39results about How to "Low critical pressure" patented technology

The invention relates to the technical field of power machinery, and discloses a novel power cycle mixed working medium taking CO2 as a main component, as well as a system and a method thereof. The mixed working medium is prepared by physically mixing CO2 with one of propane, cyclopropane, propyne, butane, iso-butane, cis-butene, trans-butene and cyclopentane at certain proportion. The mixed working medium takes CO2 as a main component and one of propane, cyclopropane, propyne, butane, iso-butane, cis-butene, trans-butene and cyclopentane as a second component, so that the mixed working medium can be condensed by the conventional cooling water, and the working medium also has lower flammability. When being used for exchanging heat with a heat source fluid, the mixed working medium has better temperature matching, and the cycling has higher efficiency.

A solar air conditioner consists of tubular energy collectors, an energy-storing part, an automatic light-electric inter-compensator, an exchanger, one-way valves, solenoid three-way valves, a condenser, a distiller, a pressure-reducing throttle valve, an enhancer, pressure-regulating valves, a relay console, a blower, and conveying and conducting pipes. Its outdoor unit consists of the tubular energy collectors and energy storing part with the exchanger and the automatic light-electric inter-compensator inside. The exchanger is connected with the condenser and then enhancer via one-way valves and solenoid three-way valves and pressure-regulating valves. The distiller with the relay console and blower is connected with the condenser and enhancer at both ends of the distiller respectively. The said inter-compensator is connected with relay console via electric wires. The conveying and conducting pipes make connection of all parts. It has a simple structure, saves energy, runs in a closed loop at low cost stably and durably, without media loss and noise, and is easy to be used widely.

The invention relates to a method for extracting grease from oil seeds, in particular to a method for extracting and recycling olive pomace oil from olive pomace. The method is characterized by comprising the following steps of: (1) drying the olive pomace until the water content is less than 13%, and crushing to 40-80 meshes by a crusher; (2) putting the dried and crushed olive pomace into an extraction kettle, vacuumizing until the pressure is less than 1*10<4>pa, and discharging air in the extraction kettle; (3) injecting a tetrafluoroethane solution into the extraction kettle by a plunger pump until the level of the solution submerges raw materials of the olive pomace by using a sight glass for observation; (4) starting stirring and extracting, wherein the extraction pressure is 1.0-1.2Mpa, the temperature is 40-50 DEG C, and the extraction time is 45min; (5) decompressing, raising temperature, evaporating and separating in a separation kettle, wherein the extraction pressure is 0.1-0.5Mpa, and the temperature is 40-50 DEG C; and (6) after subcritical extraction, centrifuging to separate crude oil by a high-speed centrifuge, and filtering to obtain the final olive pomace oil.

The invention provides a flame-retardant high-speed rail seat cover, comprising: a back pocket and a base pocket connected to the back pocket; both the back pocket and the base pocket are made of composite fabrics, the composite fabric is made of composite fibers Polyester yarn and flame-retardant polyester thread are woven at a ratio of 1:2:3; the composite fiber includes a flame-retardant fiber main part and an outer layer arranged outside the flame-retardant fiber main part; the flame-retardant fiber main part includes a pair of side-by-side Flame-retardant polyester thread and a pair of sleeves, a tapered metal fixing sheet is attached to the middle of a pair of flame-retardant polyester threads, and the left and right sides of the metal fixing sheet have curved surfaces for fixing the flame-retardant polyester thread; the middle part of the metal fixing sheet The upper and lower ends are equipped with piercing parts; a pair of sleeves are respectively facing the upper and lower ends of the puncture parts, and the two sides of the sleeves touch the flame-retardant polyester thread; the sleeves are equipped with pressurized gas fire extinguishing agent; the outer layer and the sleeve are both Made of flame retardant thermoplastic resin. The invention solves the defect that the flame retardant effect of the existing high-speed rail seat cover is poor.

The invention discloses a battery fire extinguisher achieving fire extinguishment with hexafluoropropane and carbon dioxide. The battery fire extinguisher comprises a fire extinguishment bottle installed outside a battery box, wherein a vehicle-mounted battery is fixedly arranged in the battery box, a spray pipe of the fire extinguishment bottle is arranged in the battery box, the fire extinguishment bottle is filled with fire extinguishment materials which are intermixtures formed by the hexafluoropropane and the carbon dioxide, both the hexafluoropropane and the carbon dioxide are of a liquid state, the hexafluoropropane accounts for 15%-18% of the intermixtures (by volume), and the balance is the carbon dioxide. The battery fire extinguisher has the advantages of being capable of conducting physical fire extinguishment and chemical fire extinguishment simultaneously.

The invention provides a quaternary mixed refrigerant and relates to the technical field of refrigerants. The quaternary mixed refrigerant includes: propane, dimethyl ether, propylene and trifluoroiodomethane. In the refrigerant of the present invention, propane, propylene, dimethyl ether and iodotrifluoromethane are compounds that do not contain chlorine atoms, thus will not destroy the ozone layer, and the refrigerant will not produce a greenhouse effect and meet environmental protection requirements, thus becoming an alternative The preferred choice for existing chlorofluoromethane refrigerants.

The invention relates to a method for extracting oil from oil plants, in particular to a method for extracting pepper seed oil from pepper seeds. A method for extracting Zanthoxylum bungeanum oil from Zanthoxylum bungeanum, the main features of which include the following steps: (1) first drying the Zanthoxylum bungeanum seeds until the water content is less than 13%, and pulverizing them to 40-80 meshes by a pulverizer; (2) drying Put the pulverized Zanthoxylum bungeanum seeds into the extraction kettle, vacuum down to below 1×104pa, and discharge the air in the extraction kettle; (3) Then use a plunger pump to inject tetrafluoroethane solution into the extraction kettle, and observe the liquid through the sight glass. (4) start stirring and start extraction, the extraction pressure range is 1.0-1.2Mpa, the temperature range is 40-50°C, each extraction time is 30-45min, a total of 3 extractions; (5) then Evaporation separation is carried out in the separation tank under reduced pressure and temperature rise. The separation pressure range is 0.5-0.1Mpa, the temperature range is 40-50°C, and the separation time is 15-25min; (6) After subcritical extraction, the crude oil is centrifuged in a high-speed centrifuge Separate and filter to obtain the final pepper seed oil.

The invention relates to a method of extracting bay leaf oil from bay leaves with subcritical n-butane fluid. The method includes smashing, adding into a tank, dipping with an n-butane solvent, extracting, distilling, and the like. Extraction temperature and pressure can be accurately controlled by utilization of a subcritical extraction device. The method is high in extraction efficiency, low in device manufacturing cost, high in raw material treating amount, simple in process, low in production cost and free of solvent residue. A whole process of the method is performed at low temperature under an oxygen-free state. Extraction and separation are performed at the same time. The extraction speed is high. Recovery and reutilization of the solvent can be achieved.