34 results about "Water productivity" patented technology

This invention relates to coupling apparatus and method for desalting seawater by using nuclear energy. The apparatus comprises: a small-scale nuclear thermal reactor, a reverse osmosis seawater desalting system, a distillation seawater desalting system, and auxiliary apparatus. The method comprises: (1) transferring the heat generated from the small-scale nuclear thermal reactor to the steam generator, and driving the reverse osmosis high-pressure pump with the generated saturated steam in the turbine for seawater desalting; (2) introducing the saturated steam exhausted from the end stage of the turbine to the distillation seawater desalting system for seawater desalting; (3) returning the condensed water to the steam generator; (4) introducing seawater into the distillation seawater desalting system, cooling at the heat discharge section, sending to the reverse osmosis high-pressure pump, pressurizing, sending to the reverse osmosis seawater desalting system, storing the product water in a desalted water tank, and utilizing the condensed seawater or discharging into sea. The method has such advantages as advanced technology, high heat utility, high water productivity and high water quality.

The invention relates to a low-temperature multiefffect distilled seawater desalination system, which comprises a zero-effect vapor generator, n-effect evaporators, a vapor condenser and a vacuumizing system, wherein high-temperature hot water flows in the zero-effect vapor generator through a high-temperature hot water pipe, the zero-effect vapor generator generates starting vapor, the vapor flows in the first-effect evaporator through a pipeline, vapor generated in the first-effect evaporator flows in the next-effect evaporator through a pipeline, until flows in the nth-effect evaporator, and vapor generated in the nth-effect evaporator flows in the vapor condenser to form finished water. By directly utilizing low-temperature residual heat unutilized by industrial mining enterprises, the water production cost of seawater desalination can be greatly lowered, the low-temperature multiefffect distilled seawater desalination system is an important action of offshore industrial and mining enterprises to realize energy saving and emission reduction, electricity consumption is reduced by adopting a hot water direct driven optimized scheme, and the water productivity and energy utilization rate of the whole system can be improved by adopting width counter flowing feeding mode through reasonable design optimization.

The invention relates to a process for recovering the materials separated by a dye and pesticide wastewater reverse-osmosis and nanofiltration combined membrane, comprising the following steps that: the wastewater to be treated in a reservoir enters a medium filter after pressurization; the filtrate of the medium filter enters a microfilter; the filtrate of the microfilter enters a counter-osmosis device after the pressurization; a concentrated solution trapped by the counter-osmosis device enters a nanofilter for separation, dyes, pesticides and related intermediates are recovered from the flowed out liquid; and penetrating fluids of the counter-osmosis device and the nanofiler are mixed and collected. The process can be directly amplified in the engineering application; the membrane technology combined process is adopted to test active red printing and dyeing wastewater in a chemical plant, the rejection recovery rate of the dyes is more than 99.0 percent and the water yield flux after continuous operation of the membrane for four hours is more than 25L / (m<2>.h). The process is adopted to treat the imidacloprid and salicylal wastewater of an insecticide factory, the material recovery rate is more than 70 percent, the salt rejection is more than 90 percent, the removal rate of COD is more than 70 percent and the water productivity is more than 95 percent.

The invention discloses a paddy field precise water-saving irrigation full-automatic control system and an irrigation method thereof. A field irrigation system is reasonably arranged based on the principles of shallowness, dampness, airing, scientific water control and water-saving planting of paddy planting, the precision and informatization of water-saving irrigation of a paddy field are achieved, and the advantages of remarkably reducing the irrigation water amount, improving the water productivity, effectively preventing non-point source pollution, enhancing market competitiveness, guaranteeing food safety and the like can be achieved.

