271results about "Sublimation" patented technology

The invention provides a polymer devolatilization process and a devolatilization system. The devolatilization process comprises the following steps: heating a polymer raw material containing volatile components to obtain a molten polymer, pressurizing the molten polymer, mixing with an entrainer, and feeding into a falling film device; after sudden pressure drop and heating, the entrainer carries volatile components to be separated from the system, and a devolatilization product is obtained; the mass ratio of the polymer raw material to the entrainer is (10: 1)-(10000: 1). According to the polymer devolatilization process provided by the invention, the entrainer with a low boiling point is introduced into a reaction system, a large number of microbubbles are formed through vaporization of the entrainer and azeotropy of volatile components, removal of the volatile components in the material is enhanced through pressure swing flash evaporation, and extremely low pressure does not need to be reached in a devolatilization device.

The invention discloses an electronic waste efficient chlorination comprehensive recovery device and method, and relates to the technical field of chemical metallurgy, the electronic waste efficient chlorination comprehensive recovery device comprises a chlorination reaction cavity, a heating system, a vacuum system, an atmosphere control system and a condensation separation system; the heating system is used for controlling the temperature of the chlorination reaction cavity; the vacuum system is communicated with the heating system; the atmosphere control system comprises a chlorine gas source and a protective gas source; and the temperature of the condensation separation system is gradually reduced. Through the high-purity graphite heating assembly, the sealing structure and the atmosphere control system, the highest heating temperature is 1700 DEG C, the temperature limit of 1200 DEG C of a traditional quartz tube furnace can be broken through, the chlorine corrosion problem is solved, chlorine is not leaked, and the environment is not polluted. High-valued recovery of different metal resources can be achieved through low-temperature pyrolysis, high-temperature chlorination volatilization and three-stage condensation settling separation, and the method has the advantages of being low in energy consumption, high in recovery rate, environmentally friendly and the like and is suitable for industrial metal resource recovery.

The invention relates to the technical field of hippophae rhamnoides extraction, and provides a hippophae rhamnoides cell sap double-cryogenic critical extraction process. A sea-buckthorn cell sap double-cryogenic critical extraction process comprises the following steps: S1, pretreatment: cleaning sea-buckthorn, and draining water to obtain pretreated sea-buckthorn; s2, performing primary cryogenic treatment, sublimation drying and secondary cryogenic treatment on the pretreated sea-buckthorn, and collecting to obtain sea-buckthorn cell sap; during primary cryogenic treatment, the cryogenic final temperature is less than or equal to-45 DEG C; during secondary cryogenic treatment, the cryogenic final temperature is less than or equal to-70 DEG C; according to the technical scheme, the problems that the recovery rate of the sea-buckthorn cell sap is low, active ingredients in sea-buckthorn are easily damaged, and industrialization of extraction of the sea-buckthorn cell sap is difficult to realize in the prior art are solved.

The invention relates to a method using a liquid transfer fluid whereof the triple point is lower than -125°C, such as isopentane, in order to recover the cold energy from the sublimation and melting of substances frozen on exchanger surfaces, and more specifically CO2. The same transfer fluid circulates in two coupled circuits; one is purely a secondary refrigerant, while the other is a heat-transfer fluid when it performs de-icing operations and a secondary refrigerant for transferring the refrigerating power recovered during de-icing operations.

The utility model provides a spray freeze-drying device. The spray freeze drying apparatus includes: a container; the atomizing structure comprises at least one first atomizing nozzle; the freezing structure comprises at least one second atomizing nozzle, the second atomizing nozzle is located on the spraying path of the first atomizing nozzle, the second atomizing nozzle is constructed to be capable of spraying out a freezing medium, and the temperature of the freezing medium is lower than the eutectic point of the to-be-dried material; the stirring mechanism comprises a driving part and a stirring assembly, and the driving part is in driving connection with the stirring assembly; the air outlet end of the ventilation assembly communicates with the containing cavity. According to the technical scheme, the problem that existing spray freeze-drying equipment is low in drying efficiency can be solved.

