1946results about "Distillation separation" patented technology

A process for upgrading plastic derived oil includes contacting the plastic derived oil with a mixed catalyst in a first reactor, where the mixed catalyst includes a decontamination catalyst and a cracking catalyst different from the decontamination catalyst. The first reactor reduces concentrations of halogen-containing compounds in the plastic derived oil. The process includes passing the first reactor effluent to a second reactor and contacting the first reactor effluent with the cracking catalyst to produce a second effluent comprising light olefins and naphtha range hydrocarbons. The process includes separating used mixed catalyst from the first reactor to produce a used decontamination catalyst and a second used cracking catalyst, and regenerating the decontamination catalyst and cracking catalyst in separate regenerators to reduce exposure of the cracking catalyst to halogen-containing compounds produced during regeneration of the used decontamination catalyst.

The present invention relates to the technical field of water distillers, and disclosed are a thermocompression multi-effect water distiller system and a control method therefor. The thermocompression multi-effect water distiller system comprises a distillation unit and a control unit; the distillation unit comprises a multi-effect evaporator; the multi-effect evaporator is a horizontal tube falling film evaporator and has a side-by-side configuration, and the shell pass of a preceding effect evaporator is communicated with the tube pass of a following effect evaporator; the control unit controls the distillation unit during working, and the control unit is a feedforward-cascaded fuzzy PID model predictive control system and comprises an inner-loop control system and an outer-loop control system; the inner-loop control system uses fuzzy PID control, and the inner-loop control system is provided with a control system for fluctuations in industrial steam pressure Psteam; and the outer-loop control system uses model predictive control. In the present invention, by using the thermocompression multi-effect water distiller system and the control method therefor, the heat exchange efficiency is greatly improved; and a novel control system is provided, enabling normal operation within a range of 40-200% of a set operating condition.

The utility model relates to a reaction device capable of quickly heating, cooling and maintaining temperature. According to the reaction device, a three-way valve temperature control device consisting of a set of thermal medium circulator, a set of cold medium circulator, a control unit and two temperature control adjusting motor control three-way valve rotating devices is arranged on the reaction kettle, so that the temperature of the reaction kettle of the reaction device can be increased or decreased within half a minute (even shorter time); the problem that the reaction kettle cannot be rapidly heated and cooled in the reaction process is solved; for heat absorption and heat release experiments, the dynamic balance of the temperature can be maintained by setting a fixed reaction temperature; installation is simple, and operation is convenient; the problem of waste of water resources is solved; the temperature control range is wide, and when a water medium is used, the temperature control range is 1-95 DEG C; when a silicone oil medium is used, the temperature control range is-50 to 250 DEG C; the rotatable distillation head is mounted at the upper part of the reaction kettle and is directly rotated during use, so that the functions of condensation reflux and distillation extraction can be simultaneously realized.

The utility model discloses a device for removing impurities in trichlorosilane, relates to the technical field of polycrystalline silicon production, and mainly aims to improve the removal efficiency of the impurities in the trichlorosilane on the basis of not increasing the cost. According to the main technical scheme, the device for removing the impurities in the trichlorosilane is characterized in that an inlet of a first mixer is connected to one end of a first feeding pipe and a second feeding pipe, a plurality of baffle plates are arranged in a reaction tank in a staggered mode and used for forming a baffle channel in the reaction tank, and one end of the baffle channel is connected to an outlet of the first mixer; the other end of the baffling channel, the filter and an inlet of the separating tower are sequentially connected, the inlet of the separating tower is further connected to a siloxane conveying pipe, a tower kettle of the separating tower is connected to the other end of the first feeding pipe and used for guiding siloxane to the first mixer, and a top collecting pipe of the separating tower is connected to the rectifying unit; wherein the second feeding pipe is used for guiding a trichlorosilane and dichlorosilane mixture containing impurities to the first mixer.

Disclosed in the present invention is a method for co-producing 3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene. The method comprises: introducing 1,1,1,3-tetrachloropropane, 1,1,1,2,3-pentachloropropane, and hydrogen fluoride into a first reactor, and reacting under the action of a first catalyst to obtain a first reactor reaction product; performing rectification on the first reactor reaction product to obtain a 3,3,3-trifluoropropene product and a tower kettle product, mixing the tower kettle product with hydrogen fluoride, and then introducing the mixture into a second reactor, and reacting under the action of a second catalyst to obtain a second reactor reaction product; and separating the second reactor reaction product from hydrogen chloride, water washing, alkaline washing, and drying to obtain a 2,3,3,3-tetrafluoropropene product. The present invention has the advantages of simple process, high efficiency, flexible operation, low investment, and low energy consumption.

