451results about "Flash distillation" patented technology

The utility model relates to a sludge drying system coupled with a heat storage system. The sludge drying system comprises a heat storage module, a sludge drying module, a waste heat collecting module and a waste heat upgrading module, the heat storage module is used for storing peak regulation steam energy of the power plant; the sludge drying module is connected with the heat storage module, comprises a plurality of drying machines which are connected in parallel, and is used for drying sludge by utilizing low-pressure steam; the waste heat collecting module is connected with the sludge drying module and is used for recycling high-temperature waste gas waste heat; the waste heat quality improving module is connected with the waste heat collecting module and used for improving the quality of the waste heat and recycling the waste heat. The utility model has the beneficial effects that the drying technology is coupled with a boiler system, so that steam energy which is difficult to store is converted into storable and combustible fuel, the deep peak regulation of a power plant is facilitated, the scale of a heat storage system is reduced, and the economical efficiency of the system is improved.

The invention belongs to the field of industrial flue gas purification technology and energy conservation, and relates to a system and a method for removing condensable particulate matters through multi-field coupling synergistic enhanced condensation, the system comprises a desulfurization tower, a flash tank, a condensation structure, a liquid collecting tank and a cold water spraying layer, a slurry distribution layer of the flash tank is connected with a tower kettle of the desulfurization tower, and a flash slurry pool of the flash tank is connected with the slurry spraying layer; the liquid collecting tank, the condensation structure and the cold water spraying layer are sequentially arranged from bottom to top and are integrated in the same shell to form a secondary removal device capable of condensing particles, the secondary removal device is communicated with the top of the desulfurization tower, and flue gas channels are uniformly distributed on the liquid collecting tank; the condensation structure is formed by combining a plurality of obliquely-arranged wave-shaped condensation plates in parallel, the surfaces of the wave-shaped condensation plates are arranged in a hydrophobic mode, a plurality of protrusions and pits are arranged on the faces, facing flue gas, of the wave-shaped condensation plates, and condensable particles in the flue gas can be effectively removed.

The invention discloses a method and a device for removing alcamines in NMP (N-Methyl Pyrrolidone), which comprises the following steps: reacting anhydride substances with NMP containing the alcamines substances to generate NMP containing amide substances; the NMP solution containing the amide substances is rectified to remove the amide substances, and NMP with the alcohol amine substances removed is obtained; the boiling point of the product is increased in a manner that anhydride substances react with alcohol amine substances in NMP to generate amide, so that the difference value between the reacted product and the boiling point of NMP is greater than the difference value between the alcohol amine substances and the boiling point of NMP, high-purity NMP is more easily separated in a subsequent rectifying tower, the energy consumption of the rectifying tower for separating the product and impurities can be reduced, and the production cost is reduced. In addition, due to the fact that different alcohol amine additives do not need to be added additionally, universality is improved, meanwhile, the anhydride reaction belongs to amidation reaction, reaction products are more stable, free amine cannot be decomposed in the high-temperature heating process, and therefore the purity of the separated NMP can be further improved.

The present application relates to a kind of heat pump rectification systems based on heat shock flash circulation lift heat exchange, including rectifying tower, lift membrane reboiler, first throttling valve and heat shock heater, the secondary steam outlet of rectifying tower is connected with the heating steam import of lift membrane reboiler, the discharge port of the bottom of rectifying tower is connected with the cold side flow channel import of heat shock heater, and the cold side flow channel export of heat shock heater is connected with the feed inlet of lift membrane reboiler by first throttling valve;The vapor-liquid mixture outlet of lift membrane reboiler is connected with the column still liquid reflux port of rectifying tower, and the steam condensate outlet of lift membrane reboiler is connected with condensate tank, and the liquid outlet of condensate tank is connected with the condensate reflux port of rectifying tower side wall.The present application is combined by heat shock pressurization energy storage and throttling flash kinetic energy release, provides independent and stable lift membrane kinetic energy for lift membrane heat exchange, so that the flow pattern in the tube of lift membrane reboiler directly enters the efficient annular flow stage, improves the industrial applicability of lift membrane heat exchange technology in heat pump rectification system.

