643 results about "Dry ice" patented technology

A thermocarrier box includes an outer shell and insulated panels coupled to a bottom wall of the outer shell and to side walls of the outer shell. The thermocarrier box includes an inner box positioned within the outer shell such that a bottom wall of the inner box and side walls of the inner box are each coupled to one of the insulated panels. Another insulated panel is positioned over the inner box. A lid is positioned over the another insulated panel such that the another insulated panel is positioned between the lid and the inner box. Methods of assembly are provided.

The invention provides an anti-sticking roller self-cleaning pole piece pressing device for lithium battery production, which comprises a supporting plate and two groups of supporting rods symmetrically arranged on the top surface of the supporting plate, an operation part is arranged between the two groups of supporting rods, a plurality of groups of vertically parallel pressing roller pieces are arranged in the operation part, the two ends of the pressing roller pieces are connected with the supporting rods, and one group of pressing roller pieces is connected with the supporting rods in a sliding manner. A driver for driving the support rod to move and rotate is arranged on one side of the support rod; cleaning parts are arranged on the two sides of the supporting plate, an operation part is located between the cleaning parts, a cleaning assembly comprising a mounting frame and two sets of scrapers is arranged in each cleaning part, the scrapers scrape and press roller impurities, the mounting frames are connected with the supporting rods through lead screw structures, and the scrapers are mounted in the frames and make contact with the rollers; and a dry ice spraying part for spraying dry ice particles to the compression roller piece is also arranged in the group of cleaning parts. The device realizes self-cleaning of the compression roller piece through the cleaning assembly and the dry ice spraying part, solves the problems that a traditional device depends on manual cleaning, is low in efficiency and is easy to damage the compression roller, and guarantees the production quality and efficiency of the lithium battery pole piece.

The invention relates to the technical field of dry ice cleaning, and discloses storage type dry ice cleaning equipment and a using method of the storage type dry ice cleaning equipment. The storage type dry ice cleaning equipment comprises a storage unit, a carrying unit and a cleaning unit. The storage unit stores multiple pieces of dry ice, the cleaning unit is used for cleaning a surface to be cleaned, the carrying unit comprises a translation mechanism and a carrying mechanism, the carrying mechanism is arranged on the translation mechanism and comprises a moving assembly and a clamping assembly, the moving assembly is connected with the clamping assembly, and the clamping assembly is used for clamping the dry ice. The moving assembly is used for driving the clamping assembly to move between a dry ice taking opening of the storage unit and an initial position and between the initial position and a dry ice feeding opening of the cleaning unit, and continuous automatic feeding and cleaning of multiple pieces of dry ice are achieved through cooperative operation of the storage unit, the carrying unit and the cleaning unit; and the influence of manual intermittent feeding on normal cleaning work is avoided.

The invention relates to the technical field of dry ice bag boxing, in particular to an automatic dry ice bag boxing system which comprises a first support and a second support which are arranged in a T shape, and material box placing positions used for placing material boxes are arranged on the two sides of the second support. A chain plate conveying assembly is arranged on the first support, and a centering stacking assembly and a centering clamping assembly are arranged on the second support. The centering and stacking assembly is used for centering and stacking the pushed dry ice bags and is driven by a centering and stacking assembly translation mechanism to translate the dry ice bags to the centering and clamping assembly; the centering material clamping assembly is driven by the centering translation lifting mechanism to conduct centering clamping on the entering dry ice bags, the dry ice bags are driven by the centering material clamping assembly translation mechanism to enter the position adjacent to the material box, and the dry ice bag modules are sequentially stacked in the material box through driving of the centering translation lifting mechanism. The system is compact and simple in structure, does not occupy space, and can achieve centering pressing stacking and centering clamping of the dry ice bags to ensure subsequent accurate clamping and carrying of a robot.