The invention relates to the technical field of lubricating oil processing, in particular to a waste lubricating oil regeneration distillation device, which comprises a tank body, a jacket is arranged on the outer side of the tank body, a heating cavity is formed between the jacket and the outer wall of the tank body, and the heating cavity adopts sectional heating and comprises a first section of heating cavity, a second section of heating cavity and a third section of heating cavity which are sequentially arranged from bottom to top, a first steam inlet branch pipe, a second steam inlet branch pipe and a third steam inlet branch pipe are correspondingly connected to the upper end of each section of heating cavity, a first steam outlet branch pipe, a second steam outlet branch pipe and a third steam outlet branch pipe are correspondingly connected to the lower end of each section of heating cavity, and a stirring mechanism is arranged in the tank body and comprises a stirring shaft, a stirring rod and a stirring motor. A partition plate in the tank body divides the tank body into a heat recovery cavity and a distillation cavity, and the bottom of the partition plate is communicated with a heat collection opening. The system achieves the functions of high efficiency, energy conservation, oil film formation prevention, heat recovery, preheating and the like, has remarkable economic benefits and social benefits, and is suitable for regeneration treatment of various waste lubricating oil.

The invention discloses a thin-layer high-density filler which is prepared by combining an optimized weaving method, weaving density and a bundling mode on the basis of a plain woven wire mesh filler. The novel weaving method enables the weft number of the thin-layer high-density filler to be larger than that of plain woven wire mesh filler under the condition of the same warp number, and the thin-layer high-density filler has the characteristics of high specific surface area, high mass transfer efficiency, low flow pressure drop and the like. A large number of micropores exist on the surface of the thin-layer high-density filler, the wettability is extremely good, the transverse diffusion effect of liquid in the filler can be greatly enhanced due to the fact that the weft density is large, the performance is particularly outstanding in the processes of large-spraying-density rectification and the like, and the pressure drop is about 30%-50% lower than that of a common plain woven filler. The filler provided by the invention mostly adopts stainless steel wires as raw materials, and has the advantages of low cost, large flux, stable performance and low metal exudation rate, so that the filler is difficult to replace in the field of heat pump rectification, high-purity electronic chemical separation, intermediate separation and isomerism separation production.

To provide a method for recovering oil from an oil-containing waste liquid, enabling efficient separation and recovery of oil from the oil-containing waste liquid through a solvent extraction method.SOLUTION: The method for recovering oil from an oil-containing waste liquid includes: an extraction step for extracting an oil-containing waste liquid using a solvent, thereby transferring oil in the oil-containing waste liquid to the solvent; a separation step for separating the solvent including the extracted oil and the waste liquid from each other; and an oil recovery step for separating and recovering the oil from the separated solvent-containing oil. In the method for recovering oil, the solvent is n-hexane, an oil concentration in the oil-containing waste liquid supplied to the extraction step is 1,000-5,000 mg / L, a volume ratio (solvent / waste liquid ratio) of the solvent to the oil-containing waste liquid is 0.01-0.05, and the oil concentration in the solvent containing the oil separated in the separation step is 4 mass% or more.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of rose essential oil preparation, in particular to a distiller for rose essential oil preparation, which improves the distillation efficiency, can clean the inside, ensures normal use, is convenient to move integrally and is beneficial to wide popularization. Comprising a distillation cylinder, a heating sleeve and a condensation mechanism, the outer wall of the distillation cylinder is sleeved with the heating sleeve, and the input end of the condensation mechanism is connected with the top output end of the distillation cylinder; the bottom end of the distillation cylinder is installed at the top end of the base, the base is installed at the top end of the moving mechanism, the water tank is installed at the left end of the top of the moving mechanism, the water tank is provided with the water adding opening and communicated with the distillation cylinder, and a supporting assembly is installed on the lower portion of the moving mechanism. The stirring mechanism is mounted in the distillation cylinder, a feeding hole is formed in the right end of the top of the distillation cylinder, and the feeding mechanism is mounted at the feeding hole.