The present application relates to a kind of hot exciting flash evaporation loop lift heat exchanger, including upper head, lower head, cylinder, several heat exchange tubes, the upper end surface of cylinder and the upper head form cavity I between, the lower end surface of cylinder and the lower head form cavity II between, cavity I, cavity II and the inner cavity of cylinder are not communicated with each other between, heat exchange tube is fixed in the inside of cylinder by tube sheet, the upper end of heat exchange tube is placed in cavity I and is communicated with cavity I, lower end and cavity II are communicated, cylinder includes lift section cylinder and hot exciting section cylinder, heat exchange tube includes lift section heat exchange tube and hot exciting section heat exchange tube, lift section heat exchange tube and hot exciting section heat exchange tube are communicated by throttling component between, the inner diameter of throttling component is less than the inner diameter of hot exciting section heat exchange tube.The heat exchanger of the present application is provided with a kind of hot exciting flash evaporation loop lift, will hot exciting pressurization energy storage, throttling flash evaporation kinetic energy release, loop lift heat exchange and vapor-liquid separation function integration in same equipment, solve the problem of traditional lift section heat exchanger dependence big temperature difference.

The invention relates to the technical field of aluminum oxide production, and discloses evaporation forced-effect jet flash evaporation equipment which comprises a storage tank, a heating box is arranged outside the storage tank, an air guide pipe is arranged on the side wall of the storage tank, a flash evaporator is arranged outside the air guide pipe, a conveying pipe is arranged in the heating box, and a flash evaporator is arranged in the conveying pipe. A discharging table is fixedly connected to the lower side of the flash evaporator, a mounting block is fixedly connected to the side wall of the flash evaporator, a flow dividing pipe is fixedly connected to one end of the mounting block, a guiding assembly is arranged on the side wall of the flow dividing pipe, and a flow guiding block is fixedly connected to the interior of the flow dividing pipe. The steam pushes the cleaning assembly to rotate, meanwhile, the steam firstly passes through the flow guide block, and tiny crystals mixed in the steam are preliminarily filtered under the filtration of the flow guide block, so that the effects of preheating the mother liquor in advance, realizing self-circulation of the mother liquor, reducing the use of a circulating pump and further reducing the power consumption of the device can be achieved.

The invention relates to the technical field of chemical equipment, and discloses a sodium carbonate production system adopting an ammonia-soda process. The system for producing sodium carbonate by the ammonia-soda process comprises a thin liquid distillation tower and a flash evaporation module. The thin liquid distillation tower is used for discharging waste thin liquid; the flash evaporation module comprises a second flash evaporation device and a water injection assembly; a steam outlet of the second flash tank is communicated with a steam inlet of the thin liquid distillation tower; the water inlet end of the water injection assembly is communicated with the thin liquid distillation tower, and the water outlet end of the water injection assembly is located in the second flash tank and used for discharging waste thin liquid to flush flash steam in the second flash tank. According to the invention, by arranging the water injection assembly, the waste thin liquid discharged from the thin liquid distillation tower is introduced into the second flash tank for flushing flash steam in the second flash tank so as to flush away droplets in the flash steam, and the content of calcium ions introduced into the thin liquid distillation tower can be reduced, so that the calcium ions in the waste thin liquid are reduced and even eliminated; and the waste thin liquid discharged from the thin liquid distillation tower can be used as filtering washing water.

The utility model belongs to the technical field of asphalt modification, and particularly relates to a modification system for tar distillation asphalt, which comprises a tar distillation tower, a tubular furnace, a flash tower and a modified asphalt storage tank, and is additionally provided with an asphalt circulating tower, and the output end of the tar distillation tower is connected with the new material input end of the asphalt circulating tower; the liquid output end of the asphalt circulating tower is connected with the input end of the tubular furnace, the output end of the tubular furnace is respectively connected with the circulating material input end of the asphalt circulating tower and the input end of the flash tower, and the circulating material input end of the asphalt circulating tower and the input end of the flash tower are respectively provided with a stop valve. And the liquid output end of the flash tower is connected with the input end of the modified asphalt storage tank. According to the utility model, the asphalt circulating tower is additionally arranged, and the asphalt can be selectively conveyed into the asphalt circulating tower to be circularly heated or conveyed into the flash tower to be flashed by utilizing the stop valve on the tubular furnace, so that the quality of the modified asphalt is controllable.

