104results about How to "Lower desalination costs" patented technology

A desalination greenhouse includes a method of fresh water production hybridized with growth and production of a crop. The co-location of a growing crop can provide additional economic incentive to a hybrid system, and provide a moisture enhancement to an internal atmosphere which can be utilized to more efficiently produce and yet benefit from the production of water without the salt content, and as well to concentrate the salt content of brine which is used in another salt production operation. A further substantial achievement could be obtained by desalinization of water by using renewable energy economically and saving 95% of water normally used in open field irrigation of crops.

The invention discloses a novel biological pollution-resistant polyamide reverse osmosis composite membrane and a preparation method thereof. The preparation method comprises carrying out graft modification on a polyamide reverse osmosis membrane through atom transfer radical polymerization (ATRP), carrying out sterilization particle loading to obtain a reverse osmosis composite membrane with bioattachment resistance and antibacterial properties. The reverse osmosis composite membrane polymerization process is carried out at the room temperature and has high controllability. The reverse osmosis composite membrane can be conveniently and fast prepared, has stable performances, effectively improves use efficiency and a use life and reduces a seawater desalination cost.

The invention discloses a double-stage solar seawater desalination device. The double-stage solar seawater desalination device includes a primary water tank, the primary water tank is connected to a condenser through a first electromagnetic valve, the condenser is connected to a photothermal water tank through a second electromagnetic valve, the photothermal water tank is connected to a photoelectric water tank through a first water pump, the photoelectric water tank is connected to a condenser through a second water pump, the condenser is connected to a fresh water tank, and the fresh water tank is connected to the photoelectric water tank through a third water pump. A heater is disposed below the photoelectric water tank, the first electromagnetic valve, the second electromagnetic valve, the first water pump, the second water pump, the third water pump and the heater are connected to the controller. The controller, the first electromagnetic valve, the second electromagnetic valve, the first water pump, the second water pump, the third water pump, the heater and an ultraviolet lamp are connected to a solar power generation mechanism. The photothermal water tank is also connected to a solar heat collection pipe. The invention also provides a double-stage solar seawater desalination method. The device and the method provided by the invention can reduce energy consumption and provide high quality fresh water.

The invention discloses a light-gathering seawater desalination device and a seawater desalination method. The seawater desalination device includes: a semielliptical solar heat collection cover, wherein a freshwater collection tank is arranged at the bottom of the inner wall of the solar heat collection cover, the freshwater collection tank defines an evaporation plane at the bottom of the solarheat collection cover, a freshwater outlet is arranged in the freshwater collection tank, the freshwater outlet is connected with a freshwater storage unit, the b-axis length of the solar heat collection cover is longer than the a-axis length of the solar heat collection cover, and the b-axis is perpendicular to the evaporation plane; a light gathering member, wherein the light gathering member isconfigured to gather sunlight radiated to the solar heat collection cover; and a cooling unit, wherein the cooling unit is arranged outside the solar heat collection cover, and is configured to coolthe outer surface of the solar heat collection cover. The light-gathering seawater desalination device can be directly used on the water surface (such as the sea surface), and has the advantages of simple structure, low cost, convenience in use, high solar energy utilization rate, high seawater desalination efficiency and high water purification efficiency.

The invention discloses a steam condenser type seawater desalting device with a steam turbine generator unit, which comprises a boiler, a steam turbine and a low-temperature multiple effect evaporation seawater desalting device, wherein the steam turbine is connected with the boiler; the steam exhaust output of the steam turbine is connected with the boiler through a steam condenser and a circulating water pump; and the condenser is a first effect evaporator of the low-temperature multiple effect evaporation seawater desalting device. The steam exhaust discharged by the steam turbine generator is used as the heat source of the low-temperature multiple effect evaporation seawater (brackish water) desalting device, i.e. the first effect evaporator of the low-temperature multiple effect evaporation seawater (brackish water) desalting device is substituted for the condenser of a power generating system, the steam exhaust discharged by the steam turbine is condensed into water and cyclically used, thus the costs of power generation and seawater desalination are greatly reduced, and the energy utilization rate of the unit is obviously improved.

