1151 results about "Reboiler" patented technology

The invention discloses a dynamic intelligent control method and system for improving the efficiency of a rectifying tower, particularly relates to the technical field of chemical process control, and is used for solving the technical defect that an operation variable is mismatched with a physical state due to the fact that an existing distributed control system cannot recognize a hidden degradation state of equipment. The method comprises the following steps: acquiring temperature gradient distribution of each tower plate of a rectifying tower, thermal load of a reboiler and tower top condensation load parameters in real time, calculating a mass transfer efficiency offset by combining the temperature gradient distribution to generate a scaling trend index, and synchronously calculating a local entropy yield based on the thermal load and the condensation load to generate a thermodynamic irreversibility index. When the double indexes exceed a preset threshold value, it is judged that a recessive degradation state is entered, then a backflow ratio correction coefficient is reversely derived through a dynamic correlation model, and the correction coefficient is input into a distributed control system to dynamically adjust backflow ratio operation parameters; the product purity is maintained, the tower plate scaling process is obviously delayed, and long-term efficient operation of the rectifying tower is guaranteed.

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 utility model discloses a heat source optimizing device for a reboiler of a methanol pre-rectifying tower, which comprises the pre-rectifying tower and the reboiler, and is characterized in that a branch pipeline is separated from the crude methanol discharge of a tower kettle and is connected with a negative pressure flash tank, and the crude methanol in the negative pressure flash tank is subjected to gas-liquid separation through flash evaporation; the bottom of the negative-pressure flash tank is connected with a methanol circulating pump, and a liquid-phase material is conveyed to a first heat exchanger at the top of the tower and returns to the negative-pressure flash tank after exchanging heat with steam at the top of the tower; a gas-phase material in the negative-pressure flash tank enters a compressor, is compressed and heated and then returns to the tower kettle of the pre-rectifying tower; according to the utility model, the process is improved by combining flash evaporation of a tower kettle discharge part with heat pump rectification, and meanwhile, the flash evaporation liquid is recycled to recycle steam heat at the top of the tower, so that the steam consumption of a reboiler of the methanol pre-rectifying tower and the use amount of circulating water at the top of the tower are effectively reduced, meanwhile, the reboiler does not need to be added, and the compression ratio of a heat pump compressor can be reduced.

The invention relates to the field of heavy water production, and discloses an energy-saving rectification heavy water separation process which comprises the following steps: (1) heating feed water, and carrying out primary rectification; (2) compressing steam at the top of the first-stage rectifying tower, then supplying heat to a first reboiler, performing heat exchange condensation on the compressed steam to form tower top produced liquid for first-stage rectification, enabling one part of the tower top produced liquid to flow back to the first-stage rectifying tower, and discharging the other part of the tower top produced liquid as first-stage rectification distillate; (3) a stripping section base solution of the first-stage rectifying tower flows into a first reboiler, and a part of the stripping section base solution is boiled to form rising steam; the rest part enters a tower kettle and is extracted as heavy water or used as feeding water for next-stage rectification; and (4) carrying out N-stage rectification and purification until the heavy water meets the purity requirement. According to the scheme, the boiling difference between water and heavy water is extremely small, tower top condensation heat is equivalent to a heat source required by a tower kettle, tower top steam is used for providing heat for the tower kettle, latent heat of steam is fully utilized, energy consumption is greatly reduced, and a large number of heat sources can be obtained with a small amount of power consumption.

