod cooperate to drive the semicircular plate to squeeze the foam filter block, thereby squeezing out the water adsorbed in the foam filter block.

The utility model belongs to the technical field of natural gas screw compressors, and particularly relates to a self-circulation cooling and heat recycling device of a natural gas screw compressor. The self-circulation cooling and heat recycling device of the natural gas screw compressor comprises the natural gas screw compressor, an inlet of the natural gas screw compressor is connected with a duplex filter A, an outlet of the natural gas screw compressor is connected with a cooler, the cooler is connected with a gas-liquid separator, the lower portion of the gas-liquid separator is connected with a duplex filter B, and the duplex filter B is connected with a heat exchanger. The duplex filter B is connected with a natural gas screw compressor, and the top of the gas-liquid separator is connected with two coalescers connected in parallel. According to the self-circulation cooling and heat recycling device of the natural gas screw compressor, forced cooling is carried out in the mode that desalted water is directly injected, self-circulation in a system is achieved through pressure in the system and a cooler device, meanwhile, heat generated in the cooling process can exchange heat with the desalted water, and the heat recycling efficiency is improved. And cyclic utilization of heat is realized.

Systems and methods for removing organic compounds byproducts from a product stream from a pyrolysis reactor and associated systems and methods are disclosed herein. In some embodiments, the system includes a first condenser that is fluidly couplable to the product stream, a coalescer that is fluidly couplable to the product stream downstream from the first condenser along a first flow path, and a second condenser that is fluidly couplable to the product stream downstream from the first condenser along a second flow path. The system also includes a first valve positioned to regulate the flow of the product stream along the first flow path including a second valve positioned to regulate the flow of the product stream along the second flow path.

Disclosed are a support for a coalescer filter element, comprising a first and second end and a fluid flow bar having at least three fluid channels extending from the first end to the second end, a filtration system including a coalescer filter element disposed on the support, and a method for removing undesirable contaminants and / or fluids from a gas using the filtration system.

The invention provides a pipe-in-pipe type pre-separation water and electricity coalescence oil-water separation device and method, and relates to the technical field of oil field multi-phase separation, and the device comprises an inner pipe pre-separation section, an electrostatic coalescence section, a coalescer wiring section and a purified oil outlet section which are connected in sequence; the inner pipe pre-separation section comprises a produced liquid inlet pipeline, an oily sewage outlet pipeline and a perforated inner pipe pipeline, a water drainage hole is formed in the lower part of the inner pipe pre-separation section, and an oil drainage hole is formed in the upper part of the inner pipe pre-separation section; an inlet of the electrostatic coalescence section is connected with an outlet of the inner pipe pre-separation section through a flange, and an outlet is connected with the coalescer wiring section through a flange; the upper end of the coalescer wiring section is connected with the purified oil outlet section, and the lower end is connected with an outlet of the electrostatic coalescence section; and the purified oil outlet section comprises an exhaust port and a purified oil outlet pipeline. The separation device and method provided by the invention are suitable for the oil-water separation process of the produced liquid of offshore and land oilfields, realize the integrated treatment of the produced liquid, and have the advantages of small volume, short flow, high efficiency, compact structure and difficulty in breakdown.

A filter system includes a filter bowl, a filter cartridge removably positionable within the interior of the bowl, and a filter head removably mounted over the bowl. A flow restriction valve is held by the filter head. The flow restriction valve has a pin-receiving opening. The opening has a first cross-sectional shape. A pin is secured to the filter cartridge. The pin has a second cross-sectional shape, which is different from the first cross-sectional shape, and is configured to promote fluid flow around the pin when the filter cartridge is operably installed in the filter bowl. A coalescer filter cartridge includes a pin secured to or part of a hydrophobic screen assembly.

The utility model relates to a reaction kettle heating device which comprises a reaction kettle, the reaction kettle comprises a kettle body and a jacket, a heating coil is arranged in the jacket, the jacket is communicated with a heat conduction oil conveying pipe and a first heat conduction oil return pipe, and a first heat conduction oil storage tank is arranged on the heat conduction oil conveying pipe and the first heat conduction oil return pipe. A booster pump, a heat exchanger, an electric heater and a heat conduction oil filtering device are arranged on the heat conduction oil conveying pipe, a first high-pressure steam conveying pipe and a high-pressure steam output pipe are arranged on the heating coil, a first gas-liquid separation tank is arranged on the high-pressure steam output pipe and communicated with the heat exchanger, and a second gas-liquid separation tank is communicated with the heat exchanger. Silk screen coalescers are respectively arranged in the first gas-liquid separation tank and the second gas-liquid separation tank. The heat-conducting oil can be heated by utilizing energy carried by water vapor, so that electric energy consumed by heating the heat-conducting oil is reduced, and the heat-conducting oil heating device has a wide market prospect.

An apparatus for separating and treating produced water comprises a gas-liquid mixture (GLM) separating unit having GLM feed and discharge pipes and a water purification unit having a stack of plates and a device for discharging separated oil and pipes for discharging water and mechanical impurities. The GLM separating unit and the water purification unit are configured conjointly in the form of a horizontal tank containing coalescer stacks and having a vertical trap mounted on its upper surface, said trap being in the form of a dome with an open central pipe connected to the GLM feed pipe for introducing a GLM into the central pipe. The dome is equipped with a common pipe for discharging partially dehydrated GLM, discharged via the central pipe, and oil, discharged via the annulus of the dome. The technical result consists in simplifying the process for separating and treating produced water by creating a trap in a single apparatus that combines the functions of separating a gas-liquid mixture and treating and purifying water, including the removal of mechanical impurities.