The invention relates to a dry ice driven circulating cooling system and individual cooling clothes, comprising a heat exchange device provided with a storage cavity and a cooling cavity, the storage cavity and the cooling cavity being close to each other; the driving device comprises a driving device barrel, an extrusion piston, a sealing plug and an extrusion elastic piece, the extrusion piston is movably connected into the driving device barrel in a sealed mode and divides the driving device barrel into a driving cavity and an extrusion cavity, the driving cavity communicates with the storage cavity, the extrusion cavity communicates with the cooling cavity, and the driving cavity is provided with an exhaust port used for exhausting gas; the sealing plug is connected with the piston, and the extrusion elastic piece applies elastic force towards the side where the driving cavity is located to the extrusion piston and / or the sealing plug; the cooling pipe is communicated with the cooling cavity and the extrusion cavity; the dry ice is arranged in the storage cavity; and the cooling liquid circularly flows among the cooling cavity, the extrusion cavity and the cooling pipe. The dry ice is used as a cold source, frostbite caused by too tight contact between the dry ice and the human body is prevented, the use time is long, carrying is convenient, and no extra power device is needed.

The invention provides a pipeline cleaning system which comprises a support unit, a cleaning agent spraying unit, a dry ice spraying unit and a high-pressure gas unit, a plurality of moving units are arranged on the support unit, and the moving units are suitable for moving in a pipeline; the cleaning agent spraying unit is arranged on the support unit and comprises a first feeding assembly and a plurality of first nozzles, and the first feeding assembly is connected with the first nozzles and is suitable for conveying a cleaning agent to the first nozzles; the dry ice spraying unit is arranged on the support unit and comprises a second feeding assembly and a plurality of second nozzles, and the second feeding assembly is connected with the second nozzles and suitable for conveying dry ice to the second nozzles; the high-pressure gas unit is arranged on the support unit and communicates with the cleaning agent spraying unit and the dry ice spraying unit so as to be suitable for conveying high-pressure gas. The cleaning method combining cleaning agent cleaning and dry ice cleaning is adopted, rapid stripping and deep removal of pollutants on the inner wall of the pipeline can be achieved, and the safety of the pipeline in the cleaning process is improved while the cleaning effect is improved.

The utility model relates to the technical field of deburring devices, and discloses a dry ice machine lens double-face deburring device which comprises a deburring bin and a rotating frame, the top end of the rotating frame is fixedly connected with an air cylinder, an output shaft of the air cylinder is fixedly sleeved with a beating rod, and the upper side and the lower side of an inner cavity of the rotating frame are fixedly connected with vibration springs. A clamping plate is fixedly connected to the side, away from the rotating frame, of the vibration spring, a guide rod is fixedly connected to the side, close to the vibration spring, of the clamping plate, a flow guide bin is fixedly connected to the bottom end of the deburring bin, and a collecting box is slidably connected to an inner cavity of the flow guide bin. And then the clamping plate drives the materials to vibrate, so that chippings on the surfaces of the materials are shaken off to an inner cavity of a flow guide bin and are collected to an inner cavity of a collecting box along the flow guide bin, vibration of the materials is achieved, and the situation that burrs are still adsorbed to the surfaces of the materials after being removed and cannot be rapidly removed is avoided.

The invention belongs to the technical field of laser-hollow cathode arc composite welding. The embodiment of the invention provides a laser-hollow cathode arc composite coaxial welding torch and a welding method. In order to solve the problem that the fusion depth cannot be continuously increased when the laser power is relatively high, the space between the hollow cathode and the welding workpiece is cooled through compressed gas, and in order to enhance the cooling effect, a dry ice coolant is further arranged at a cooling gas outlet through a second channel, so that the cooling effect is improved. A dry ice cooling agent is sprayed to the space between the hollow cathode and the welding workpiece by means of the pressure of compressed gas, and the space between the hollow cathode and the welding workpiece is further cooled or metal steam, air, inert gas, plasma and / or welding plumes are discharged in a manner of blowing or sucking air from the center of the hollow cathode; therefore, the influence of gas above the electric arc and high-temperature ionization of the gas on laser transmission is avoided, and a larger fusion depth is obtained.