The invention discloses a storage medium, and an optimization method, device and equipment for a multi-effect rectification process flow. The method comprises the following steps: constructing a mechanism model comprising each rectification tower in a multi-effect rectification system; respectively constructing a first correlation function and a second correlation function; generating a data set of a preset group number of process parameters; the data set serves as input, and the reboiler thermal load of the highest-pressure rectifying tower is obtained through mechanism model calculation and serves as theoretical output; taking the data set of the process parameters and theoretical output as modeling data, and generating a prediction model capable of predicting the thermal load of the reboiler of the highest-pressure rectifying tower according to the process parameters through deep learning; and obtaining predicted parameter values of the controllable process parameters when the maximum pressure rectifying tower reboiler has the minimum energy consumption through the prediction model. According to the method, the number of process parameters participating in calculation and the solving difficulty in subsequent optimization calculation can be greatly reduced, and the calculation efficiency of obtaining the optimal solution can be effectively improved.

Disclosed herein are systems and embodiments for improving energy efficiency of a chemical separations plant through heat integration. Heat integration may provide heating loops between distillation columns and / or integrated electric heating components configured to supply heat to reboilers in the chemical separations plant. Heat integration may use heat from an associated chemical synthesis plant configured to carry out an exothermic reaction (e.g., production of methanol from CO2 and H2). Such integrated process designs allow for the use of “low-grade” heat, thereby improving energy efficiency. Furthermore, such integrated process designs allow for electrification of exemplary chemical separations plants, replacing the use of steam as a heating medium with more energy efficient and carbon-emission neutral, electrical methods.

The invention provides an NMP waste liquid rectification system and process for a lithium battery, and relates to the technical field of NMP waste liquid treatment. The rectification system comprises a dehydrating tower and a product tower which are connected in series, the dehydrating tower is connected with the raw material tank, a condenser 1 is arranged at the top of the dehydrating tower, a reboiler 1 is arranged at the bottom of the dehydrating tower, and the bottom of the dehydrating tower is connected with the product tower; a condenser 2 is connected to the top of the product tower, a reboiler 2 is arranged at the bottom of the product tower, a concentrator is connected to the bottom of the product tower, and a kettle residue discharge outlet is formed in the bottom of the concentrator; a condenser 3 is arranged at a side line extraction opening of the product tower and is connected with a finished product storage tank; and a plurality of layers of tower plates are arranged in the dehydrating tower and the product tower, and are filled with structured packing. The preparation process comprises the following steps: dehydrating and removing amine, extracting a main product from a side line, and recycling a high-boiling residue. According to the invention, double towers are used together, and the product is extracted from a side line and has high quality; and more heat sources are saved, the production cost is low, and operation is easy and safe.

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 discloses a carbon capture system based on heat pump heating flash evaporation barren liquor and an operation method of the carbon capture system, and belongs to the field of absorption carbon capture and waste heat utilization. The system comprises an absorption carbon capture unit, a heat pump unit, a flue gas flow channel and a hot water supply circulation flow channel, the absorption carbon capture unit is used for capturing CO2 gas in flue gas, and the heat pump unit is used for recovering flue gas waste heat of the power plant and outputting medium-temperature waste heat to the flash tank to increase the flash steam amount; the flue gas runner is used for introducing high-temperature flue gas into a flue gas inlet in the bottom of the absorption tower after the high-temperature flue gas is sequentially used for heating the generator and the evaporator; and the heat supply circulating water flow channel is used for transferring heat output by the heat pump unit to the flash tank. The heat pump is used for converting the low-temperature waste heat of the flue gas into the latent heat of the steam, the demand quantity of the reboiler for the steam is reduced, the overall energy consumption of a power plant is reduced, and an energy-saving and efficient flue gas trapping technology is provided.