The utility model provides a vacuum tail gas cold trap, and belongs to the technical field of tail gas treatment. The problem that an existing tail gas treatment cooling effect is poor is solved. The vacuum tail gas cold trap comprises a shell with a liquid outlet in the bottom, a heat exchange pipe arranged in the shell, a barrel body fixedly connected in the shell and an air inlet pipe, an air outlet is formed in the top of the shell, an air inlet is formed in the bottom of the shell, the top of the barrel body is blocked, and an opening is formed in the bottom of the barrel body. A first gas passing channel for tail gas to pass through is arranged between the outer peripheral wall of the barrel body and the inner peripheral wall of the shell, the bottom of the gas inlet pipe is communicated with the gas inlet of the shell, the top of the gas inlet pipe extends into the top in the barrel body from the bottom of the barrel body, and a second gas passing channel for tail gas to pass through is arranged between the outer peripheral wall of the gas inlet pipe and the inner peripheral wall of the barrel body; part of the heat exchange pipe is located in the first air passing channel, and the other part is located in the second air passing channel. The vacuum tail gas cold trap has the advantage of improving the cooling effect of tail gas.

The invention relates to the field of vacuum technology and low-temperature engineering, and discloses a low-temperature cold trap device and a vacuum system.The low-temperature cold trap device comprises a shell provided with an extraction opening; the adapter piece is communicated with the shell and is provided with a channel which can be opened or closed; the condensation assembly is arranged in the shell; the cold source is arranged on the shell and exchanges heat with the condensation assembly; the driving mechanism is arranged on the shell and used for driving the condensation assembly to enter and exit from the shell along the channel. The driving mechanism drives the condensation assembly to enter and exit from the shell along the channel, the low-temperature cold trap device can be arranged in the air exhaust pipeline to achieve high cold trap working efficiency during working, the cold trap can be moved out of the air exhaust pipeline during regeneration, shutdown of the air exhaust pipeline is avoided, air exhaust work is not affected, and the service life of the low-temperature cold trap device is prolonged. Therefore, the air exhaust efficiency and the air exhaust performance of the air exhaust pipeline can be ensured.

A system for capturing a target condensable gas may include: a supersonic condensation nozzle configured to receive a gas flow having a target condensable gas content, and for accelerating said gas into a supersonic gas flow, at least one particle injector in the supersonic nozzle for injecting particles for the particles to be in the supersonic gas flow, whereby target gas condensate forms onto some of the particles, an expansion device defining a conduit having a convex corner causing the flow of the particles with target gas condensate to generate expansion waves to separate the flow into a first flow path having an increased concentration of particles with target gas condensate thereon and into a second flow path of gas with lowered target condensable gas content, and a divider having at least a first conduit, the divider configured to collect the first flow path.

Discontinuously operated desublimator (1) for removing at least one gas component to be desublimated from a gas mixture flow comprising a housing wall (7) as an outer boundary, an inlet nozzle (10) on the housing wall (7) for supplying the gas mixture flow into the desublimator (1), an outlet (6) on the housing wall (7) for discharging the treated gas mixture flow from the desublimator (1), a desublimation zone (4) with temperature-controlled flow channel walls, wherein the flow channel walls are temperature-controlled such that during a loading process the at least one gas component to be desublimated desublimates at the flow channel walls, and that during a subsequent melting process the at least one gas component desublimated in the loading process melts at the flow channel walls, a gas inlet distribution chamber (3) located between the inlet (2) and the desublimation zone (4), and a gas outlet space (5) located between the outlet (6) and the desublimation zone (4), characterized by the fact that at least a first guide plate (8a), a second guide plate (8b) and a third guide plate (8c) are arranged in the gas inlet distribution chamber (3) for the uniform distribution of the gas mixture flow through the flow channels that result from the flow channel walls of the desublimation zone (4), and wherein at least three guide plates (8a, 8b, 8c) each have a distance (H LB, a-b , H LB , b-c ) to their adjacent guide plate or to their adjacent guide plates in the range of 0.01 to 0.9 * D, preferably in the range of 0.10 to 0.50 * D, wherein D corresponds to the equivalent diameter of a circle with the same area as the inlet surface (9).