The utility model discloses a distillation retort for extracting polygonatum odoratum snow pear herbal drink, and relates to the technical field of distillation equipment, the distillation retort comprises a distillation heating retort main body, the top of the distillation heating retort main body is provided with a cover plate, a limiting rod penetrates through the inside of the cover plate, the outer wall of the cover plate is provided with a feed port, the outer wall of the cover plate is provided with a discharge port, and the discharge port is provided with a discharge port. And a sliding rod is mounted on the inner wall of the bottom of the cover plate. Through the arrangement of the sliding rod, the inductor, the sliding sleeve and the floating ball, when a raw material solution is added into the distillation heating tank main body through the feeding hole, the floating ball floats along with the surface of the raw material solution, and the liquid level in the distillation heating tank main body continuously descends through continuous distillation, and when the floating ball descends to the lowest point along with the liquid level, the floating ball is stopped. The floating ball is in contact with the inductor to trigger an alarm to remind a worker of shutdown or continuous addition of a raw material solution, so that dry burning in the distillation heating tank main body is avoided, and the safety of the distillation process of the distillation heating tank main body is improved.

The invention relates to evaporation and purification equipment for electronic grade hydrochloric acid, which comprises a tank body, the tank body is provided with a liquid inlet and a vapor phase outlet, and the bottom of the tank body is provided with a heating pipe; the partition plate is arranged at the position, located above the heating pipe, in the tank body, the partition plate is longitudinally provided with a plurality of filler storage grooves, movable plates moving up and down are arranged in the filler storage grooves, the movable plates are provided with a plurality of through holes allowing steam to pass through, and the filler storage grooves are filled with filler particles; the number of the filler particles is in positive correlation with the pressure generated by the filler particles to the bottom of the tank body; the cache box body comprises a fixed box body and a movable box body; the lifting driving part is arranged at the bottom of the tank body, the telescopic end of the lifting driving part is connected to the movable plate, the movable plate is provided with a connecting rod for driving the movable box body to move, and the lifting driving part drives the movable plate and the connecting rod to move upwards in the extending process so as to gradually push the filler particles into the movable box body.

The utility model discloses equipment for producing high-purity methyl ethyl ether, which relates to the field of synthesis of chemical compounds and comprises a reaction device, a heating component, a cold bath tank, a crude product receiving tank, a heavy component removal tower, a light component removal tower, a first reboiler, a second reboiler, a first condenser, a second condenser, a recovery tank, a product receiving tank and a controller, raw materials including sodium methoxide and halogenated ethane directly react under the anhydrous condition, a catalyst is not needed, crude methyl ethyl ether is produced, then the crude methyl ethyl ether enters a heavy component removal tower, crude methyl ethyl ether gas with heavy components removed enters a light component removal tower from the top of the light component removal tower after being detected to be qualified through a first online analysis and detection component, light component removal rectification is conducted, and methyl ethyl ether is obtained. Gas-phase impurities at the top of the light component removal tower are analyzed through the second online analysis and detection part, when the gas-phase impurities are detected to be qualified, the methyl ethyl ether product enters the product receiving tank, and then the high-purity methyl ethyl ether product is produced through continuous rectification, so that the product purity is high, the reaction temperature is low, the energy consumption is reduced, the reaction yield is high, and the production cost is low.

Systems and methods for crude oil desalting technology are provided. More specifically, systems and methods for the usage of waste heat from compression to treat high salinity water are provided. The systems and methods generate recycled water streams for desalter treatment. The systems and methods can treat high salinity waters from desalters and dehydrators. The high salinity streams are introduced to the compressed gas streams, where the waste heat causes the water portion of the water streams to evaporate, resulting in a fully or near-saturated gas stream and a concentrated waste water stream. The saturated gas streams are cooled and condensed, and low TDS water is separated from the gas stream in knockout drums. The low TDS water can be reintroduced to the desalting system as wash water, generating a circular water reuse.

The invention provides a system and a method for producing high-purity electronic-grade carbonic ester, and the system comprises a heterogeneous reaction section, a separation section and a crystallization section along the material flow direction, the heterogeneous reaction section is used for carrying out heterogeneous reaction on ethylene oxide and carbon dioxide to prepare carbonic ester; the separation section is used for separating materials from the heterogeneous reaction section and comprises a flash evaporation unit and a rectification unit in the material flow direction, and the flash evaporation unit comprises at least one flash evaporation tank; the rectification unit comprises at least one rectification tower, and the side-draw of the rectification unit is communicated with the feed port of the crystallization section; and the crystallization section is used for crystallizing and purifying the material mainly containing carbonic ester from the separation section. According to the method, high-purity ethylene carbonate used as a power battery can be obtained from the crystallization section, and crystallization mother liquor can be selectively returned to the separation section to be concentrated. The method can effectively improve product purity, reduce product chromaticity and reduce energy consumption, and can be applied to industrial production of carbonic ester.

