792 results about "Reboiler" patented technology

The utility model relates to the technical field of heat pump rectification, and particularly discloses a heat pump rectification system which comprises a rectification tower; the tower top gas liquefaction system comprises a compressor connected with a gas phase at the top of the rectifying tower, and a reboiler, a throttling device, a condenser and a flow divider which are sequentially connected with the compressor; liquid phase connection at the bottom of the rectifying tower is communicated with the reboiler, the tower bottom reboiling system comprises an auxiliary reboiler and a flash evaporator which are sequentially communicated with the reboiler, and the flash evaporator is communicated to the rectifying tower; and the gas phase at the top of the rectifying tower is heated by the compressor and then enters the reboiler to exchange heat with the liquid phase at the bottom of the rectifying tower, so that the rectifying energy consumption can be reduced, and the energy-saving effect is achieved.

The invention relates to the technical field of heat exchange equipment, in particular to baffle plate welding and fixing equipment in a kettle type reboiler with a multi-anti-vibration structure, which comprises a workbench, a controller, fixing seats and rails, the controller is mounted at the top end of the workbench, and the two ends of the two rails are respectively provided with a group of fixing seats; the bottom ends of the fixing seat and the rail are connected with the top end of the workbench, the baffle plate frame welding device further comprises a supporting assembly and a welding assembly, the supporting assembly is installed at the top end of the workbench, the baffle plate frame can only rotate on the supporting assembly, the welding assembly is arranged at the top end of the workbench, and the welding assembly is used for welding the baffle plate frame and the square block; when the device is used, the supporting pipe penetrates through the multiple sets of baffle plates and is fixedly connected with a pipe plate to form a baffle plate frame, then the baffle plate frame is placed on the supporting assembly, and then the welding assembly is controlled by the controller to weld square blocks on each set of baffle plates, so that the machining efficiency is improved, and the labor intensity of workers is relieved.

The invention relates to the field of heavy water production, and discloses a compression cycle heat supply heavy water rectification process which comprises the following steps: 1, carrying out primary rectification on feed water; 2, condensing tower top steam by a first-stage cooler to obtain tower top produced liquid, enabling one part of the produced liquid to flow back to a first-stage rectifying tower, discharging the other part of the produced liquid, pressurizing and heating a working medium heated by the first-stage cooler by a compressor, and feeding the working medium into a first-stage reboiler; 3, feeding one part of deuterium-enriched water of the tower kettle into a first-stage reboiler, boiling, returning to the bottom of the rectifying tower, taking the rest part as feed water for next-stage rectification, and returning a working medium cooled by the first-stage reboiler into a first-stage cooler through a first-stage expansion valve to be heated and evaporated; and 4, performing N-stage rectification and purification until the heavy water meets the purity requirement. By utilizing the characteristics that the boiling difference between water and heavy water is extremely small and the condensation heat of the tower kettle is equivalent to the heat source required by the tower kettle, the condensation heat of tower top steam is transferred to the tower kettle through the circulating working medium, the energy consumption is greatly reduced, and a large amount of heat sources can be provided for the system by a small amount of power consumption of the compressor.

The invention discloses a low-energy-consumption skid-mounted integrated NMP high-efficiency rectification device, and particularly relates to the technical field of chemical engineering, the low-energy-consumption skid-mounted integrated NMP high-efficiency rectification device comprises a mounting skid seat, a secondary dehydration tower, a primary dehydration tower, a primary rectification tower, a secondary rectification tower and a reboiler; the secondary dehydrating tower is detachably connected with the mounting prying seat through a bolt A; the primary dehydrating tower is detachably connected with the mounting prying seat through a bolt B; the primary rectifying tower is detachably connected with the mounting prying seat through a bolt C; the secondary rectifying tower is detachably connected with the mounting prying seat; the reboiler is communicated with the secondary dehydrating tower; the device is reasonable in structural design, and on the basis of the core principle of NMP rectification recovery, by optimizing the rectification process design, efficiently utilizing heat energy, only needing single heating and greatly reducing the heating times of waste liquid, the energy loss is fundamentally reduced, and the energy consumption is obviously saved; meanwhile, the overall height of the device is controlled to be less than ten meters, the requirement for the site space is greatly reduced, and the device can flexibly adapt to the land use situations of more enterprises.