The invention relates to a sublimation purification device which comprises an evaporation area and at least one condensation area, a rotatable spiral condensation assembly is arranged in a condenser in the condensation area in the axial direction, and the spiral condensation assembly comprises a central rotating shaft and spiral blades extending outwards; through continuous rotation of the spiral assembly, the geometric position of a condensation surface is forcibly changed, a crystal static growth boundary is broken to inhibit formation of loose dendritic crystals, and the dendritic crystals are prevented from touching a pipe wall to cause thermal short circuit and material overheating; in addition, a heat exchange medium runner is arranged in the spiral condensation assembly and comprises an outflow path extending from the central rotating shaft to the outer edge of the blade and a backflow path returning to the rotating shaft. According to the flow channel structure, the structural thermal resistance of long-range metal heat conduction is eliminated, full-surface isothermal cooling of an ultra-large-area spiral surface is achieved, a uniform and continuous cold source is provided while the assembly conveys materials, and finally long-term constancy and efficient and stable capture of condensation efficiency are guaranteed.

The application discloses a method for preparing high-purity ammonium rhenate by separating molybdenum and rhenium, which comprises a reaction device and a reaction process. The reaction device is a T-shaped quartz tube, which is divided into four temperature zones. The first, second and third temperature zones are located in the horizontal tube section of the T-shaped quartz tube, and the fourth temperature zone is the vertical tube section of the T-shaped quartz tube. Oxide raw materials containing molybdenum and rhenium are placed in the first temperature zone. Under the oxygen atmosphere, the high-valence molybdenum and rhenium oxides are separated in the horizontal straight tube by the temperature difference between the temperature zones. The gaseous high-valence rhenium is condensed in the fourth temperature zone to generate high-purity rhenium heptoxide. Under the assistance of high-purity ammonia water, high-purity ammonium rhenate is prepared by cooling and crystallization. The quality of the ammonium rhenate can reach 4N or above.

This application relates to the field of tail gas absorption technology, specifically disclosing a tail gas absorption device for phenothiazine production. The pretreatment mechanism in this application can induce sublimation of phenothiazine microcrystals in the tail gas through multiple stages, allowing the microcrystals to grow sufficiently to a collectable size before entering the collection zone. Then, a multi-stage blade collection mechanism progressively adheres and collects the grown microcrystals, achieving efficient recovery of the phenothiazine microcrystals. Simultaneously, an absorption tower is set up to absorb hydrogen sulfide from the collected tail gas with alkaline solution, and an activated carbon adsorption tower is set up to deeply purify residual hydrogen sulfide and volatile organic compounds. This forms a complete treatment chain with graded treatment and each stage performing its specific function, effectively solving the problem of blockage caused by microcrystals directly entering the absorption tower in existing technologies, while also achieving the recycling of high-value products.

Carbon capture for industrial applications, such as power plants, municipal solid waste facilities, cement production, iron & steel, petrochemicals, desalination and refineries, is disclosed herein. Embodiments employ a cryogenic system and process to capture carbon dioxide, ensuring efficient and effective capture, while also maximizing solvent recovery. This advancement enables a capability to meet the demands of diverse industries with a solution that reduces energy penalties and enhances overall operational efficiency. The approach is scalable, modular, and compact, while minimizing energy consumption.

The present invention provides a trifluoromethyl fluoroformate synthesis system and method. The trifluoromethyl fluoroformate synthesis system comprises a reaction unit, a heat exchange unit, a cold trap unit, a low-temperature rectification unit, and a recycling unit that are arranged in sequence. The reaction unit comprises a feed pipe, a discharge pipe, and a reactor. The discharge pipe is communicated with the cold trap unit by means of a third heat exchange tube, the cold trap unit is communicated with the low-temperature rectification unit, and the low-temperature rectification unit is communicated with the recycling unit. The heat exchange unit comprises a heat exchanger. The low-temperature rectification unit comprises a rectifying section and a stripping section. The recycling unit comprises a first circulating pipe and a second circulating pipe that are used for recycling a product from the rectifying section, wherein the first circulating pipe and the second circulating pipe are respectively communicated with the feed pipe by means of a second heat exchange tube and a first heat exchange tube, and the first heat exchange tube, the second heat exchange tube, and the third heat exchange tube all pass through the heat exchanger. By recycling the product from the rectifying section, the present invention reduces the loss of raw materials, and improves the product yield.