The utility model discloses a multifunctional cleaning device which comprises a control table and a portal frame. The portal frame is arranged at one end of the console, one side of the top of the portal frame is cooperatively connected with a cleaning assembly, and the cleaning assembly comprises a plasma cleaning assembly or a dry ice cleaning assembly; a conveying module is arranged at the top of the console, a jig is connected to the top of the conveying module in a matched mode, and at least one workpiece is arranged on the jig; the cleaning assembly is used for cleaning the workpiece on the jig; workpieces on the jigs are controlled to move flexibly through the conveying module, the jigs are provided with the containing grooves and the adsorption holes in the jigs to fix the workpieces, meanwhile, the cleaning assemblies are controlled to accurately control the positions above the workpieces, the cleaning assemblies can be used for plasma cleaning or dry ice cleaning, and therefore multifunctional cleaning is achieved.

The invention discloses a device and method for cleaning the interior of a large complex sealing structure. The device comprises an ice conveying system, an oil conveying system and an environment control system. The oil conveying system is used for storing and conveying cleaning fuel oil, and the environmental control system is connected with the fuel oil system and connected into a device to be cleaned so as to form a closed cleaning system. The environment control system is further used for being connected into the ice conveying system, the ice conveying system conveys dry ice into the environment control system, the dry ice is mixed with cleaning fuel oil provided by the fuel oil system, and the dry ice and cleaning liquid are mixed and then conveyed to the device to be cleaned. A mixture of dry ice and cleaning liquid is periodically put into a to-be-cleaned device, an inlet and an outlet of the to-be-cleaned device are closed, cleaning fuel oil is driven by carbon dioxide gas generated by sublimation of the dry ice in the pressurization and decompression processes to generate vortex disturbance, and the interior of the to-be-cleaned device is cleaned. The problems that in the prior art, cleaning does not reach the standard, and efficiency is low are effectively solved.

The invention relates to the technical field of plant component extraction, in particular to supercritical extraction equipment for plant component extraction, which comprises an extraction mechanism, the device further comprises a sealing mechanism, a smashing mechanism and a crushing mechanism. Dry ice is crushed through the crushing mechanism to form dry ice particles, the dry ice particles are discharged into the crushing mechanism at a high speed through the crushing mechanism, spices in the dry ice particles are crushed, then the crushed spices are discharged into the extraction mechanism through the crushing mechanism, and the extraction mechanism is sealed through the sealing mechanism. Carbon dioxide gas is continuously discharged into the extraction mechanism through supercharging equipment, oil substances in the spices are dissolved in liquid carbon dioxide, the internal temperature of the extraction mechanism is adjusted through the extraction mechanism, the liquid carbon dioxide is in a supercritical state, and the oil substances in the spices are extracted by reducing the pressure in the extraction mechanism. The liquid carbon dioxide is gasified, and oil substances in the spices are left, so that the practicability of the equipment is improved.

The invention provides a stainless steel CO2 deep treatment high-brightness surface finishing process. The stainless steel CO2 deep treatment high-brightness surface finishing process comprises the following steps: a) adopting supercritical CO and a biological surfactant for synergistic degreasing; b) realizing transition from rough polishing to fine polishing through gradient dry ice spraying; c) performing pulse laser micro-melting repair under the protection of a CO air curtain; and d) generating the nanoscale CrO film by utilizing supercritical CO electrochemical passivation. Through the supercritical CO synergistic degreasing, gradient dry ice polishing and laser repairing processes, submicron surface finishing is achieved while the oxidation reaction is inhibited, and the method has the technical advantages that the machining efficiency is improved, the surface uniformity is enhanced, and the environmental load is reduced.