The invention discloses an industrial sauerkraut fermentation process. The process comprises the following steps of fresh vegetable acceptance, first low salt high acid salt stain, second low salt stain, shaping, cleaning, cutting, desalting, dehydrating, blending, packaging, bacteria extinction and storage. A reasonable salt pre-baking process reasonablely controls the process parameters such astemperature, acidity, salinity and the like, thereby greatly reducing the nitrite content in a sauerkraut finished product, which satisfies the consumer demand for low-salt and high-acid sauerkraut. The process solves the problems of insufficient fermentation, low nutritional value and poor flavor of the sauerkraut by rationally arranging the dosage of a direct-injection lactic acid bacteria agent, a condiment and a nutrient.

The invention discloses a pressure delay osmosis/reverse osmosis combined desalination method, which comprises the following steps of: pressurizing pretreated sewage flow U, successively inputting into first and second pressure delay osmosis devices; pressurizing pretreated seawater flow A, entering into the first pressure delay osmosis device, outputting three flows D, E and F, inputting the flow D into a first energy recovery device for energy absorption, inputting into a first booster pump for supercharging, inputting the flow E into a second booster pump for supercharging, inputting the flow F into a second energy recovery device for energy absorption, inputting into a third booster pump for supercharging, merging the three flows, inputting into a high-pressure membrane module, outputting a strong brine flow P from the membrane module, inputting the flow P into the second energy recovery device to release energy, inputting into a fourth booster pump for supercharging, inputting into the second pressure delay osmosis device, inputting into the first energy recovery device to release energy, outputting product water out from the membrane module, and processing the product water for usage. The method provided by the invention is used to raise energy utilization rate, decrease energy consumption, save desalination cost and reduce discharge load of the strong brine.

The invention discloses a sea water desalination spraying and liquid distributing sprayer which comprises a sprayer seat and a sprayer cover, wherein the sprayer cover comprises an upper part base, a throat part and a lower part spray nozzle; the upper part base is internally provided with a rotational flow chamber; the bottom center of the upper part base is connected with the lower spray nozzle through the throat part; the diameters of the rotational flow chamber and a lower sprayer are both greater than the diameter of the throat part; the sprayer cover comprises a main body; the bottom center of the main body is provided with an inverted circular truncated cone inner core; the outer periphery of the inverted circular truncated cone inner core is provided with a plurality of spiral flow guide blades which are distributed at intervals; flow guide grooves are formed among the plurality of spiral flow guide blades which are distributed at intervals; the main body is arranged on the upper part base; the inverted circular truncated cone inner core and the spiral flow guide blades extend into the rotational flow chamber. The sprayer provided by the invention ensures that the flow rate distribution is of a curve approximate to a trapezoid which is higher in the middle and lower in periphery, fills up the defects that liquids in the middle of the spray nozzle are hollow in the traditional rotation flow spray nozzle and the liquid distribution quantity is low, and improves the sea water liquid distribution uniformity in spraying by overlapping a plurality of sprayers, thereby improving the using efficiency of a sea water desalination heat transfer pipe effectively.

The present invention relates to a method and equipment for improving latent heat utilization rate in seawater desalination and provides a method for improving latent heat utilization rate in seawater desalination. The method comprises the following steps: providing a thermoelectric device and electrifying the thermoelectric device. The invention further discloses equipment for improving latent heat utilization rate in seawater desalination.

The invention discloses a reverse-osmosis seawater desalting device based on organic rankine cycle; the reverse-osmosis seawater desalting device comprises an organic rankine cycle system and a reverse-osmosis system; the organic rankine cycle system comprises an evaporator, an expansion machine, a condenser and a working medium pump communicated in sequence; the outlet of the working medium pump is communicated with the inlet of the evaporator; the reverse-osmosis system comprises a high-pressure pump, an energy recovery device, a reheater and a reverse-osmosis membrane connected in sequence; fresh water generated by the reverse-osmosis membrane enters a fresh water tank to be stored; strong brine is discharged into a strong brine tank; a waste heat supply pipeline is communicated with a waste heat pipeline of the reheater through a branched pipeline; an electric adjusting valve is arranged on the branched pipeline; and the evaporator, the condenser and the reheater are convective heat transfer devices. According to the invention, industrial waste heat is used as the power in the reverse-osmosis seawater desalting process, so that high-efficiency recovery of waste heat is realized; simultaneously, raw seawater is pre-heated to the optimal temperature of the reverse-osmosis membrane, so that the reverse-osmosis membrane always runs at the optimal temperature; and thus, the service life of the reverse-osmosis membrane is effectively prolonged.