The present invention relates to solvothermal vapor synthesis methods for the crystallization of a phase from a mixture of selected inorganic or organic precursors in an unsaturated vapor-phase reaction medium.

The utility model relates to a superfine selenium powder preparation device which comprises a gasification furnace, a connecting pipeline I is communicated with the gasification furnace, the other end of the connecting pipeline I is communicated with a vapor deposition furnace, a smoke exhaust port is formed in the top of the vapor deposition furnace, a discharge port is formed in the bottom of the vapor deposition furnace, and the superfine selenium powder preparation device further comprises a side blowing guide pipe. And a side blowing guide pipe is arranged beside the connecting pipeline I on the vapor deposition furnace. The device is simple in structure, low in cost and easy and convenient to operate, selenium steam is sufficiently and uniformly quenched by nitrogen, selenium powder products with consistent crystal granularity are obtained, the granularity of the prepared selenium powder can be applied to the high-end fields of photoelectricity, chemical medicine and the like, and uncrystallized selenium steam and impurities can be effectively recycled.

This utility model relates to the field of concentration technology and discloses a low-temperature concentration device for sea buckthorn extract, including a base plate. Two racks are fixedly installed on the upper surface of the base plate, and a processing chamber is installed on the upper surface of the base plate. First mounting plates are fixedly installed on both the left and right surfaces of the base plate. An auxiliary mechanism is set on the racks, and the auxiliary mechanism includes two sliding plates and two top plates. Sliding grooves are formed on the adjacent surfaces of the two racks, and the front and rear ends of the two sliding grooves are open. The two sliding plates are slidably installed inside the two sliding grooves. By rotating the two first handles, the two first handles drive the two top plates away from each other, so that the sliding plates can move inside the sliding grooves, thereby allowing the shelves to move back and forth. This makes it easier for workers to place sea buckthorn extract on the shelves, thereby improving the concentration efficiency of the concentration device for sea buckthorn extract.

The invention relates to the technical field of condensation systems of vacuum dryers, and discloses a condensation system of a vacuum dryer, which comprises a vacuum maintaining module, a condensation trapping module, a refrigeration cycle module and a control module, the vacuum maintaining module comprises a vacuum main pump, a front-stage roots pump, an auxiliary vacuum pump, a stainless steel corrugated pipe, a vacuum valve and a vacuum pipeline, the condensation trapping module comprises a condenser, a heat exchanger and a cold trap, and the refrigeration cycle module comprises a refrigeration compressor, an expansion valve, an evaporator and a condensing coil; the roots pump is connected with the vacuum main pump in series through a stainless steel corrugated pipe, the cold trap is connected with the condenser in series, and an air inlet of the vacuum main pump is connected with an outlet of the condenser through a vacuum pipeline; by means of the system, interruption of the drying process can be avoided, the drying effect is guaranteed, and condensation trapping is optimized.

A method and system for separating sublimable compounds from hydrocarbons are disclosed. A feed fluid stream consisting of hydrocarbons and sublimable compounds is introduced into the upper chamber of a vessel. The feed fluid stream is cooled in the upper chamber, causing a portion of the sublimable compounds in the feed liquid stream to sublimate to form a product gas stream and a sublimable compound snow-like substance, the latter of which is collected in the lower chamber of the vessel. The lower portion of the sublimable compound snow-like substance is melted to form a liquid sublimable compound stream, such that the upper portion of the solid sublimable compound snow-like substance remains as an insulating barrier between the upper chamber and the liquid sublimable compound stream. The sublimable compound stream is removed from the ore liquid at a rate matching the rate of formation of the solid sublimable compound snow-like substance, thereby maintaining the insulating barrier.