The utility model provides a comprehensive utilization device for process wastewater in a polyvinyl alcohol manufacturing and recycling process, which is provided with a pressurized rectifying tower and a second rectifying tower, wastewater generated in a polyvinyl alcohol production process is used as a raw material, is fed into the pressurized rectifying tower after being subjected to heat exchange through a feeding preheater, and is subjected to heat exchange with a second reboiler; a kettle-out material serves as a heat source to be fed into a feeding preheater and then is fed into a flash tank to be subjected to flash evaporation after heat exchange is completed, the flash tank is subjected to grading treatment according to different components, a gas phase at the top of the pressurized rectifying tower serves as a heat source to be fed into a second reboiler, formed condensate is fed back to a pressurized reflux tank to be subjected to reflux and distillation, and a gas phase at the top of a second rectifying tower is divided into two paths to be fed out; one path is used for air blowing, and the other path is provided with a regulating valve, is sent into the condenser for condensation and then returns to the second reflux tank. According to the utility model, a thermal coupling technology is introduced, heat in waste water is recycled, maximum utilization of energy is realized, and methanol and PVAC resin contained in the waste water can be removed at the same time.

The utility model discloses a refining device and a refining system for ultra-clean polypropylene. The refining device comprises a slurry premixing tank, a washing container, a centrifugal filter, a solvent recovery tower, a reflux tank, a fluidized bed dryer and a gas-liquid separator. According to the device, materials and energy are fully recycled, ash such as metal substances and oligomer entrained by polypropylene powder can be effectively reduced, and even electrical-grade polypropylene can be obtained. According to the utility model, on the premise of obtaining a refined polypropylene product, environment-friendly, low-consumption and stable long-period operation can be realized.

The flash evaporation kettle comprises a kettle body, a plurality of evenly-distributed supporting rods are connected to the position, close to the bottom, of the outer wall of the kettle body, a round block is connected to the position, close to the top, in the kettle body in a sliding mode, the bottom of the round block is movably connected with an upper pipe body, the top of the upper pipe body is arranged in a closed mode, and the bottom of the upper pipe body is connected with a flash evaporation device. The bottom of the upper pipe body is connected with a lower pipe body through a bolt, the bottom of the lower pipe body is closed, a feeding pipe is connected to the position, close to the top, of the left side of the kettle body in a penetrating mode, a feeding port is formed in the left side of the upper pipe body, and the bottom of the kettle body is communicated with a discharging pipe. According to the technical scheme, through mutual cooperation of the round block, the electric push rod, the rotating motor, the upper pipe body, the lower pipe body and other components, intermittent feeding can be conducted, effective and uniform flash evaporation can be conducted, the flash evaporation efficiency is improved, effective retention and swinging can be conducted, the full contact reaction can be conducted, and the service life of the device is prolonged. The contact reaction efficiency is improved.

The present application relates to the technical field of coal-to-ethanol, and discloses a low-temperature heat combined utilization system of a coal-to-ethanol device, which comprises a heat medium storage tank, a flash steam-gray water heat exchanger, a heat medium-flash steam heat exchanger, an ethanol refining tower body, an ethanol light component removal tower body and a methanol ester removal tower body, the heat medium storage tank is connected with the heat medium-flash steam heat exchanger through a heat medium booster pump, and the flash steam-gray water heat exchanger is connected with the heat medium-flash steam heat exchanger; the ethanol refining tower body is connected with an ethanol refining tower heat medium reboiler and an ethanol refining tower steam reboiler, the ethanol light component removal tower body is connected with an ethanol light component removal tower heat medium reboiler and an ethanol light component removal tower steam reboiler, and the methanol ester removal tower body is connected with a methanol ester removal tower heat medium reboiler and a methanol ester removal tower steam reboiler; and the heat medium storage tank, the heat medium-flash steam heat exchanger, the ethanol refining tower heat medium reboiler, the ethanol light component removal tower heat medium reboiler and the methanol ester removal tower heat medium reboiler form a closed loop.