The utility model discloses a liquid air energy storage system coupled with air separation and dry ice preparation, which comprises an air compression liquefaction subsystem, a cold energy gradient utilization subsystem, an air expansion power generation subsystem and a heat storage subsystem, the air compression and liquefaction subsystem, the cold energy gradient utilization subsystem and the expansion power generation subsystem are sequentially connected through a compression and liquefaction pipeline and an expansion power generation pipeline, and the heat storage subsystem is connected with the air compression and liquefaction subsystem and the air expansion power generation subsystem through a heat storage circulation pipeline. The cold energy gradient utilization subsystem is arranged to replace an existing low-temperature cold storage unit, the liquid air energy storage system is coupled with the air separation unit and the dry ice preparation unit, liquid air cold energy gradient utilization is achieved, and meanwhile energy consumption and construction cost of the air separation system are reduced. The power generation stability of the liquid air energy storage system is guaranteed, and the comprehensive efficiency and the environmental protection property of the liquid air energy storage system are improved.

The utility model provides a high-temperature flue gas quenching type waste heat boiler which comprises a main flue gas inlet pipe, a main flue gas outlet pipe and a boiler body fixedly arranged between the main flue gas inlet pipe and the main flue gas outlet pipe, and the input end and the output end of the boiler body are connected and communicated with the main flue gas inlet pipe and the main flue gas outlet pipe respectively. A plurality of dry ice descaling devices are further fixedly arranged on the main smoke outlet pipe, and the dry ice descaling devices and the boiler body are located on the same axis. The boiler body comprises a bundling sleeve, an upper pipe header and a lower pipe header, the upper pipe header and the lower pipe header are fixedly arranged at the two ends of the bundling sleeve respectively, the upper pipe header and the lower pipe header are communicated with an internal gap of the bundling sleeve, and an inlet section and an outlet section which are communicated with the main smoke inlet pipe and the main smoke outlet pipe respectively are fixedly arranged at the two ends of the bundling sleeve. According to the utility model, through the bundling sleeve arranged in the boiler body, high-temperature flue gas and cooling water are positioned in different areas in the bundling sleeve and complete heat exchange, so that flue gas waste heat of the high-temperature flue gas is effectively recovered, and the mixing condition of the cooling water and the flue gas is avoided.

The invention provides cleaning equipment for mobile phone aluminum shell production and a method thereof, and relates to the technical field of cleaning equipment for mobile phone aluminum shells, the equipment comprises a main body rack, a supporting table located at the bottom of the main body rack and a control box located at the upper end of the main body rack, and the control box comprises a control panel and control buttons; a working table is arranged in the middle of the main body rack, a cleaning part is arranged at one end of the working table, an overturning part is further arranged at the other end of the working table, and the cleaning part comprises a base, an industrial mechanical arm arranged on the base and dry ice nozzles symmetrically arranged on the two sides of the industrial mechanical arm; the overturning part is also connected with a clamping part; according to the mobile phone aluminum shell cleaning device, a mobile phone aluminum shell is clamped in a suspended mode through the clamping component, the mobile phone aluminum shell is overturned through the overturning component, the two faces of the mobile phone aluminum shell are cleaned through the cleaning component, the two mobile phone aluminum shells can be synchronously machined at the same time, and the cleaning stability and efficiency are improved.

The embodiment of the utility model provides a dry ice cleaning system. The dry ice cleaning system comprises: a dry ice buffer container having an accommodating cavity for accommodating dry ice and an outlet part communicated with the accommodating cavity; the stirring assembly comprises a stirring piece, the stirring piece is located in the containing cavity, and the stirring piece can move in the containing cavity; and the dry ice spraying assembly is connected with the outlet part and used for spraying dry ice for cleaning. According to the embodiment of the utility model, the stirring assembly is arranged on the dry ice buffer container in the dry ice cleaning system, the problem of blockage of dry ice conveying when the dry ice capacity is relatively large can be solved through the stirring assembly, and the dry ice cleaning efficiency can be improved while the dry ice capacity of the dry ice cleaning system can be increased.

The utility model provides a returned electric energy meter appearance cleaning device which comprises a rack and is characterized in that a dry ice cleaning assembly and a cleaning tank are arranged on the rack, a transverse moving mechanism and a longitudinal moving mechanism connected with the transverse moving mechanism are arranged on the cleaning tank, and the dry ice cleaning assembly is arranged on the longitudinal moving mechanism. And the dry ice cleaning assembly is connected with external dry ice cleaning equipment through a conveying pipeline. A dry ice cleaning technology is adopted, so that foreign matters such as scratches, dust, greasy dirt, ink marks and adhesive stickers on the shell of the returned electric energy meter can be effectively removed, the cleaning effect on the electric energy meter is improved, and the appearance cleanliness of the electric energy meter meets verification conditions; the cleaning tank meets the requirement that multiple electric energy meters can be cleaned at a time, and the working efficiency of appearance cleaning of the returned electric energy meters is improved.