An apparatus for intense / rapid cooling and for removing a substance in suspension in a gaseous fluid, said apparatus comprising: i) conveying means (2) for conveying the gaseous fluid; ii) a system (3) for alternatively condensing / freezing or defrosting the substance present in the gaseous fluid comprising: - a first group (31) of cooling or defrosting stages; - a second group (32) of cooling or defrosting stages; - means for collecting the substance (347); - the conveying means (2) comprising a first and a second line (311, 321) operatively arranged in parallel; iii) a heat exchanger (4) for pre-cooling the gaseous fluid upstream of the first group (31) or second group (32); iv) the conveying means (2) comprising means (5) for transporting to the heat exchanger (4) the gaseous fluid that is present downstream of the first group (31) or second group (32) to remove heat from the gaseous fluid that is present upstream of the first group (31) or second group (32) and passes through the heat exchanger (4); v) directing means (6) for directing the fluid alternatively towards the first or towards the second line (311, 321), vi) a first fan (71) and a second fan (72) situated along the conveying means (2); the volumetric flow rate of the gaseous fluid generated by the first fan (71) being greater than the air flow rate generated by the second fan (72).

The present application relates to the technical field of cold trap, and particularly relates to a high-efficiency diffusion pump cold trap, which comprises a cold trap shell, the cold trap shell comprises a cold trap shell body and a cold trap cover body; further comprising a condensing assembly, the condensing assembly comprises a cylindrical main condensing cavity, a plurality of sub-condensing cavities and a coil condensing pipe; the inside of the main condensing cavity forms a main condensing cavity; one end of the sub-condensing cavity extends into the main condensing cavity along the radial direction of the main condensing cavity to form a condensing connecting part, and the other end of the sub-condensing cavity extends out of the condensing diffusion part along the radial direction of the main condensing cavity; the inside of the sub-condensing cavity forms a sub-condensing cavity; the plurality of sub-condensing cavities are respectively communicated with the main condensing cavity; the coil condensing pipe is in contact with the inner wall of the main condensing cavity; and the coil condensing pipe is also respectively in contact with the condensing connecting parts of the plurality of sub-condensing cavities. The present application can efficiently condense the oil vapor and other gas molecules generated by the diffusion pump, and significantly improves the efficiency of the oil vapor trapping, adsorbing and condensing.

In a first embodiment, the disclosure relates to a graphitization furnace including a raw material inlet, a product outlet, and a channel 100 connecting the raw material inlet and the product outlet. The graphitization furnace further includes an ash outlet 110 in gas communication with the channel 100, the ash outlet 110 including an ash collection chamber 120, the ash collection chamber 120 including a hatch 160, and a high surface area body 130 removablely disposed within the ash collection chamber 120, and / or a cooling means 140.

The invention discloses a carbon monoxide purification system and a purification method, and relates to the technical field of carbon monoxide preparation. The carbon monoxide purification system comprises a gas source, a low-temperature cold trap and a purification device. Wherein the gas source is tower top gas of an isotope primary rectifying tower; the low-temperature cold trap is communicated with a gas source and is used for removing part of impurities in tower top gas; the purification device is communicated with the output end of the low-temperature cold trap and is used for reducing metal ions in the tower top gas. According to the carbon monoxide purification system provided by the invention, the combination of the low-temperature cold trap and the purifier is adopted, so that gas-phase impurities and metal ions in carbon monoxide gas can be effectively removed, the investment cost of using low-temperature rectification equipment is avoided, the liquid nitrogen energy consumption caused by using the low-temperature rectification equipment is also reduced, and the whole process is simpler and more efficient.

The application discloses a sewage treatment system and method based on coupling of frozen crystallization and vacuum sublimation, which is suitable for treatment of high-salinity wastewater, refractory organic wastewater and heavy metal wastewater, and comprises a raw water precooling treatment unit, a frozen crystallization unit, a vacuum sublimation unit, a water vapor condensation unit and a control unit; after being cooled by the precooling treatment unit, raw water enters the frozen crystallization unit, a low-temperature rotating wheel rotates in a condensation chamber, and an ice layer is formed on the surface. The ice layer carrying pollutants enters a vacuum sublimation chamber, sublimates under vacuum and low-temperature conditions, water vapor is recovered after condensation, and pollutants such as salts are collected by a drawer-type collection tank. The control unit automatically adjusts process parameters according to real-time monitoring data, and efficient and stable treatment is realized. The application adopts a coupling process design, combines frozen crystallization with vacuum sublimation, synchronously realizes water purification and salt recovery, links a precooling unit with a water vapor condensation unit, and greatly reduces energy consumption compared with a traditional evaporation method.