The invention provides a sewage steam stripping thermal self-circulation system which is characterized in that a first heat exchanger receives acidic water and is connected with a hot feed inlet of a steam stripping tower through a second heat exchanger, a first gas outlet of the steam stripping tower outputs ammonia gas through the second heat exchanger, and a second gas outlet outputs hydrogen sulfide; a purified water outlet of the stripping tower is respectively connected with a steam reboiler and a purified water inlet of a steam generator, a liquid outlet of the steam reboiler is connected with a condensed water inlet of the steam generator, a purified water outlet of the steam generator outputs purified water through a first heat exchanger, and a steam outlet and a condensed water outlet of the steam generator are connected with a steam compressor. And a steam outlet of the steam compressor is connected with a steam inlet of the steam reboiler. The problem of heat waste of purified water and condensed water can be solved, full utilization of medium-high temperature waste heat is achieved, the heat exchange process of raw material water is improved, the to-be-cooled temperature of the purified water is reduced, and energy loss is reduced.

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 invention discloses a dry reboiler for an isotope rectifying tower device. The dry reboiler comprises a porous thin-wall structure and a heating supporting part, wherein the heating supporting part comprises a liquid collecting surface, the porous thin-wall structure is connected with the heating supporting part and located above the liquid collecting surface of the heating supporting part, and the porous thin-wall structure is configured to provide a capillary surface for liquid to flow; liquid on the liquid collecting surface is sucked into the thin wall of the porous thin-wall structure from bottom to top through capillary force, so that gas and liquid flowing in the porous thin-wall structure are subjected to heat and mass transfer; the heating supporting part is provided with a heating rod, the heating supporting part is further configured to transfer heat to the liquid collecting surface of the heating supporting part and the porous thin-wall structure through the heating rod, and the dry type reboiler can reduce the liquid holdup and has the functions of quickly responding to load change, being compact in structure and the like, so that the production requirements of high efficiency, energy conservation and stability are met.

The system comprises an absorption tower, a grading flash tank, a desorption tower, a buffer tank and an MVR (mechanical vapor recompression) compressor, a liquid outlet of the absorption tower is connected with the grading flash tank, a gas outlet of a first-stage flash cavity of the grading flash tank is connected with a carbon dioxide recovery unit, gas outlets of other flash cavities are connected with a gas inlet of the absorption tower, and a gas inlet of the absorption tower is connected with a gas outlet of the desorption tower. A liquid outlet of the grading flash tank is connected with a desorption tower, and a regenerated gas outlet of the desorption tower is connected with a buffer tank through an MVR compressor, so that regenerated gas is pressurized and then conveyed into the buffer tank; a gas outlet of the buffer tank is connected with the carbon dioxide recovery unit, and a steam outlet of the buffer tank is respectively connected with the grading flash tank and a reboiler of the desorption tower. The regeneration energy consumption can be reduced, and the equipment size can be reduced.

The utility model relates to the technical field of hydrochloric acid desorption, in particular to a hydrochloric acid desorption device which comprises a hydrochloric acid desorption tower, and the top of the hydrochloric acid desorption tower is sequentially communicated with a primary condensing device, a secondary condensing device, a freezing device, a demister and a hydrogen chloride buffer tank; one side wall of the hydrochloric acid desorption tower is communicated with a hydrochloric acid storage tank; the side wall of the hydrochloric acid desorption tower is also communicated with a calcium chloride solution storage tank; a bottom liquid outlet of the hydrochloric acid desorption tower is communicated with a first inlet of the thermosyphon reboiler, the thermosyphon reboiler is provided with a first outlet and a second outlet, the first outlet is communicated with a liquid inlet of the hydrochloric acid desorption tower, and the second outlet is sequentially communicated with the multi-effect evaporation device and the flash separation tank; and the flash separation tank is respectively communicated with a calcium chloride solution storage tank and a second inlet of the thermosyphon type reboiler. According to the utility model, the equipment investment is reduced, the concentration efficiency of the calcium chloride solution is improved, the energy consumption is reduced, and calcium chloride is prevented from flowing back into the desorption tower to cause blockage.