The invention discloses a method for cultivating hot peppers through subsurface drip irrigation, which perfectly combines seedling transplantation and the subsurface drip irrigation to respectively play directors, thereby forming a novel method for cultivating the hot peppers. When using a mode without membrane covering, the method for cultivating the hot peppers through the subsurface drip irrigation can effectively solves the problem of limitation and residual membrane pollution of subsurface drip irrigation technique applied at present. The method for cultivating hot peppers through the subsurface drip irrigation can be used for deep buried subsurface drip irrigation (buried depth of a hollow billet is about 30 cm), and also can be used for shallow buried subsurface drip irrigation (the buried depth of the hollow billet is 3-12 cm). The method for cultivating the hot peppers through the subsurface drip irrigation can further increase water resources utilization and crop water productivity by being applied in arid areas, thereby being capable of reducing harvesting cycle, increasing crop yield, reducing cost, reducing labor strength of workers and links, being beneficial for planting and managing automation of the hot peppers, and achieving large-area mechanization of crop production of the hot peppers.

The invention provides a method and a device for high-efficiently controlling a modular unit. The method comprises the steps of acquiring the current water outlet temperature, and judging whether thewater outlet temperature meets a preset temperature threshold or not; determining whether the number of units working currently needs to be adjusted or not according to a judging result so as to ensure that the water outlet temperature meets the preset temperature threshold; and after the water outlet temperature meets the preset temperature threshold, determining whether the number of units working currently needs to be re-adjusted or not according to the current water yield and the water productivity of the modular unit. According to the method and the device for high-efficiently controllingthe modular unit provided by the invention, on the premise that the water outlet temperature meets the preset temperature, the number of the working units can be dynamically adjusted according to thewater productivity and the water yield of the modular unit, so that an effect on intelligently controlling the modular unit is improved, the working efficiency of the unit is maximized, and an effecton saving energy is achieved.

The invention discloses a method for optimizing the crop water productivity of a salted farmland, which comprises the following steps: 1, setting at least three groups of irrigation and leaching water quantities in combination with the crop evapotranspiration quantity, and calculating the leaching proportion; 2, measuring the conductivity of irrigation water, the salt tolerance threshold value of crops and the yield reduction coefficient, and determining the yield reduction degree by combining the leaching ratio; 3, analyzing the unit water productivity of the salted farmland crops according to the leaching ratio, the evapotranspiration amount and the production reduction degree; 4, determining the relationship between the multiple groups of leaching ratios and the unit water productivity of the corresponding salted farmland crops, and obtaining three fitting coefficients; 5, determining the unit water productivity maximum value and the optimal leaching ratio of the salt-soaked farmland crops according to the fitting coefficient; and 6, determining the optimal irrigation amount according to the optimal leaching proportion. According to the method, the difficulty of optimizing the water productivity of the farmland crops is reduced, required parameters are few and are simple and easy to measure, and therefore the irrigation amount of the salted farmland per unit area can be effectively saved, and meanwhile the crop yield is increased.

The invention relates to a process for recovering the materials separated by a dye and pesticide wastewater reverse-osmosis and nanofiltration combined membrane, comprising the following steps that: the wastewater to be treated in a reservoir enters a medium filter after pressurization; the filtrate of the medium filter enters a microfilter; the filtrate of the microfilter enters a counter-osmosisdevice after the pressurization; a concentrated solution trapped by the counter-osmosis device enters a nanofilter for separation, dyes, pesticides and related intermediates are recovered from the flowed out liquid; and penetrating fluids of the counter-osmosis device and the nanofiler are mixed and collected. The process can be directly amplified in the engineering application; the membrane technology combined process is adopted to test active red printing and dyeing wastewater in a chemical plant, the rejection recovery rate of the dyes is more than 99.0 percent and the water yield flux after continuous operation of the membrane for four hours is more than 25L / (m<2>.h). The process is adopted to treat the imidacloprid and salicylal wastewater of an insecticide factory, the material recovery rate is more than 70 percent, the salt rejection is more than 90 percent, the removal rate of COD is more than 70 percent and the water productivity is more than 95 percent.