The invention provides a solar energy and ocean temperature difference energy cascading type power generation device and a utilization method thereof. The cascading type power generation device comprises a solar energy water heater which is used for heating surface seawater, a multi-level flash tank which is connected with a high-temperature seawater outlet of the solar energy water heater, an organic Rankin power generation system which is connected with the multi-level flash tank and a deep layer cold seawater supply pump which supplies cooling water for the organic Rankin power generation system; the organic Rankin power generation system comprises an evaporator, an expansion machine which is provided with an electric generator, a condenser, an organic working medium storage tank and an organic working medium pump which are sequentially connected and form into an organic Rankin power generation system; the evaporator is connected with the multi-level flash tank. The cascading type power generation and seawater desalting device heats the surface seawater to compensate the ocean thermal energy through solar energy and generates electricity through the organic Rankin power generation technology, meanwhile prepares fresh water through condensing fresh water of the evaporator and enables various energy resources to be comprehensively utilized.

The invention discloses a dual-heat-source seawater desalination system driven by a supercritical CO2 heat pump. A CO2 compressor is communicated to a first-effect first distiller; the first-effect first distiller is communicated to a vortex tube; a hot end outlet of the vortex tube is communicated to a first-effect second distiller; CO2 discharged from the first-effect second distiller is gathered in a cold end outlet of the vortex tube; the cold end outlet of the vortex tube is communicated to a first evaporator and a second evaporator; the first evaporator and the second evaporator are communicated to an air suction opening of the CO2 compressor; seawater passes through a steam condenser and a preheater , then enter the first-effect first distiller and is successively distilled by the first-effect first distiller, the first-effect second distiller and a second-effect distiller; steam outlets of the first-effect first and second distillers are communicated to the second-effect distiller; a steam outlet of the second-effect distiller is communicated to a steam inlet of the steam condenser; freshwater steam is condensed by the first evaporator; concentrated seawater is condensed by the second evaporator. The dual-heat-source seawater desalination system is efficient, energy-saving and environmentally friendly.

The invention relates to a seawater desalination method, which uses the temperature difference between surface seawater and deep seawater to cause seawater evaporation and aqueous vapor condensation. The basic principle includes heating the surface seawater by using solar energy, then boiling the seawater at a low temperature by reducing atmospheric pressure, and then filling the aqueous vapor in a closed container, and finally condensing the aqueous vapor into fresh water after low-temperature deep seawater cooling. At the same time when the aqueous vapor condenses in large amount, atmospheric pressure in the closed container is reduced, and low atmospheric pressure is consequently favorable for re-boiling the seawater. The process can recycle, and fresh water is continually produced accordingly. The method has the advantages that seawater can boil at low temperature in low atmospheric pressure condition, thereby consuming a small amount of energy resource, which has low cost, is suitable for commercial scale process, and has great commercial value.

The invention belongs to the technical field of seawater desalination, and concretely relates to a two-stage compression heat pump seawater desalination device with combined action of freezing and evaporation. A refrigerant circulating system comprises a first compressor, a first condenser, a first throttle valve, an evaporator, a second compressor, a second condenser, a second throttle valve, a gas-liquid separator and a third heat exchanger; a first seawater desalination system comprises a first seawater tank, a first water pump and an evaporator; and a second seawater desalination system comprises a second seawater tank, a second water pump, a first condenser, a second condenser, a vacuum pump, a second heat exchanger and a freshwater tank. Freshwater is prepared by adopting a two-stagecompression heat pump technology, and seawater is frozen on the evaporator side to form salt-free ice; seawater is heated on the condenser side to form salt-free water vapor, and the seawater is heated by the two condensers to easily reach the boiling point and be evaporated; and ice on the evaporator side can be melted through refrigerant circulation.