The utility model relates to an energy-saving production device for preparing methyl tert-butyl ether by an isobutane dehydrogenation method. A raw material gasifier is arranged between the catalytic distillation tower feeding and discharging heat exchanger and the catalytic distillation tower, a temperature sensor is arranged on a feeding pipeline from the raw material gasifier to the catalytic distillation tower, a gas phase at the top of the catalytic distillation tower is divided into two pipelines, a compressor is additionally arranged on one pipeline, and an automatic flow regulating valve is additionally arranged on the other pipeline; a cold-side material outlet of the distillation tower feeding and discharging heat exchanger is connected with a cold-side material inlet of the raw material gasifier, a cold-side material outlet of the raw material gasifier is connected with a feeding hole in the middle lower part of the catalytic distillation tower, and a tower top discharging pipeline of the catalytic distillation tower is respectively connected with an inlet of the compressor and a hot-side material inlet of the condenser; an outlet pipeline of the compressor is connected with a hot measuring material inlet of the raw material gasifier, and a hot measuring material outlet of the raw material gasifier is connected with a liquid inlet of the return tank. According to the utility model, a heat pump technology is adopted, so that the heating power of the tower kettle reboiler is reduced, and the steam consumption is reduced; and the method is more economical.

The utility model relates to a device for removing ammonia nitrogen in high-salinity wastewater. The device comprises a buffer tank, a raw material conveying pump, a raw material preheater, a concentration tower I, a concentration tower II and a concentration tower III which are connected in sequence, tower kettles of the concentration tower I, the concentration tower II and the concentration tower III are respectively connected with corresponding reboilers and tower kettle liquid delivery pumps, and tower tops of the concentration tower I, the concentration tower II and the concentration tower III are respectively connected with corresponding tower top liquid reflux tanks, tower top reflux pumps and tower top coolers; and the tower top liquid return tanks of the concentration tower II and the concentration tower III are respectively connected with corresponding deep coolers. According to the device, three-tower triple-effect differential pressure thermal coupling rectification is adopted, ammonia nitrogen in the high-salinity wastewater is effectively removed, all effective components are recycled, purified water at the top of each tower can be used for preparing 20 (wt)% of ammonia water, and concentrated liquid at the bottom of the tower can be used for refining saline water in the chlor-alkali chemical industry; the tower top steam of the concentration tower I can be used as a heat source of the concentration tower II, and the tower top steam of the concentration tower II can be used as a heat source of the concentration tower III, so that the steam consumption is greatly reduced.

The invention belongs to but not limited to the technical field of rectification, and discloses a crude methanol five-tower multi-effect rectification energy-saving process and device. A crude methanol raw material is preheated and then enters a pre-tower for rectification, and steam at the top of the pre-tower is used as a heat source of a negative pressure tower reboiler; the negative-pressure tower, the pressurizing tower, the atmospheric tower and the recovery tower sequentially perform rectification separation, and steam at the top of each tower is used as a heat source or reflux of a downstream reboiler according to process requirements; a heat exchange medium II generated in the methanol conversion section directly supplies heat to the pre-tower reboiler; a heat exchange medium I generated in the methanol conversion section supplies heat to the atmospheric tower reboiler after meeting the waste heat requirement of the pre-tower reboiler; when the methanol conversion section can provide residual heat, the residual heat is preferentially supplied to the negative pressure tower and / or the recovery tower reboiler so as to reduce the external steam consumption. By reasonably utilizing the heat of the conversion section, the waste heat of the equipment and the heat of the tower are subjected to gradient utilization, a large amount of heat is recovered, and the steam energy consumption of the system is greatly reduced.