A method for producing a high purity product sulfide from an olefin is provided. 【Solution means】Hydrogen sulfide or R 1 SH, and a method for producing a high purity product sulfide from an olefin of the formula C x H (2x) comprising the steps of: feeding hydrogen sulfide or R 1 SH, and an olefin of the formula C x H (2x) to a reactor system; separating the reactor effluent stream into a first portion and a second portion; recycling the first portion of the reactor effluent stream to the reactor system; and feeding the second portion of the reactor effluent stream to a sulfide separation system, the sulfide separation system comprising: at least one recycle stream comprising at least a portion of unreacted hydrogen sulfide, unreacted olefin of the formula C x H (2x) unreacted R 1 SH, and other components, and a product stream comprising the high purity product sulfide.

The invention relates to polymer desolventizing separation equipment, a solvent removal device and a solvent removal method, in particular to the technical field of polymer recovery, the polymer desolventizing separation equipment comprises a polymer solution inlet end, an annular baffle area, a spiral-flow type umbrella-shaped distributor, a pore plate area and a polymer outlet end which are communicated in sequence; a solvent outlet is formed in the annular baffle plate area. According to the polymer desolventizing agent separation equipment provided by the invention, the specific spiral-flow type umbrella-shaped distributor is matched with the pore plate flow equalizing assembly, during working, a polymer solution enters the separation equipment after being heated and is converted into a spiral-flow wall-attached flow through the spiral-flow type umbrella-shaped distributor, and the spiral flow generates centrifugal acceleration and forms a synergistic separation force with gravity; and then a spiral columnar laminar flow beam is formed through the pore plate flow equalizing assembly, efficient phase splitting is achieved in a phase splitting area in a full liquid state, finally, a top light phase is recycled, and the content of a bottom heavy phase polymer is increased to 60%-70%.

This invention relates to the field of carbon capture technology, specifically to a waste heat recovery and utilization system. The system includes a preheating unit, a flash tank, and a waste heat recovery unit. The preheating unit preheats the rich liquid. The flash tank has a first inlet, a first outlet, and a second outlet. The first inlet is connected to the preheating unit. The waste heat recovery unit includes a first heat exchanger and a second heat exchanger. The inlet of the first heat exchanger's first heat exchange channel is connected to the first outlet to receive flash vapor. A first heat exchange medium flows through the second heat exchanger's second heat exchange channel, exchanging heat with the flash vapor. The inlet of the third heat exchanger's second heat exchange channel is connected to the second outlet to receive flash liquid. A second heat exchange medium flows through the fourth heat exchanger's fourth heat exchange channel, and this heat exchange medium can exchange heat with the rich liquid in the preheating unit. This waste heat recovery and utilization system can utilize the system's waste heat to fully preheat the rich liquid, improving energy utilization efficiency.

The application relates to the technical field of calcium carbonate preparation, and provides a flash evaporation dust removal device and a calcium carbonate preparation process.The flash evaporation dust removal device comprises a first filter kettle, a second filter kettle and a filter assembly, a baffle is arranged in the first filter kettle, the baffle separates the first filter kettle into a speed reduction zone and a slow flow zone, and the first filter kettle is provided with an air inlet pipe communicating with the speed reduction zone; the second filter kettle is provided with a filter cavity, the filter assembly is arranged in the filter cavity, and the second filter kettle is provided with an air outlet pipe communicating with the filter cavity; and a connecting pipe is arranged between the first filter kettle and the second filter kettle, the inlet end of the connecting pipe communicates with the slow flow zone, and the outlet end of the connecting pipe communicates with the filter cavity.The flash evaporation dust removal device can prolong the service life of the dust removal device.

The invention discloses a heat pump system of a low-temperature methanol washing heat regeneration tower. The cost can be reduced. A tower kettle liquid pump sends tower kettle liquid into a high-temperature flash tank, the saturation temperature in the tower kettle liquid flash process is reduced to be lower than the tower top gas temperature, after flash evaporation, a gas phase enters a high-temperature compression stage front demister, a liquid phase enters a high-temperature evaporator, the tower kettle liquid passing through the high-temperature evaporator absorbs heat to form a gas phase and a liquid phase, the gas phase part enters the high-temperature compression stage front demister, and the liquid phase part enters the high-temperature compression stage front demister. The liquid phase enters a low-temperature flash tank, the saturation temperature of the tower kettle liquid in the low-temperature flash tank is reduced again, the gas phase enters a low-temperature compression demister after flash evaporation, the liquid phase enters a spraying pump, and the material entering the spraying pump enters a sprayer after being pressurized; methanol steam demisted by the low-temperature compression stage front demister is compressed by the low-temperature compression stage, the saturation pressure is increased, the methanol steam is overheated and then enters the high-temperature compression demister, and a gas phase of the high-temperature compression stage front demister enters the high-temperature compression stage, is compressed and then converges with liquid of the spray thrower to return to the tower kettle.