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 discloses a carbon capture system which comprises an absorption tower, a barren and rich liquid heat exchanger, a desorption tower, a rich liquid flow channel, a barren liquid flow channel and a reboiler, the absorption tower comprises a shell, and the shell is provided with a flue gas outlet, a rich liquid outlet, an absorption liquid inlet and a flue gas inlet; the lean-rich liquid heat exchanger comprises a first flow channel and a second flow channel, the first flow channel is provided with a first inlet and a first outlet, the second flow channel is provided with a second inlet and a second outlet, the desorption tower comprises a cylinder and a heat exchange device arranged in the cylinder, and the cylinder is provided with a carbon dioxide gas outlet, a rich liquid inlet and a lean liquid outlet. The barren liquor outlet is sequentially connected with the reboiler, the heat exchange device, the second flow channel and the absorption liquid inlet through the barren liquor flow channel, the barren liquor heated by the reboiler can perform primary heat exchange with the rich liquor flowing through the heat exchange device, then performs secondary heat exchange with the rich liquor in the first flow channel when passing through the barren liquor and rich liquor heat exchanger, and then returns to the absorption tower. The regeneration energy consumption of the absorbent can be efficiently reduced.

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 utility model discloses a heat energy utilization system of a C3 and C4 mixed dehydrogenation device, and relates to the technical field of heat energy utilization. According to the utility model, heat generated by a heat pump compressor is respectively used as a heat source of materials extracted from the side lines of a propane tower reboiler and a C3 and C4 separation tower A, heat of an aromatic solvent pipe system is used as a heat source of the reboiler of the C3 and C4 separation tower A, and heat of materials at the bottom of a C3 and C4 separation tower B is used as a heat source to exchange heat with materials at the inlet of the C3 and C4 separation tower A; surplus heat of the dehydrogenation device is fully utilized, steam consumption is reduced, and the purpose of saving energy is achieved.

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 invention relates to the technical field of glycerin distillation, in particular to a glycerin distillation device with a heat energy recycling function. The device comprises a distillation tower, a condenser, a reflux tank and a compression mechanism connected with the reflux tank, wherein one side of the distillation tower is communicated with a feed pipe, and the top of the distillation tower is communicated with a steam discharge pipe connected with the condenser; one side of the distillation tower is communicated with a reboiler; the condenser has a normal refrigeration temperature and an energy-saving refrigeration temperature, and in the glycerin distillation device with the heat energy recycling function, a part of liquid phase is guided into the distillation tower and then is matched with a gas phase which is not condensed by the condensation tank, so that the gas phase which is not condensed by the condensation tank is pressurized and then is condensed by the condensation tank; according to the utility model, the gas phase inside the distillation tower is guided to the liquid phase, and the liquid phase is scattered by utilizing the blade fan, so that the gas phase is in uniform contact with the liquid phase, and therefore, the gas phase is guided into the distillation tower, the efficient separation of glycerol is also realized, and the product quality is improved.

The carbon dioxide trapping system based on solar energy comprises an absorption tower which is provided with a first inlet, a first outlet, a second inlet and a second outlet; the desorption tower is provided with a third inlet, a third outlet, a fourth inlet, a fourth outlet and a fifth outlet; an inlet of the first pipeline is communicated with the fourth outlet, an outlet of the first pipeline is communicated with the fourth inlet, and a first pump body is arranged on the first pipeline; the reboiler is used for heating the liquid in the first pipeline; the solar heat collector comprises a light gathering piece, the light gathering piece is used for gathering sunlight, the sunlight gathered by the light gathering piece serves as a heat source of the reboiler, the light gathering piece is arranged on at least one of the absorption tower, the desorption tower and the solar installation frame, and the solar installation frame, the absorption tower and the desorption tower are arranged at intervals. Therefore, the carbon dioxide trapping system based on the solar energy has the advantages of reducing energy consumption and saving energy.

The utility model discloses a distiller heating rectification device which comprises a distiller main body, a circulating pipe fixedly connected to the lower side wall of the distiller main body, a reboiler fixedly connected to one end of the circulating pipe, a heating assembly installed inside the reboiler, a connecting pipe fixedly connected to the upper side wall of the reboiler, and a heating assembly installed inside the connecting pipe. A Venturi tube is fixedly connected to the upper end of the connecting tube, and a connecting neck, a liquid outlet and a liquid inlet are formed in the Venturi tube; the upper side wall of the distiller main body is fixedly connected with a first gas outlet pipe, one end of the first gas outlet pipe is fixedly connected with a condenser, and the output end of the condenser is fixedly connected with a backflow device. According to the utility model, the venturi tube can effectively promote the mixing of heating liquid and reflux liquid, and enables the mixed liquid to be filled with a large number of fine bubbles, so that the heating efficiency of the distiller can be effectively improved, the mixing speed of raw materials is accelerated, and the raw materials are effectively and uniformly heated.