The invention discloses a quartz tube inner hole cambered surface grinding machine tool, and relates to the technical field of grinding equipment, the quartz tube inner hole cambered surface grinding machine tool comprises a three-axis adjusting mechanism, the adjusting end of the three-axis adjusting mechanism is fixedly connected with a fixing plate, the side face of the fixing plate is fixedly connected with a grinding mechanism, and one side of the grinding mechanism is provided with a fixing mechanism; the device further comprises a cooling liquid cooling mechanism, a dry ice cooling mechanism and a detection mechanism. According to the cooling device, liquid is supplied to the pipeline connecting frame through the liquid supply assembly and the first connecting pipe, spraying cooling is conducted through the multiple nozzles evenly distributed on the periphery of the grinding mechanism, and the reciprocating mechanism drives the nozzles to swing so that the cooling coverage range can be further expanded; the dry ice cooling mechanism supplies dry ice to a spraying pipeline assembly through a dry ice spraying assembly and a second connecting pipe to assist in cooling, the dual-cooling system effectively solves the problem that an existing single cooling mode is insufficient in coverage, local high temperature can be guided out in time, and the situation that a quartz tube is deformed due to uneven thermal stress is avoided.

The invention relates to a dry ice cleaning device for a shoe mold in the technical field of dry ice cleaning, which comprises a mounting box, a device for driving dry ice particles and high-pressure air to be mixed and sprayed is arranged in the mounting box, the device is communicated with a supporting pipe, and the supporting pipe extends to the outside of the mounting box and is communicated with a conveying hose for spraying; the end, away from the supporting pipe, of the conveying hose communicates with a fixing pipe, a plurality of cooling pipes are evenly arranged in the fixing pipe in a circumferential split mode around the central axis of the fixing pipe, one end of each cooling pipe communicates with the conveying hose, and the other end of each cooling pipe communicates with a capillary pipe with the inner diameter smaller than that of the corresponding cooling pipe. One end of the fixing pipe is communicated with the capillary tubes, the other end of the fixing pipe is communicated with a second mixing pipe with a conical structure, and the inner diameter of one end of the second mixing pipe away from the fixing pipe is smaller than that of one end close to the fixing pipe. The capillary tube is arranged, so that the dry ice particles and the high-pressure airflow mixture are further cooled and accelerated by utilizing the Joule-Thomson effect when entering the capillary tube.

The invention discloses a cold and heat energy storage system utilizing supercritical CO2 to generate power. The cold and heat energy storage system comprises a heat pump subsystem, a cold energy storage unit, a heat energy storage unit and a power generation subsystem. The heat pump subsystems are arranged in a stepped mode, and a mixture of dry ice and a liquid phase is generated at a CO2 three-phase point through electric energy driving. The cold energy storage unit is connected to the low-temperature side of the heat pump subsystem and used for storing generated dry ice. The heat energy storage unit is connected to the high-temperature side of the heat pump subsystem and used for storing heat energy generated in the compression process. The power generation subsystem is in fluid communication with the downstream of the cold energy and heat energy storage unit, heats the cold energy and heat energy storage unit to a supercritical state by using the output CO2 and heat energy, and expands to drive a power generator to generate power; the system forms a circulation loop, and fluid discharged by the power generation subsystem flows back to the heat pump subsystem; according to the technical scheme, the carbon dioxide three-phase point is used for achieving cold and heat collaborative energy storage, the energy storage density and efficiency are greatly improved, and finally efficient and stable power generation of renewable energy sources is achieved.