The invention provides a post-combustion carbon capture mixed control system and method, the system comprises a post-combustion carbon capture device and a control unit, the post-combustion carbon capture device comprises an absorption tower, a desorption tower, a lean and rich liquid heat exchanger and a reboiler, and the control unit comprises a distributed control module, a centralized control module and a ratio control module; the buffer tank stores and stabilizes the lean solution to enter the absorption tower; the reboiler heat source adjusting valve adjusts the steam supply amount according to the first optimization set value; the distributed control module is used for carrying out local stabilization control on the state of the lean solution in the buffer tank; the centralized control module performs optimization control on the overall performance of the post-combustion carbon capture device according to a pre-established target function to obtain a first optimization set value and a second optimization set value; and the ratio control module adjusts the flow ratio control of the lean solution and the flue gas according to a second optimization set value of the centralized control module, so that the stability of carbon capture control after combustion is improved.

The invention belongs to the technical field of heat pump rectification, and particularly relates to a double-effect heat pump rectification system which comprises a first-effect rectification tower feeding pump connected with a preheater, the preheater is connected with a first-effect rectification tower, the first-effect rectification tower is connected with a gas-liquid separator through a screw compressor, and the gas-liquid separator is connected with a tail gas condenser through a second-effect falling film reboiler. The second-effect falling film reboiler is connected with a first-effect reflux discharge pump through a first-effect reflux tank, and the first-effect reflux discharge pump is connected with the preheater; the first-effect rectifying tower is respectively connected with a first-effect falling film reboiler and a first-effect falling film circulating pump; the first-effect rectifying tower is connected with a second-effect rectifying tower through a first-effect tower kettle discharging pump; the first-effect falling film reboiler is connected with a second-effect reflux discharge pump through a second-effect reflux tank; the second-effect falling film reboiler is connected with a second-effect falling film circulating pump and a second-effect rectifying tower, the second-effect falling film reboiler is connected with a second-effect rectifying tower kettle discharging pump through the second-effect rectifying tower, and the second-effect rectifying tower is connected with the first-effect falling film reboiler. According to the invention, double-effect rectification and heat pump rectification are successfully combined, and the cost is low.

A method for heat integration between a chemical synthesis plant that runs an exothermic reaction and (ii) and a partner plant that generates a working fluid such as steam (e.g., runs a power cycle). The present disclosure describes both internal and external heat integration. Internal heat integration may provide heat from the exothermic reaction (e.g., from methanol synthesis) to a reboiler associated with a distillation column of the chemical synthesis plant. External heat integration may use heat from the exothermic reaction to preheat a condensed water stream (which stream is downstream from the turbine and condenser of the power cycle). Such reduces the need for bleed off the turbine to preheat condensed water as part of the power cycle. A bleed off the turbine provides heat to the reboiler associated with the distillation column of the chemical synthesis plant. Heat integration provides overall improved energy use within both plants.

The invention provides a coarse methanol five-tower thermal coupling refining process and a refining device.The device comprises a pre-rectifying tower, a normal-pressure rectifying tower, a medium-pressure rectifying tower, a first pressurized rectifying tower and a second pressurized rectifying tower which are sequentially connected, the top of the pre-rectifying tower is connected with a first normal-pressure tower reboiler, and the top of the medium-pressure rectifying tower is connected with a pre-tower reboiler; the top of the pressurized rectifying tower I is connected with a medium-pressure tower reboiler and a pressurized tower II reboiler; the top of the pressurized rectifying tower II is connected with an atmospheric tower reboiler II through a top extraction pipeline of the pressurized tower II; tower top steam of the first pressurized rectifying tower provides heat for the medium-pressure rectifying tower and the second pressurized rectifying tower, tower top steam of the medium-pressure rectifying tower provides heat for the pre-rectifying tower, tower top steam of the pre-rectifying tower and the second pressurized rectifying tower provides heat for the normal-pressure rectifying tower, and heat of the tower tops of all the rectifying towers is fully utilized; through the application, the unit consumption of the methanol rectification process can be reduced from 1.2 t steam / t refined alcohol to 0.50-0.60 t steam / t refined alcohol, so that the energy consumption is greatly reduced.