The utility model provides a cooling filter and a hydrogen recovery system.The cooling filter comprises a shell, an input port and an output port are formed in the shell, a heat exchange cavity is formed in the shell, a plurality of first channels are formed in the heat exchange cavity, and a first cavity and a second cavity are formed in the positions, located at the two ends of the heat exchange cavity, in the shell correspondingly; the input ends of the first channels communicate with the input port through the first cavity, the output ends of the first channels communicate with the output port through the second cavity, and the shell is further provided with a water inlet and a water outlet communicating with the heat exchange cavity. A filtering piece is arranged in the second cavity and is positioned between the output end of the first channel and the output port; the first channel is formed in the heat exchange cavity, hydrogen is introduced into the first channel, cooling water is introduced into the heat exchange cavity, the hydrogen is cooled, meanwhile, the filter part is arranged, ammonia mixed in the hydrogen can be crystallized and separated out on the filter part after being cooled, ammonium salt mixed in the hydrogen is fully filtered out, and a flowmeter or a gas conveying pipeline is prevented from being blocked.

Integrating direct air capture techniques in a novel manner with a novel process for using subterranean coal formations to filter CO2 from mixed gas streams thereby reducing the energy input and cost of removing CO2 from the atmosphere.

The invention discloses a biogas liquefaction system with an anti-ice-blockage desublimation and decarburization mechanism and a biogas liquefaction method. The biogas liquefaction system comprises a raw material gas pretreatment mechanism, a VPSA nitrogen removal mechanism, a desublimation and decarburization mechanism, a biogas liquefaction mechanism and a cascade refrigeration mechanism, the VPSA nitrogen removal mechanism comprises two nitrogen adsorption towers, and the two nitrogen adsorption towers can alternately perform adsorption and regeneration; the desublimation and decarbonization mechanism comprises two desublimation separators, a cold pipe and a heat pipe are arranged in each desublimation separator, and the two desublimation separators can alternately perform desublimation and carbon dioxide crystallization and sublimation and carbon dioxide removal regeneration. The method has the advantages that the carbon dioxide is effectively separated from the biogas in a crystal form, so that the problem of ice crystal blockage caused by the carbon dioxide, water vapor or impurities at low temperature can be prevented, and the whole decarburization and liquefaction process can be stably and continuously operated for a long time.

The sublimable film formation composition of the present invention includes a sublimable substance and a solvent in which a saturation solubility of the sublimable substance is more than 10% by mass.

The utility model relates to the technical field of material collection and condensation, and discloses a collection cold trap. The collecting cold trap comprises a shell, a first cooling medium layer, a material collecting layer, a second cooling medium layer and a heat preservation shielding layer are defined in the shell, the material collecting layer is used for collecting materials, and the first cooling medium layer and the second cooling medium layer are used for introducing cooling media; the heat preservation shielding layer, the second cooling medium layer, the material collecting layer and the first cooling medium layer are sequentially arranged in a sleeved mode from outside to inside. In this way, the collecting cold trap can be rapidly heated and cooled within a large temperature range, and the temperature of the material collecting layer can be accurately regulated and controlled by adjusting the temperature of the two cooling medium layers.

The invention discloses a method and a device for solid phase generation through gas phase mixing reaction and gas-solid separation, the device comprises a device body, a gas preparation area, a mixing reaction area and a product collection area are sequentially arranged in the device body from bottom to top in a communicating manner, the gas preparation area comprises a sublimation bin, and a gas outlet of the sublimation bin extends upwards and is connected with the mixing reaction area above the sublimation bin; a plurality of high-pressure airflow inlets are circumferentially formed in the position, flush with the gas outlet in the top of the sublimation bin, of the bottom end of the mixed reaction area; the mixed reaction area is of a big-end-down conical structure, a conical turbulent flow partition is erected in the middle and comprises an upper conical partition and a lower conical partition with spiral rising arc-shaped concave grains on the surface, and the conical wall of the mixed reaction area extends outwards to form an annular product collecting area on the connecting plane of the upper conical partition and the lower conical partition. According to the invention, high homogeneous mixing and full reaction of gas phase can be realized without extra power, and the whole process of preparation-mixing-reaction-collection is integrated to achieve an integrated process flow.