The invention relates to the technical field of turpentine processing, in particular to a turpentine continuous melting and clarifying processing device and method.The turpentine raw material is put into a feeding cylinder, piled in an inclined scattering cylinder, subjected to axial autorotation along with the feeding cylinder, discharged downwards and distributed in all areas in a dissolving tank, and after dissolving is completed, the turpentine raw material is poured into the feeding cylinder to be subjected to continuous melting and clarifying processing. When the telescopic part drives the sieve plate to move upwards until the bottom end of the movable cylinder abuts against the sieve plate, the sieve plate axially rotates along with the feeding cylinder and drives the movable cylinder to axially rotate, so that the material leakage port and the material scattering port are staggered, the movable cylinder rolls solid matters in the circumferential direction of the sieve plate, and the resin liquid is discharged into the clarifying tank along the liquid leakage pipe while slag is discharged from the slag outlet; after grease water in the clarification tank is layered, most of the water layer is discharged, the grease water is put into the feeding cylinder for circular treatment, and the steam injection system and the emptying pipe in the clarification tank are opened for distillation treatment, so that the continuous processing efficiency is further improved.

The invention discloses a furan distillation and purification device for tetrahydrofuran raw materials, which comprises a distillation box, a preheating channel, a distillate flow guide assembly and a multi-stage filter assembly, and the multi-stage filter assembly comprises a first ultrafiltration membrane treatment mechanism, a second ion exchange resin treatment mechanism and a third molecular sieve treatment mechanism. The upper part of the feeding end of the distillation box is connected with a preheating channel, and inner inclined plates are arranged at the bottom of the distillation box and below the preheating channel. According to the furan distillation and purification device for the tetrahydrofuran raw material, when an existing furan distillation and purification device is used for treating a furan solution, although part of impurities can be removed, the purification effect is not thorough, and impurity residues still exist; meanwhile, the device is high in energy consumption in the distillation and extraction process and needs to depend on the combined use of a plurality of devices, so that the operation complexity is increased, the large loss is caused in the material conveying process, and the overall purification efficiency and the product quality are influenced.

The invention discloses a trace volatile component non-hot gas stripping separation device and method, the device comprises a tower body, the top of the tower body is provided with a liquid feed port and a gas discharge port, and the bottom of the tower body is provided with a liquid discharge port and a gas feed port; the tower plates are arranged in the tower body, each turbulent element is arranged between every two adjacent tower plates, and a downcomer is fixedly arranged on one side of each tower plate in a penetrating manner; the turbulent element comprises a partition plate coaxially arranged in the gravity direction, and a small rotational flow cavity, a large rotational flow cavity and a liquid seal pipe which are communicated in sequence; and a tangential gas inlet is formed in the side wall of the large rotational flow cavity. According to the device disclosed by the invention, the turbulent elements are additionally arranged between the tower plates, and mass transfer is enhanced by utilizing gas-liquid turbulent contact, so that the gas stripping purification efficiency of unit tower height can be improved, and the carrier gas consumption in a non-hot gas stripping process and the separation cost of trace volatile components are reduced.

The utility model relates to the technical field of distillation, and discloses an efficient distillation device for plant extraction, which comprises a heating main body, the heating main body comprises a heating tank and a distillation tank, the distillation tank is arranged on the inner side of the heating tank, the inner wall of the heating tank is fixedly connected with a plurality of groups of steam rings, and the steam rings are connected with the heating tank. When the device is used, the distillation retort can be mounted on the inner side of the heating tank, and the outer wall of the distillation retort is uniformly sleeved with the multiple groups of steam rings, so that steam generated by heating of the steam box enters the connecting pipe through the air inlet pipe and then is transmitted into the multiple steam rings through the connecting pipe; and finally, the steam is sprayed out by the spray head, so that the steam sprayed out by the spray head can be used for heating the juice in the distillation retort, and the spray head uniformly surrounds the outer wall of the distillation retort, so that the distillation retort is quickly and uniformly heated, and the distillation efficiency of the distillation device for plant extraction is effectively improved.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The invention relates to the technical field of fatty acid zinc soap preparation, in particular to a method and equipment for preparing a fatty acid zinc soap mixture, the equipment comprises a shell and a heat conduction inner container, the heat conduction inner container is installed on the inner side wall of the shell, and a cavity is formed between the heat conduction inner container and the shell; the device further comprises a stirring device, a discharging device, a conveying device, a feeding pipe, a rotating shaft and a spiral blade, the feeding pipe is installed on the outer side wall of the shell, the output end of the feeding pipe communicates with the heat conduction inner container, the rotating shaft is rotationally installed on the stirring device, the spiral blade is installed on the outer side wall of the rotating shaft, and the stirring device is used for oppositely stirring a mixture in the heat conduction inner container. The stirring device is used for driving the rotating shaft to rotate, the discharging device is arranged at the bottom end of the shell in a communicating mode, and the discharging device is used for controlling discharging of materials in the shell; the mixing processing efficiency of raw materials is improved, the mixing uniformity of the fatty acid zinc soap is improved, the fatty acid zinc soap can be conveniently prepared and processed in the heat conduction inner container through different procedures, and the production efficiency is improved.