The invention discloses a distributed energy small-size seawater desalination system control method and a device for realizing the control method. The invention aims at providing a method which enables energy supply to be matched with stable operation modes of freshwater production capacity at any time, so as to guarantee the stable production of freshwater. The method comprises the following steps that: 1) the system is started up; 2) automatic scanning and detection are conducted, and when an external power grid or diesel engine power generation device is unavailable, the system automatically screens a fourth working mode; 3) a seawater desalination production working mode is started; 4) the system priorly adopts a first working mode for scanning; 5) when the system detects energy working conditions which cannot satisfy the first working mode, the system is automatically shifted to a second working mode; 6) when conditions cannot satisfy the second working mode, the system automatically enters the fourth working mode; and 7) when the fourth working mode is screened, the system enters a third working mode to start to produce freshwater. The distributed energy small-size seawater desalination system control method and the device for realizing the control method belong to the technical field of seawater desalination.

The invention belongs to the technical field of seawater desalination, and particularly relates to a double-effect air heat dissipation cascade heat pump seawater desalination device. A first refrigerant cycle comprises a first compressor, an evaporative condenser, a first throttle valve and an evaporator; a second refrigerant cycle comprises a second compressor, a condenser, a second throttle valve and an evaporative condenser; a first seawater desalination system comprises a first seawater tank, a first water pump and an evaporator, and seawater in the first seawater tank is pumped to the evaporator by the first water pump to form salt-free ice; a second seawater desalination system comprises a second seawater tank, a second water pump, a condenser, a vacuum pump, a third heat exchangerand a fresh water tank; and the seawater in the second seawater tank is conveyed to the condenser by the second water pump to be heated and vaporized to form salt-free water vapor. The cascade heat pump is used for preparing fresh water, and is suitable for seawater desalination in areas with severe cold winter; and the condenser and the evaporator are combined to prepare fresh water together.

The invention provides a seawater desalination and ice storage coupling system which comprises a centrifugal machine, the centrifugal machine comprises a box body, a cover body, a rotary drum, a centrifugal motor, a spiral scraper and an operating mechanism, a centrifugal liquid inlet hole is formed in the cover body, a plurality of through holes are formed in the side wall of the rotary drum, the upper end of the spiral scraper is fixedly connected or integrally connected with a discharging rod, the cross section of the discharging rod and the cross section of the spiral scraper are both in a V shape or a U shape, the upper portion of the box body is provided with a centrifugal discharging hole connected with the discharging rod, and the lower portion of the box body is provided with a drainage hole communicated with an inner cavity of the box body. By arranging the spiral pipeline and the discharging rod, ice crystals can be completely extracted under the condition that the centrifugal machine does not stop working, the efficiency is relatively high, ice obtained after centrifugal desalination is stored, cold energy is transferred in time and space, electricity generated by renewable energy can be effectively consumed, and arbitrage can be carried out according to the difference between peak electricity and off-peak electricity.

The invention discloses an orthopaedic internal fixation fibroin component and a preparation method of the component. The preparation method comprises the steps of: 1, performing desalination by a diffusion dialysis-electrodialysis integrated technology to prepare a high-purity fibroin solution, 2, converting the fibroin solution into anhydrous fibroin by a vacuum freeze drying technology, 3, dissolving the anhydrous fibroin in hexafluoroisopropanol to form a hexafluoroisopropanol solution of the fibroin, 4, injecting the hexafluoroisopropanol solution of the fibroin into a mold to prepare a fibroin solid by a methanol treatment and airing technology, and 5, machining the fibroin solid into a bone nail and a bone plate. The orthopaedic internal fixation fibroin component prepared by adjusting molecular weight, molecular distribution, crystallization forming parameters and processing parameters has excellent mechanical strength and biocompatibility, is not required to be taken out by secondary operations, is controllable in a degradation rate and free from toxic and immunological rejection effects, and has wide clinical application prospects, and degradation products are amino acidand polypeptide capable of being absorbed by a human body.