The utility model relates to the technical field of caprolactam, and particularly provides a high-temperature ammoximation reaction heat utilization system, which comprises an ammoximation reaction kettle and an evaporation tower, a circulating pipeline and a circulating pump are arranged at the lower part of the reaction kettle, an evaporation tower reboiler is arranged in the evaporation tower, an outlet of the circulating pump is connected with an inlet of the evaporation tower reboiler, and the circulating pump is connected with the evaporation tower reboiler. An outlet of the evaporation tower reboiler is connected to a material return port of the ammoximation reaction kettle after passing through a condenser; a steam outlet is formed in the top of the evaporation tower and is connected to a gas pipeline. On the basis of heterogeneous ammoximation, the temperature of a reaction system is increased, high-pressure water vapor is directly generated by reaction heat, the water vapor is used for supplying heat to other sections of caprolactam, the use amount of ammoximation circulating water is reduced, the overall energy consumption of caprolactam is reduced, and the cost is reduced.

Disclosed in the present disclosure are a rapid start-stop carbon capture system suitable for a peak-shaving unit and a rapid start-stop method. The rapid start-stop carbon capture system suitable for a peak-shaving unit comprises an absorption tower, a desorption tower, a heat exchanger and a carbon capture treatment assembly, wherein the heat exchanger is connected between the absorption tower and the desorption tower, and the carbon capture treatment assembly is connected to a carbon dioxide outlet of the desorption tower; and the absorption tower has a first electric heating assembly, and the desorption tower has a second electric heating assembly and a reboiler, the first electric heating assembly being configured to heat a first working medium in the absorption tower, and the second electric heating assembly and the reboiler being configured to heat a second working medium in the desorption tower.

The invention relates to the technical field of carbon capture regulation and control, and discloses a carbon capture solvent regeneration energy consumption real-time regulation and control system and method based on AI optimization. The system comprises a solvent regeneration environment monitoring unit which is used for collecting multi-dimensional operation parameters such as reboiler steam pressure, solvent circulation flow, lean and rich liquid heat exchange temperature difference and tower top gas phase component concentration in a regeneration tower in real time; the dynamic energy consumption feature extraction unit is used for extracting an implicit energy consumption feature vector through a deep space-time convolutional neural network and generating an energy efficiency evaluation index; the regeneration strategy optimization decision-making unit is used for generating a steam valve opening degree adjusting strategy and a solvent circulating pump frequency control strategy through online iteration by adopting a reinforcement learning framework; the execution feedback control unit is used for converting the strategy into a control signal and acquiring execution feedback data; and the closed-loop verification module is used for comparing the actual steam consumption deviation with the theoretical steam consumption deviation, and triggering feature re-extraction when the deviation exceeds a threshold value. The system realizes intelligent real-time regulation and control of solvent regeneration energy consumption.

The invention discloses a double-tower rectification method and a double-tower rectification system, and the method comprises the following steps: introducing a material to be separated into a first rectification tower through the middle part of the first rectification tower, and carrying out first rectification treatment to form a first rectification tower top product and a first rectification tower bottom product, the mass content of light key components in the top product of the first rectifying tower is 5%-10%; after the first rectifying tower top product passes through a second reboiler to release heat, the first rectifying tower top product enters a second rectifying tower from the middle of the second rectifying tower through a transmission channel from the top of the first rectifying tower, and second rectifying treatment is performed to form a second rectifying tower top product and a second rectifying tower bottom product. According to the method, the energy consumption can be reduced while an excellent separation result is realized.