The utility model discloses a dilute ammonia water concentration device which comprises a stripping tower, a stripping tower condenser positioned at the top of the stripping tower and communicated with the stripping tower, and an absorption tower connected with the stripping tower condenser, the stripping tower condenser comprises a gas phase outlet arranged at the top and a liquid phase outlet arranged at the bottom, the liquid-phase outlet is connected with a liquid-phase inlet in the upper part of the absorption tower through a pipeline; and a gas phase outlet at the top of the stripping tower condenser is connected with a gas phase inlet at the lower part of the absorption tower sequentially through a vacuum buffer tank and a vacuum pump by virtue of a pipeline. The device is short in process, simple in equipment structure, green, energy-saving, safe, environment-friendly and wide in practicability; the height difference between the outlet of the condenser of the stripping tower and the inlet of the absorbent of the absorption tower is utilized, so that the absorbent can flow into the absorption tower from the condenser through gravity flow, the arrangement of a pump is reduced, and the total energy consumption is reduced.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The utility model discloses a pharmaceutical distillation device with an additional fixing structure, which comprises a distillation retort, a support frame is fixedly mounted in the middle of the upper end of the distillation retort, a driving device is fixedly mounted at the upper end of the support frame, and the output end of the driving device is in transmission connection with a bevel gear III; the two sides of the inner wall of the supporting frame are rotationally connected with second bevel gears, and one sides of the two second bevel gears are engaged with the two sides of the outer surface of the third bevel gear. According to the utility model, the heating device is started to heat liquid medicine in the distillation retort, and meanwhile, the driving device is started, so that the feeding blade rotates in the feeding barrel, the liquid medicine at the bottom of the distillation retort enters the feeding barrel from the feeding hole, and the liquid medicine is conveyed up from the bottom of the distillation retort by the feeding blade; a third bevel gear, a second bevel gear and a first bevel gear are matched, and a stirring frame stirs the conveyed liquid medicine, so that the liquid medicine in the distillation retort is uniformly heated, and the distillation efficiency is improved.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastic via the polymerization of dienes prior to further treatments.

A sustainable system for removing and concentrating per- and polyfluoroalkyl substances (PFAS) from water. The system includes an anion exchange vessel having a selected anion exchange resin therein configured to remove PFAS from the water. A line coupled to the vessel introduces a flow of water contaminated with PFAS such that the PFAS bind to the selected anion exchange resin and are thereby removed from the water. A regenerant solution line is coupled to the anion exchange vessel to introduce an optimized regenerant solution to the anion exchange vessel to remove the PFAS from the anion exchange resin, thereby regenerating the anion exchange resin and generating a spent regenerant solution comprised of the removed PFAS and the optimized regenerant solution. A separation and recovery subsystem recovers the optimized regenerant solution for reuse and separates and concentrates the removed PFAS.

The utility model provides an energy-saving device for producing sodium methoxide, which comprises a reaction tower, a rectifying tower and a recovery tower which are connected in sequence, tower kettles of the rectifying tower and the recovery tower are respectively provided with a rectifying tower reboiler and a recovery tower reboiler, and a reaction tower reboiler is arranged in a tower kettle of the reaction tower. The tower top of the rectifying tower is connected with a tower kettle of the reaction tower through a rectifying tower gas phase pipeline I, a compressor I is arranged on the rectifying tower gas phase pipeline I, the rectifying tower gas phase pipeline I is connected with a rectifying tower gas phase pipeline II, the rectifying tower gas phase pipeline II is connected with the recovery tower reboiler, and a compressor II and a compressor III are arranged on the rectifying tower gas phase pipeline II; the rectifying tower gas phase pipeline II is connected with a rectifying tower gas phase pipeline III, the rectifying tower gas phase pipeline III is connected with a rectifying tower reboiler, and a rectifying tower reboiler discharge pipeline and a recovery tower reboiler discharge pipeline are respectively connected with the middle upper part of the rectifying tower; the energy utilization efficiency can be greatly improved, the energy consumption can be reduced, and the product purity can be improved.