The invention discloses low-temperature severed finger replanting storage equipment and a constant low-temperature system, and relates to the technical field of medical equipment.The low-temperature severed finger replanting storage equipment comprises a box body, a supporting assembly used for containing severed fingers is arranged in the box body, the bottom face of the box body is connected with an ice storage box, and dry ice is contained in the ice storage box; a drain hole communicated with the ice storage box is formed in the bottom wall of the box body, a valve plate used for controlling the drain hole to be opened and closed is installed on the bottom wall of the box body in a sliding mode, and a control component used for controlling the valve plate to slide is installed on the box body. The top of the box body is further provided with a cleaning assembly used for cleaning the severed fingers placed in the box body. A low-temperature environment is provided through dry ice refrigeration, a temperature sensor and a controller are matched to maintain constant low temperature, and the influence of temperature fluctuation on severed finger tissue activity is reduced; the cleaning assembly can clean the severed fingers, the pollution risk is reduced, good conditions are created for severed finger replanting, and the replanting success rate is increased.

The application provides an integrated dry ice cleaning machine, which comprises a rack, an ice storage chamber, an ice mixing system, a gas supply system, a spraying system and an electric control system integrated in the rack; the ice storage chamber is used for storing dry ice particles; the ice mixing system is in communication with the ice storage chamber and receives the dry ice particles; the spraying system is used for spraying the dry ice particles to a surface to be cleaned; the electric control system is used for controlling the operation of the cleaning machine; the gas supply system comprises an air compressor and a gas storage device; the gas storage device is connected to the ice mixing system through a conveying pipe; the conveying pipe is used for conveying compressed air to the ice mixing system to mix the dry ice particles; and the conveying pipe is arranged in a winding shape with an extended path to exchange heat with the outer wall of the ice storage chamber; heat dissipation of the compressed air in the conveying pipe is realized through heat exchange; through reasonable heat dissipation design, the heat dissipation problem of the integrated dry ice cleaning machine is effectively solved, and the efficient operation and service life of the equipment are ensured.

Storage device for a dangerous good (10) comprising at least one battery (11) and / or an accumulator, comprising a lockable, thermally insulated housing (12), a container (16) for dry ice (18), a dosing device (22) for dosing the dry ice (18) that can be fed from the container (16) into the housing (12), at least one sensor (28, 30, 32) for determining housing data, and a control device (34) for controlling the dosing device (22) based on the housing data.

The application discloses an intelligent laser-dry ice composite cleaning method and device, and belongs to the field of stain cleaning. The application is used to solve the problem of unsatisfactory cleaning effect of the prior art on stains with large thickness. The method comprises the following steps: performing visual scanning on a workpiece to be cleaned, obtaining stain thickness distribution on the surface of the workpiece to be cleaned through three-dimensional surface morphology reconstruction, and dividing the surface of the workpiece to be cleaned into multiple sub-regions according to the stain thickness; the sub-regions include three types: an extremely thin sub-region, a medium-thickness sub-region and a large-thickness sub-region; performing cleaning path planning to form three cleaning paths; the cleaning process of the cleaning path of the extremely thin sub-region is laser cleaning; the cleaning process of the cleaning path of the medium-thickness sub-region is laser-dry ice composite cleaning; and the cleaning process of the cleaning path of the large-thickness sub-region is laser-dry ice composite cleaning. The cleaning device comprises a ground rail gantry motion system, a first mechanical arm, a second mechanical arm, a dry ice cleaning system, a visual identification system and a pulse laser cleaning system.

The utility model provides a kind of dry ice spraying device, including heat preservation shell, the upper end of the heat preservation shell is provided with nozzle structure, the inside fixed connection of the heat preservation shell has dry ice bucket, the dry ice bucket includes barrel, the lower part side wall of the barrel is fixedly connected with the mesh of inside and outside conduction, the outside of the dry ice bucket is sleeved with inner heat preservation sleeve, the lower end of the heat preservation shell is penetrated and is fixedly connected with fan.The utility model, it is provided with heat preservation shell and inner heat preservation sleeve, and make air two times turn, i.