The invention discloses a carbon capture system and method for recycling reaction heat of an absorption tower to assist regeneration, the system comprises a carbon capture power plant and a heat pump system, and the heat pump system is integrated with the carbon capture power plant. The system comprises a power plant and a carbon capture unit, wherein the carbon capture unit comprises an absorption tower and a desorption tower connected with the absorption tower; the heat pump system is used for recovering reaction heat of the absorption tower and providing medium-high temperature steam for the desorption tower, and additionally needed steam is extracted from a steam turbine of a power plant. The heat pump system and the carbon dioxide capture power plant are integrated, low-grade reaction heat in an absorption tower is effectively recovered, the temperature of medium-high-temperature steam needed by a reboiler of a desorption tower is increased, dependence on steam extraction of a steam turbine of the power plant is remarkably reduced, and therefore the energy consumption and the operation cost of the system are reduced.

This application discloses an acetaldehyde recovery device and method in the production of 1,3-butanediol, belonging to the field of fine chemicals. The device includes: a feed pump, a preheater, a distillation column, a falling film reboiler, a bottom circulating pump, a bottom cooler, a top primary condenser, a reflux ratio distributor, a top secondary condenser, a top product tank, a top transfer tank, a bottom product tank, a bottom transfer tank, a vacuum condenser, a vacuum pump inlet separator, a high vacuum unit, and a vacuum pump outlet separator. The horizontal condenser is directly installed at the top of the distillation column, giving it advantages such as simple structure, convenient operation, low pipeline loss, and high vacuum. A method for acetaldehyde recovery in the production of 1,3-butanediol using this device is also disclosed. Compared to existing technologies, this invention uses falling film evaporation combined with vacuum deep cooling, which avoids the thermal decomposition of 3-hydroxybutyraldehyde and achieves low-temperature, high-efficiency acetaldehyde recovery. It is suitable for continuous production.

A distillation method includes supplying a batch type distillation column with a liquid that is a process fluid; increasing pressure and temperature of a fluid, with a compressor and supplying the fluid to a reboiler; exchanging heat in the reboiler between the liquid, which has been supplied to the distillation column, and the fluid, which has been increased in pressure and temperature, to heat the liquid and acquire overhead vapor and to condense the fluid; delivering the overhead vapor to a condenser and condensing the overhead vapor into a condensate through heat exchange, removing the condensate; removing residual liquid from the distillation column; and regulating pressure of the distillation column to distill the liquid with heat generated by a heat pump operated over a narrower temperature rising range in the pressure-temperature increasing step.

The invention relates to the technical field of neon isotope separation, and discloses a neon isotope separation system and method.The neon isotope separation system comprises a neon gas tank, a supercharger, a first-stage heat exchanger, a second-stage heat exchanger, a mixing refrigerator and a multi-stage rectifying tower, and cold neon discharged from the top of the rectifying tower except the first-stage rectifying tower is subjected to heat exchange through the second-stage heat exchanger and the first-stage heat exchanger and then flows back to the supercharger, and the cold neon is effectively used as a refrigerant to cool neon. And then part of neon cooled by the first-stage heat exchanger is shunted into the reboiler of the multi-stage rectifying tower, the temperature of the neon in the rectifying tower is adjusted, separation of 20Ne and 22Ne is promoted, neon branches in the reboiler converge with neon branches cooled by the second-stage heat exchanger, heat in neon at different stages can be fully utilized, and energy consumption is reduced. The neon cooled by the first-stage heat exchanger is used for heat exchange and temperature adjustment of the neon in the rectifying tower, the temperature difference between the neon and the neon is not too large, the temperature of the neon in the rectifying tower can be effectively and finely adjusted, and then separation of isotopes 20Ne and 22Ne at the low temperature is promoted.