The invention relates to a continuous production process and device of vinylene carbonate, chloroethylene carbonate, tertiary amine and a solvent are continuously fed in a reactor for dechlorination reaction, and temperature is controlled by a tubular heat exchanger; the reaction liquid continuously overflows from a side overflow port to enter a middle receiving tank, a vinylene carbonate crude product is obtained after desolvation, the vinylene carbonate crude product enters a melt crystallizer for melt crystallization after being purified by a low-component removal tower, a high-component removal tower and a rectifying tower, and a vinylene carbonate product with the purity of 99.99% or above is obtained; a reaction by-product tertiary amine hydrochloride settles to the lower part of the reactor, is discharged from the bottom of the reactor after being subjected to countercurrent washing by inputting a solvent through a salt leaching cavity, enters a neutralization kettle, is neutralized by liquid caustic soda and then is subjected to liquid separation, an organic phase enters a recovery system to be dehydrated, and then sequentially passes through a solvent recovery tower to recover the solvent and a tertiary amine recovery tower to recover tertiary amine; and the solvent and the tertiary amine can be recycled. The continuous production of the vinylene carbonate is realized, the consumption of raw materials is reduced, and the yield and the production efficiency are improved.

The invention provides molybdenum sulfide powder, a heavy metal adsorbent, a photo-thermal conversion material, a distillation method, an oxygen reduction catalyst and catalyst ink. This molybdenum sulfide powder contains a 3R crystal structure of molybdenum disulfide. The heavy metal adsorbent according to the present invention contains molybdenum sulfide particles having a median diameter (D50) of 10-1000 nm as determined by a dynamic light scattering type particle size distribution measurement device. This photo-thermal conversion material contains a material containing molybdenum sulfide particles, and generates heat by absorbing light energy.

Systems and processes for cracking hydrocarbons to produce light olefins include an FCC reactor utilizing counter-current flow that includes a reaction zone comprising an elongated reaction tube that has a feed inlet, a product outlet, and a catalyst inlet. In embodiments, the FCC reactor further includes a freeboard zone. The freeboard zone is configured to reduce a superficial velocity of the cracked hydrocarbon fluids in the reaction zone, causing catalyst entrained in the cracked hydrocarbon fluids to at least partially separate from the cracked hydrocarbon fluids. In embodiments, the FCC reactor includes a dense fluidized bed unit. The dense fluidized bed unit is configured to inject a fluidizing gas such that bubbles are formed within the solid particles of the dense fluidized bed of solid particles, which causes the catalyst to overflow from the dense fluidized bed of solid particles into the reaction zone.

The invention provides a flexible switching production method and equipment for low cis-polybutadiene rubber (LCBR), solution polymerized styrene-butadiene rubber (SSBR) and hydroxyl-terminated liquid polybutadiene rubber (HTPB), the flexible switching production equipment comprises an initiator production device and a polymerization unit, and the flexible switching production method comprises the following steps: mixing cyclohexane and n-hexane according to a volume ratio of 6.5: 3.5-7: 3, adding an initiator, and stirring to obtain a mixture; forming a mixed solvent; the method comprises the following steps: adding a monomer, an active agent, an initiator and a mixed solvent into a polymerization kettle 31 of a polymerization unit, and carrying out polymerization reaction to obtain a low-cis-polybutadiene, solution polymerized styrene-butadiene or hydroxyl-terminated liquid polybutadiene rubber solution; a novel protection initiator tert-butyl dimethyl siloxy propyl sodium is designed, and hydroxyl-terminated liquid polybutadiene rubber with a controllable structure is prepared through anionic living polymerization. According to the process, shutdown for kettle cleaning is not needed, the low cis-polybutadiene, the solution polymerized styrene-butadiene and the hydroxyl-terminated liquid polybutadiene rubber can be produced on the same polymerization device in a flexible switching manner, and the overall production efficiency is improved.