The invention relates to a limestone-gypsum wet desulphurization method and system.The method comprises the steps that desulfurized rich slurry is heated through a rich liquid heater and desorbed through a flash desorption device in sequence, obtained flash desorption steam is purified through a purification treatment unit, and desorbed sulfur dioxide gas can be obtained; and treating at least part of the desulfurized lean slurry by a gypsum treatment unit to obtain a gypsum product. By adopting the method disclosed by the invention, the discharge amount of the gypsum can be reduced and the quality of the gypsum can be improved while resource recycling of the sulfur is realized. Besides, the obtained desorbed sulfur dioxide gas can be converted into chemical products through subsequent process treatment, so that the current situation of sulfur resource shortage is relieved.

A rectification integrated device for preparing phase change material from fischer-tropsch wax, which is characterized in that a tower top gas pipe (102) is connected to the top of a tower body (101) and penetrates a tower cavity (110), a preheating and dewatering assembly (3) is arranged on a conveying pipe (202), the preheating and dewatering assembly (3) comprises a flash tank (301), a fixed bin (308) is arranged at the top of the flash tank (301), a negative pressure generating assembly is arranged at the top of the fixed bin (308) and is used for establishing a negative pressure environment in the inner cavity of the flash tank (301), the application discloses a rectification assembly with preheating and dewatering functions, the tower top steam of the tower body itself is used as a heat source, and dewatering is strengthened under negative pressure, so that external energy consumption can be greatly reduced, thereby ensuring the stable operation of the tower body and the purity of the phase change material product, and the device integrates the functions of preheating, dewatering and negative pressure extraction in a single equipment, so that the equipment area and investment cost are reduced.

The application belongs to the technical field of methanol preparation, and particularly relates to a device and a preparation method for preparing methanol by combining carbon dioxide hydrogenation with chemical chain combustion, which comprises a power generation system, an electrolytic cell, a chemical chain combustion reactor, a pure oxygen supplement combustion chamber and a methanol reaction unit. The power generation system is connected with the electrolytic cell. Oxygen generated by electrolysis of the electrolytic cell is connected with the chemical chain combustion reactor through a first pipeline. Oxygen generated by electrolysis of the electrolytic cell is connected with the pure oxygen supplement combustion chamber through a second pipeline. The chemical chain combustion reactor is connected with a raw material pipeline. The top of the chemical chain combustion reactor is connected with the pure oxygen supplement combustion chamber through a third pipeline. The pure oxygen supplement combustion chamber is connected with the methanol reaction unit through a fourth pipeline. Hydrogen generated by electrolysis of the electrolytic cell is connected with the methanol reaction unit through a fifth pipeline. Reaction products are discharged through a sixth pipeline.

The invention discloses a reaction system and a reaction process for preparing propylene carbonate by a urea method, and relates to the technical field of chemistry and chemical engineering. The reaction system comprises a primary reaction system, a secondary reaction system and a final reaction system which are sequentially connected, the primary reaction system comprises a first reaction kettle and a first flash tank, the secondary reaction system comprises a second reaction kettle and a second flash tank, and the final reaction system comprises a third reaction kettle and a third flash tank; a baffle plate is arranged in the first reaction kettle, a spray nozzle is arranged in the second reaction kettle, a rotating plate is arranged in the third reaction kettle, and the rotating plate is coaxially connected with a stirrer in the third reaction kettle. The reaction process comprises the steps of primary reaction, secondary reaction and final reaction. The method can effectively remove ammonia gas generated in the process reaction, realizes continuous production of propylene carbonate, and is high in process yield, simple in equipment, clear in process and beneficial to large-scale production.