The invention discloses a source and storage integrated low-carbon power generation system and an operation method. The system comprises a coal-fired power generation subsystem, a decarburization subsystem and a pump heat energy storage subsystem. In order to improve the operation flexibility and the energy efficiency level of the system, the system is optimized as follows: (1) in a low ebb of electricity consumption, electric energy is output to drive a compressor to pressurize and heat steam extracted by an intermediate-pressure cylinder, then molten salt is heated, and then the steam enters a reboiler after acting through an expansion machine; and finally, redundant electric energy is converted into heat energy of the fused salt to be stored. And (2) in the peak period of power utilization, the feed water from the deaerator is heated by the high-temperature fused salt stored in the fused salt storage tank and then enters the expansion machine to do work, so that the output of the decarburization coal-fired power generation unit is improved. And the extracted steam of the intermediate-pressure cylinder acts through the expansion machine and then enters the reboiler. And (3) normal-temperature water serves as a heat absorption working medium, waste heat in the decarburization process is sequentially absorbed according to the heat grade, and part of medium-pressure cylinder extraction steam is replaced under the action of the ejector to provide heat for the reboiler. According to the system, the carbon capture energy efficiency punishment is effectively reduced, and the operation flexibility is improved.

The invention discloses a system and a method for capturing cement kiln flue gas carbon dioxide based on a high-temperature flue gas waste heat regeneration technology. The system comprises a carbon dioxide absorption system and a carbon dioxide desorption system, the carbon dioxide absorption system comprises a pretreatment tower, an induced draft fan, an absorption tower, a water washing tower and a rich liquid pump; the carbon dioxide desorption system comprises a rich and lean solution heat exchanger, a lean solution pump, a desorption tower, a regenerated gas cooler, a lean solution cooler and a high-temperature flue gas waste heat recovery reboiler. Compared with the prior art, the system and method for capturing the cement kiln flue gas carbon dioxide based on the high-temperature flue gas waste heat regeneration technology can effectively utilize the cement kiln high-temperature flue gas to replace external heat source water vapor to desorb CO2, can effectively reduce the CO2 capturing cost, realizes the cooling of the cement kiln high-temperature flue gas, and improves the recovery rate of CO2. Good application prospects are realized.

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 provides a methanol rectification device based on multi-effect thermal coupling. The methanol rectification device comprises a pre-rectification tower, a negative pressure rectification tower, a pressurization rectification tower, a secondary pressure rectification tower and a normal pressure rectification tower which are connected in sequence, the pre-rectifying tower, the pressurized rectifying tower, the secondary-pressure rectifying tower and the normal-pressure rectifying tower are respectively provided with a pre-tower reboiler, a pressurized tower reboiler, a secondary-pressure tower reboiler and a normal-pressure tower reboiler, the lower part of the negative-pressure rectifying tower is provided with a first negative-pressure tower reboiler and a second negative-pressure tower reboiler, and a gas phase extracted from the top of the secondary-pressure rectifying tower provides heat for the pre-tower reboiler; a gas phase extracted from the top of the pressurized rectifying tower provides heat for a secondary pressure tower reboiler and an atmospheric tower reboiler respectively; a gas phase extracted from the top of the pre-rectifying tower provides heat for a negative pressure tower reboiler I; a gas phase extracted from the top of the normal-pressure rectifying tower provides heat for a negative-pressure tower reboiler II; the energy utilization efficiency in the methanol rectification process can be remarkably improved, the production cost is reduced, the environmental pollution is reduced, and remarkable economic and social benefits are achieved.