The invention discloses a process and device for purifying electronic grade nitrous oxide from industrial waste gas, and specifically relates to the technical field of nitrous oxide production. The invention firstly adopts a water washing method to completely remove ammonia in the waste gas, and then removes the water vapor in the form of mist and ammonia dissolved in the water vapor mixed in the waste gas through a high-efficiency coalescer; the method of concentrating the nitrous oxide through an absorption tower and then purifying the nitrous oxide through low-temperature distillation avoids the possibility of nitrous oxide freezing in the low-temperature distillation system, is easier to operate, and produces less three wastes; ethanol is used as an absorbent, and the nitrous oxide of the raw gas is concentrated by an absorption method to ensure that the concentration of the nitrous oxide is greater than 60v%, and the concentrated gas is then removed by the low-temperature distillation system to remove light components and heavy component impurities, so that the top temperature of the low-temperature distillation tower can be controlled above the freezing point of the nitrous oxide, so that the problem of nitrous oxide freezing in the traditional low-temperature distillation system can be solved.

The utility model discloses a tank structure for liquid-liquid coalescence separation, which is used for liquid-liquid separation operation in petrochemical industry and comprises a tank body, an anti-disturbance liquid distributor, a first-stage plate-type coalescer, a second-stage fibration silk screen coalescer and a third-stage fibration silk screen coalescer, a feeding pipe is arranged on the left side of the interior of the tank body, and a feeding port of the feeding pipe is formed in the upper surface of the tank body; the first-stage plate-type coalescer is arranged at a position close to the feeding pipe; an anti-disturbance liquid distributor is arranged on the left side of the first-stage plate-type coalescer; the second-stage fibration silk screen coalescer and the third-stage fibration silk screen coalescer are arranged on the right side of the first-stage plate-type coalescer; the second-stage fibration silk screen coalescer and the third-stage fibration silk screen coalescer are arranged side by side; the discharging pipe is of an L-shaped structure, a discharging port of the discharging pipe is formed in the upper surface of the middle of the tank body, and an inlet of the discharging pipe is formed in the right side of the interior of the tank body. The liquid-liquid two-phase coalescer can be used for coalescing and separating the liquid phase and the liquid phase generated by reaction.

The invention relates to a filter insert (10) for a fluid filter device, comprising: i) at least one particle filter stage (12) for separating solid impurities (14) from the fluid (16) to be filtered, comprising at least one filter medium, ii) at least one coalescer stage (18), which is different from the particle filter stage (12), for agglomerating liquid impurities (20) dispersed in the fluid (16) to be filtered, and iii) at least one separation stage (22) at a distance from the coalescer stage (18) for separating agglomerated liquid impurities (20) from the fluid (16) to be filtered, comprising at least one first more hydrophobic layer (24), wherein the first more hydrophobic layer (24) has a contact angle for water of more than 90.2°, wherein the at least one coalescer stage (18) comprises: ii.1) a more hydrophilic layer (26), wherein the more hydrophilic layer (26) has a contact angle for water of 90.0° or less, and ii.2) a second more hydrophobic layer (28) which contacts the more hydrophilic layer (26) and / or is connected to the more hydrophilic layer (26), wherein the second more hydrophobic layer (28) has a contact angle for water of more than 90.2°.

The utility model discloses a hydrogen peroxide production hydrogenation tail gas recycling device, which belongs to the technical field of hydrogenation tail gas recycling devices and comprises a hydrogenation tower, a hydrogenation tail gas outlet of the hydrogenation tower is connected with a hydrogenation tail gas condenser, and the hydrogenation tail gas condenser is connected with a hydrogenation tail gas condensate receiving tank. A gas phase outlet at the top of the hydrogenated tail gas condensate receiving tank is connected with a hydrogenated tail gas coalescer, a liquid phase at the bottom of the hydrogenated tail gas coalescer is connected with an oil separation tank, a gas phase outlet at the top of the hydrogenated tail gas coalescer is connected with a waste liquid incinerator, and the other path of the gas phase outlet at the top of the hydrogenated tail gas condensate receiving tank is connected with a low-pressure torch; according to the device, aromatic hydrocarbon in tail gas is recycled and enters the waste liquid incinerator, meanwhile, hydrogen is separated out to serve as fuel of the low-pressure torch, resources are saved, and the environment is protected.

The utility model belongs to the technical field of waste lubricating oil regeneration, and particularly relates to a waste lubricating oil regeneration device based on multistage catalytic pretreatment. The waste lubricating oil regeneration device based on multi-stage catalytic pretreatment comprises a coalescer, the coalescer is connected with a feed port of a pre-hydrogenation reactor through a mixer, the lower portion of the pre-hydrogenation reactor is connected with a gas-liquid separation tank through a delivery pump A, the gas-liquid separation tank is connected with a hydrogenation reactor, the lower portion of the hydrogenation reactor is connected with a fractionating tower through a delivery pump B, and the fractionating tower is connected with a fractionating tower. The top of the fractionating tower is connected with a condenser which is connected with a product storage tank. According to the waste lubricating oil regeneration device based on multi-stage catalytic pretreatment, a catalyst is introduced into the pre-hydrogenation reactor stage by stage, so that refined treatment of waste lubricating oil is realized, and impurities are effectively removed by matching with the separation device; in addition, multi-raw-material composite feeding of waste lubricating oil and conventional raw materials is achieved, and the application range of the device is widened.