The invention discloses a titanium dioxide waste acid concentration system and method, and belongs to the technical field of sulfuric acid process titanium dioxide production or similar waste acid concentration. The system comprises a primary concentration and ferrous separation module and a secondary concentration and ferrous separation module. The primary concentration and ferrous separation module realizes primary concentration and solid-liquid separation of waste acid through an evaporation concentration kettle, a flash tank and a primary diaphragm filter press; and the secondary concentration and ferrous separation module is used for carrying out deep concentration and secondary separation on the waste acid through a scraper evaporator and a secondary diaphragm filter press. The system adopts the technologies of ultrasonic descaling, stepped concentration and solid removal, partition temperature control film evaporation and the like, and is matched with a mirror surface level inner wall scraper evaporator and an adjustable rapping device, so that the problem of scaling blockage in the waste acid concentration process is effectively solved. The method can increase the concentration of waste acid to 60% or above, realizes continuous automatic operation, and has the advantages of low equipment investment, low operation cost, environmental friendliness, high resource recovery rate and the like.

The application belongs to the field of chemical purification, and discloses a method for separating carbon tetrafluoride in nitrogen trifluoride by using a eutectic solvent under pressure and an equipment thereof, which comprises the following steps: (1) increasing the pressure of crude nitrogen trifluoride gas to more than 0.5 MPa; (2) cooling the temperature of the crude gas to below 40 DEG C through a crude gas feeding heat exchanger; (3) reducing the content of carbon tetrafluoride in the crude gas to below 5 ppm by countercurrent contact between the crude gas entering the tower kettle and the eutectic solvent entering the top of the absorption tower through the absorption tower; (4) reducing the content of carbon tetrafluoride in the eutectic solvent to below 1 ppm through two-stage flash tanks; and (5) reducing the temperature of the eutectic solvent to below 30 DEG C through a eutectic solvent discharging heat exchanger and a eutectic solvent cooler, and circulating the eutectic solvent from the bottom of the absorption tower back to the absorption tower. The method can improve the quality of the nitrogen trifluoride product, and the content of carbon tetrafluoride impurities in the nitrogen trifluoride product can be reduced to 5 ppm, and the cost is low.

The application discloses a module for glycol circulation regeneration and a processing method, which comprises glycol rich liquid flash tank skid, glycol lean liquid storage tank skid and glycol heat exchange skid arranged in layers from top to bottom; the glycol rich liquid flash tank skid comprises a glycol rich liquid flash tank and an overhead air cooler; the glycol lean liquid storage tank skid comprises a glycol lean liquid storage tank and an overhead condensate collection tank; the glycol heat exchange skid comprises a glycol regeneration tower, a glycol reboiler, a glycol heat exchanger, a lean glycol cooler, a plurality of glycol injection pumps and a glycol circulation pump, and the glycol regeneration tower penetrates through the module; the glycol circulation regeneration function is realized through reasonable arrangement. The module is compact in arrangement and can meet the operation, maintenance and repair requirements; the module design occupies a small area, and field connection and installation are simple; since the module is prefabricated in a factory, reinstallation operation is carried out on site, field work load is greatly reduced, and the construction period is shortened.

The invention discloses a monoammonium phosphate reaction concentration system and method. The system comprises a first-effect evaporation device, a second-effect evaporation device and a condensing device, the first-effect evaporation device comprises a static mixer, a first-effect circulating pump, a first-effect heater and a first-effect flash tank, the first-effect heater, the static mixer and the first-effect flash tank are sequentially connected, and the bottom of the first-effect flash tank is connected with the first-effect heater through the first-effect circulating pump to achieve circulation; the second-effect evaporation device comprises a second-effect circulating pump, a second-effect heater and a second-effect flash tank, the second-effect heater is connected with the second-effect flash tank, the bottom of the second-effect flash tank is further connected with the second-effect heater through the second-effect circulating pump to achieve circulation, and an outlet of the first-effect circulating pump is further communicated with an inlet of the second-effect circulating pump through a first circulating pipeline; the second-effect heater is connected with the first-effect flash tank to utilize a first-effect gas phase from the first-effect flash tank as a heat source, and the condensing device is connected with the second-effect flash tank. The method can improve the reaction conversion rate.