The present application provides a molten salt extraction and distillation separation device for zirconium and hafnium tetrachloride, comprising a distillation tower, a reboiler, a reflux tank, a circulation tank, a sublimator, a gas preheater, and a condenser. During installation, the various components are connected in sequence to obtain a complete molten salt extraction and distillation separation device for zirconium and hafnium tetrachloride. The device has a simple structure, is easy to operate, and is convenient to connect, and is suitable for the molten salt extraction and distillation separation of zirconium and hafnium tetrachloride.

The utility model discloses a carbon tetrafluoride purification device which comprises a precooler, a low-boiling-point rectifying tower and a high-boiling-point rectifying tower, the precooler comprises a first tower body, a cooling structure communicated with the top of the first tower body and a heat exchanger communicated with the bottom of the first tower body, and the first tower body is provided with an incoming material inlet through which CF4 crude gas enters the precooler; the low-boiling-point rectifying tower is used for separating the CF4 crude gas cooled by the precooler to form a liquid-phase CF4 mixed solution; the high-boiling rectifying tower comprises a second tower body as well as a high-boiling tower cooling assembly and a reboiler which are positioned at the two ends of the second tower body, the second tower body is provided with a high-boiling tower filler section and a high-boiling tower feed port communicated with the high-boiling tower filler section, the high-boiling tower feed port is used for allowing liquid-phase CF4 to enter, the reboiler at the bottom can vaporize CF4 gas in condensed liquid, and the liquid-phase CF4 gas in the condensed liquid enters the high-boiling tower cooling assembly; and high-purity CF4 gas is obtained at the top, heavy-component impurities are obtained at the bottom, and the liquid-phase CF4 can perform heat and mass transfer with the filler section of the high-boiling tower, so that the purification effect of the CF4 is improved.

The utility model belongs to a carbonyl sulfide production device adopting an external electric heater. Comprising a sulfide raw material supply unit, and the sulfide raw material supply unit is connected with a product filling row through a light component removal rectification unit and a heavy component removal rectification unit; a light component removal rectifying tower is arranged in the light component removal rectifying unit, a heavy component removal rectifying tower is arranged in the heavy component removal rectifying unit, and external ammonia electric heating reboiler units are arranged at the inner lower parts of the light component removal rectifying tower and the heavy component removal rectifying tower; the external ammonia electric heating reboiler unit comprises rectifying tower reboilers arranged at the lower parts in the light component removal rectifying tower and the heavy component removal rectifying tower, an inlet of each rectifying tower reboiler is connected with an outlet of an external liquid ammonia electric heater through a pipeline, and an outlet of each rectifying tower reboiler is connected with an inlet of the external liquid ammonia electric heater through a pipeline; the device has the characteristics that the temperature is accurately controlled, and the thermal load of the rectifying tower is stabilized, so that the purity of a product is ensured while sulfide is separated and purified.

The invention relates to a phenol hydroxylation reaction liquid separation and purification method, which comprises: dehydrating a phenol hydroxylation reaction liquid, and carrying out decoking to reduce the operation temperature of subsequent separation so as to obtain a first material; carrying out vacuum rectification on the first material through a dephenolization tower to obtain a second material; wherein the dephenolization tower comprises a first dephenolization tower and a second dephenolization tower, the second dephenolization tower and the first dephenolization tower are thermally integrated, tower top steam of the second dephenolization tower is used as a reboiler heat source of the first dephenolization tower, and meanwhile, tower top steam of the second dephenolization tower is condensed; the tower top operation pressure of the second dephenolization tower is higher than that of the first dephenolization tower; and separating the second material to obtain catechol and hydroquinone. The technical problem that the benzenediol product yield and the separation energy consumption are difficult to balance in an existing phenol hydroxylation reaction liquid separation system is solved.