To provide a distillation apparatus capable of obtaining high distillation treatment efficiently while achieving energy saving, decarbonization and CO2 reduction.SOLUTION: The distillation apparatus 1 comprises a heat pump type steam generating part 20 for generating heated steam by heating reboiler drain water as drain water of a reboiler circulation water for heating a reboiler 13 by a heat source of condenser drain water as drain water of a column bottom part 11 and taking out a low boiling point component from a column top part 12 as a distillate and taking out a high boiling point component from the column bottom part 11 as a drain water.SELECTED DRAWING: Figure 1

The invention discloses an MDEA solution thermal regeneration and hydrogen sulfide analysis system and process method, and belongs to the technical field of gas purification and chemical separation. The system comprises a regeneration tower, a kettle type reboiler, a condensate tank and a gas phase balance pipeline, an oil collector is arranged at the bottom of the regeneration tower, and the shell pass liquid level of a kettle type reboiler is controlled by LT2 to be always higher than the top of a heat exchange tube bundle, so that full-immersion corrosion prevention is realized; steam condensate enters the condensate tank through the first condensate outlet pipeline, and the pressure in the condensate tank is synchronous with that of the steam inlet pipeline through the gas phase balance pipeline, so that the condensate is automatically discharged without a pump; and when the gas phase outlet temperature TE2 is smaller than or equal to 125 DEG C and the steam pressure PT1 after pressure reduction is larger than 0.4 MPa, steam is cut off in an interlocking mode, and MDEA thermal decomposition is prevented. The service life, the operation safety and the operation reliability of equipment are remarkably improved.

The utility model relates to the field of coal ethanol, disclose a kind of rectifying device of removing isopropyl alcohol in coal ethanol, including ethanol refining A tower and ethanol refining B tower, the ethanol refining A tower is provided with A tower reflux tank and A tower reboiler, the ethanol refining B tower is provided with B tower condenser, B tower reflux tank and condensing / reboiler.The utility model in, high-purity ethanol is taken from tower side line, methanol and other light components are removed from tower top, heavy components such as isopropyl alcohol are removed from tower kettle, through A, B refining tower collaborative operation, utilize the condensation latent heat of A tower top steam to heat B tower reboiler, energy consumption reduction exceeds 40%, solve the problem that isopropyl alcohol with similar boiling point in coal ethanol is difficult to separate efficiently, significantly improve the energy economy of whole process.

The application discloses an energy-saving micro-rectifying tower air separation device, which comprises a rectifying tower, a heat closed loop system, a molecular sieve tank and a gas storage bottle group, the diameter of the rectifying tower is less than or equal to 80 mm, the rectifying tower comprises a condenser section at the top of the rectifying tower, a filler section at the middle of the rectifying tower and a reboiler section at the bottom of the rectifying tower, and the filler section comprises fillers arranged in an inner layer, guide plates arranged in an outer layer and grooves arranged on an inner wall. The application also discloses an energy-saving micro-rectifying tower air separation method. The method and the device are suitable for the fields of emergency medical treatment, vehicle-mounted gas production and distributed energy, and provide a high-energy-efficiency and high-reliability solution for micro-rectifying tower air separation devices.

The present application belongs to the field of hydrochloric acid concentration equipment, and particularly relates to a chlorinated polyethylene production process by-product hydrochloric acid concentration system, which comprises a resolving tower and a condensing section dilute hydrochloric acid input tank, the condensing section dilute hydrochloric acid input tank is connected with an absorption tank and a dilute hydrochloric acid buffer tank, the output end of the dilute hydrochloric acid buffer tank is connected with the liquid input end of the resolving tower, the gas input end of the resolving tower is connected with a reboiler, the gas output end of the resolving tower is connected with the absorption tank, and the output end of the absorption tank is connected with a concentrated hydrochloric acid storage tank. The present application divides the condensed dilute hydrochloric acid generated in the condensing section of the chlorinated polyethylene production process into three parts, reduces the types of system raw materials, reduces the difficulty of material preparation, increases the concentration of dilute hydrochloric acid through the resolving formed hydrogen chloride, improves the concentration of hydrochloric acid, and improves the economic value of the product.

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.