The utility model relates to the technical field of chlor-alkali chemical industry, and particularly discloses a caustic soda evaporation and concentration system. The system comprises a first-effect falling-film evaporator, a second-effect falling-film evaporator and a third-effect falling-film evaporator which are connected in sequence, and a condensate outlet of a heat exchanger of the third-effect falling-film evaporator is provided with a first flash tank. A second flash tank is arranged between a condensate outlet of the second-effect falling film evaporator heat exchanger and an inlet of the first-effect falling film evaporator heat exchanger, the first-effect falling film evaporator, the second-effect falling film evaporator and the third-effect falling film evaporator are combined, secondary steam generated by the previous stage is used as a heating heat source of the next stage, the steam utilization rate is increased, and the energy consumption is reduced. A flash tank is additionally arranged at a condensate outlet of a heat exchanger of a second-effect falling film evaporator, condensate generated by second-effect is subjected to secondary flash evaporation in a negative-pressure state of second-effect secondary steam and then used for third-effect alkali liquor heat exchange, and latent heat of the condensate is fully utilized.

The invention belongs to the technical field of fluorine-containing polymer production, and particularly relates to a fluorine-containing olefin continuous polymerization system and a working method. The fluorine-containing olefin continuous polymerization system comprises a monomer conveying unit, a solvent conveying unit, a mixer, a reaction kettle, an additive adding unit, a flash tank and a drying tower, wherein the monomer conveying unit and the solvent conveying unit are used for conveying a monomer and a solvent respectively, mixing the monomer and the solvent through the mixer and inputting the mixture into the reaction kettle from the bottom of the reaction kettle; the auxiliary agent adding unit is used for adding an auxiliary agent into the reaction kettle; the flash tank is communicated with the top of the reaction kettle and is used for receiving mother liquor in the reaction kettle, separating unreacted monomers and polymers in the mother liquor and respectively discharging the unreacted monomers and polymers into the monomer conveying unit and the drying tower; and the drying tower is used for drying and separating the polymer to obtain a product and a solvent. According to the fluorine-containing olefin continuous polymerization system disclosed by the invention, full-liquid-filled kettle type reaction is adopted, and no gas phase space exists in the reaction kettle, so that the accumulation of monomers is reduced, and the explosion risk is sharply reduced. During continuous reaction, the concentrations of fluorine-containing olefin, an initiator and the like in the reaction are fixed, and the reaction temperature, the reaction pressure and the retention time of materials are also fixed, so that the product quality of the polymer is constant and controllable.

The application provides a gas-liquid separation system and an electrolysis system. The gas-liquid separation system comprises a hydrogen-alkali vertical gas-liquid separator, an oxygen-alkali vertical gas-liquid separator, a first alkali preparation tank and a second alkali preparation tank. The hydrogen-alkali vertical gas-liquid separator and the oxygen-alkali vertical gas-liquid separator are both provided with a gas-liquid separation structure, a gas washing structure, a gas cooling structure and a gas-water separation structure from bottom to top. The pressure value in the first alkali preparation tank is lower than the pressure value in the hydrogen-alkali vertical gas-liquid separator, so that the alkali liquor flowing out of the first liquid outlet is flashed. The pressure value in the second alkali preparation tank is lower than the pressure value in the oxygen-alkali vertical gas-liquid separator, so that the alkali liquor flowing out of the second liquid outlet is flashed. In the application, the gas-liquid separation structure, the gas washing structure, the gas cooling structure and the gas-water separation structure are integrated into the corresponding vertical gas-liquid separator, and the flash evaporation is performed by using the alkali preparation tank without setting an additional flash evaporation structure, so that the overall size of the gas-liquid separation system can be effectively reduced.

The invention discloses a device for preparing oxamide by a continuous method and application of the device in preparation of spherical high-purity oxamide. Belongs to the technical field of oxamide preparation devices. The device comprises a raw material feeding and mixing area, a reaction area, a separation and purification area and a recovery area. The reaction zone comprises a series tubular reactor, a divergent pressure-stabilizing current equalizer and a parallel tubular reactor, and the Y-shaped mixer, the series tubular reactor and the divergent pressure-stabilizing current equalizer are sequentially connected through pipelines; the divergent pressure-stabilizing flow equalizer comprises a divergent pipe body and a flow equalizing grating plate, the flow equalizing grating plate is arranged in the divergent pipe body, and the cross section of the divergent pipe body is gradually increased from the feed port to the discharge port. The device for preparing oxamide through the continuous method has the beneficial effects that the structure is simple, the cost is low, spherical high-purity oxamide can be continuously and efficiently produced, and the device has wide application prospects and high economic value.