The invention relates to the technical field of steam turbine rotor cleaning, in particular to a steam turbine rotor cleaning device which comprises a containing part, a cleaning part and a cleaning part. The air pump is arranged on the accommodating part; the gas conveying piece is connected with the lower space and used for conveying a medium; the transmission part is connected with the gas transmission part and is used for transmitting a medium; the crushing part is arranged in the hollow space and is used for crushing the medium; the first pressure relief piece is arranged on the containing piece and used for conducting pressure relief on the upper space; the first pressure relief piece comprises a pressure valve arranged on the containing piece and an air blowing pipe connected with the pressure valve. And one end of the air blowing pipe extends into the middle space where the crushing piece is located. Dry ice is placed in the containing part, the crushing part crushes the dry ice, the air pump provides an air source to spray out air generated after sublimation of the dry ice from the conveying part, and cleaning of dirt on the surface of the steam turbine rotor is achieved.

The present application discloses a rapid liquefaction, pressurization and transportation system for dry ice, which includes a dry ice raw material cylinder, a dry ice automatic feeding device, a liquid carbon dioxide outlet valve, a heating and heat preservation jacket layer, a high-pressure piston container, a temperature and pressure sensor, a two-way hydraulic cylinder and a high-pressure hydraulic station; the top of the dry ice raw material cylinder is open for feeding dry ice raw materials, and the bottom is connected to the dry ice automatic feeding device through a pipeline; one end of the dry ice automatic feeding device is connected to the dry ice raw material cylinder, the other end is connected to the high-pressure piston container through a pipeline, and a hydraulic device is connected to the side wall at the same time; the lower end of the high-pressure piston container is controlled by the two-way hydraulic cylinder to make the internal piston move up and down reciprocally; the present application uses heating means to convert solid dry ice into liquid carbon dioxide, thereby realizing the rapid on-site preparation of liquid carbon dioxide, effectively saving costs and improving safety, and at the same time having high preparation efficiency, simple operation and small occupied space.

This invention belongs to the field of building materials technology, specifically relating to a solid waste-based high-strength phase change lightweight aggregate, its preparation method, and its application. The solid waste-based high-strength phase change lightweight aggregate provided by this invention comprises the following raw materials in parts by weight: 26-32 parts cement, 4-6 parts steel slag powder, 32-36 parts ice chips, 14-16 parts dry ice, 12-16 parts brick slag powder, 2.7-3.6 parts paraffin emulsion, and 0.3-0.4 parts organosilicon water-repellent agent. This invention uses construction solid waste brick slag loaded with paraffin emulsion to prepare phase change microparticles, and uses cement and steel slag powder to react under ice chips and dry ice conditions to form high-strength lightweight aggregate. Simultaneously, ice chips and dry ice are used for room-temperature pore formation and to improve curing efficiency. The resulting solid waste-based high-strength phase change lightweight aggregate achieves an organic combination of phase change products and pure lightweight aggregate, exhibiting high strength, good stability, and low manufacturing cost. It is a new type of solid waste-based energy-saving building material with higher quality and more convenient application.

The invention relates to the technical field of food processing, in particular to a freeze-dried broccoli processing method. The invention provides a freeze-dried broccoli processing method which comprises the following steps: taking cleaned broccoli, and cutting the broccoli into small flower types which are consistent in size, shape, thickness and height; carrying out instantaneous fixation by adopting steam, immediately soaking the broccoli subjected to fixation in ice water, fishing out the broccoli, and draining water; stacking the quick-frozen broccoli and the dry ice layer by layer; and after the temperature of the broccoli is reduced to-40 DEG C to-60 DEG C, performing vacuum freeze drying until the water content is less than or equal to 3% to obtain the dehydrated broccoli. According to the method, the loss of functional components such as glucoraphanin and polyphenol is reduced; formation of ice crystals is reduced, cell damage is reduced to the maximum extent, the content of functional components is effectively maintained, the color is close to that of fresh broccoli, and rehydration performance is good; the retention rates of functional components of glucoraphanin, flavone and vitamin C in broccoli all reach 98% or above.