The invention discloses a water-flooded layer (i.e. an oil layer water subjected to absorbing water) water productivity quantitative forecasting method and a system thereof. The method comprises the following steps of: establishing a relation chart of the water productivity surplus rate 1-fw of different periods since the investment development of an oil deposit to injection pore volume multiple N1 according to the original water productivity data fw, accumulated water injection rate Wi and oil layer pore volume PV of the oil deposit; and finding the corresponding water productivity data fw according to the relation chart and the current water-flooded layer injection pore volume multiple N2 of the oil deposit, and working out the water productivity data fw corresponding to the injection pore volume multiple N2 of the current water-flooded layer according to a fit computational formula. The system comprises a relation chart establishing module, a computation module and a forecasting module. The water-flooded layer water productivity forecasting accuracy and timeliness can be improved, and the water-flooded layer water productivity forecasting range is broadened by the forecasting method and the system thereof.

The invention discloses a device for quickly adjusting the water impingement of granular materials by using vacuum. The air shutoff device is communicated with the lower end of the shell of the grain spray watering mechanism, the upper end of the shell of the grain spraying water mechanism is communicated with the lower end of the grain inlet section, and the lower end of the hollow silo passes through at least one high airtight The air shutoff device is communicated with the upper end of the grain outlet section; the body wall of the hollow silo is provided with an evacuation pipe. The grain spray watering mechanism includes a casing, a feeder and a water mist nozzle, and a swirl plate is arranged on the outer surface of the feeder, and a secondary swirl plate is arranged on the inner wall of the casing below the feeder. Make the grain evenly rotate and fall, and improve the water effect. The invention has the advantages of simple structure, low energy consumption, good water infiltration effect and high working efficiency, wide application range and good economic and social benefits.

The invention discloses a method for optimizing the water productivity of crops in saline farmland, which comprises the following steps: 1: combining crop evapotranspiration, setting no less than 3 groups of irrigation and rinsing water volumes, and calculating the leaching ratio; 2: measuring irrigation water Conductance, salt tolerance threshold and yield reduction coefficient of crops, combined with the leaching ratio to determine the degree of yield reduction; 3: Analyze the unit water productivity of saline farmland crops according to the leaching ratio, evapotranspiration, and yield reduction degree; 4: Determine the leaching ratio of multiple groups According to the relationship between the unit water productivity of the corresponding saline farmland crops, three fitting coefficients are obtained; 5: Determine the maximum unit water productivity and the optimal leaching ratio of the saline farmland crops according to the fitting coefficients; 6: According to the best The rinse ratio determines the optimal irrigation rate. The invention reduces the difficulty of optimizing the water productivity of farmland crops, requires fewer parameters and is simple and easy to measure, thereby effectively saving the irrigation amount per unit area of ​​saline farmland and increasing crop yield.

The invention relates to a portable drinking water device suitable for filtering bad water bodies and seawater desalination ， It includes a water production pump, a water production operation device, a primary purification unit and a secondary purification unit arranged in the water production pump, the primary purification unit includes a filter element, the filter element includes an inner core and a microfiltration membrane, and the inner space of the filter element is Constitute the first-level channel for water supply, in particular, the filter element is arranged outside the first cylinder of the water-producing pump and connected to the water inlet of the first cylinder through the first pipeline, and the first-level channel communicates with the water inlet; Should The raw water dispenser also includes a water storage bucket communicated with the water outlet of the first cylinder through the second pipeline, RO The reverse osmosis device and the high-pressure water gun, the high-pressure water gun passes through the third pipeline and the fourth pipeline and the water storage barrel and the water tank respectively. RO The reverse osmosis device is connected, and the high-pressure water gun can provide water through RO The pressure required by the reverse osmosis unit. The drinking water dispenser of the present invention is also suitable for harsh water bodies and seawater, and has high water production efficiency and is not easy to be blocked 。

The invention relates to the technical field of urine recycled water treatment, in particular to a treatment method for purifying urine recycled water. The treatment method for purifying the urine recycled water comprises the steps of utilizing a composition of peroxysulphate and concentrated sulfuric acid as a pretreatment agent for pretreating urine; carrying out reduced pressure distillation oratmospheric distillation treatment on the pretreated urine. Compared with the original urine, the water productivity of a distillate exceeds 91.2 percent, meanwhile, 94.11 percent or more of salt and95.6 percent or more of organic matters in the urine can be removed, and a strong technical support is provided for water recycling treatment of the urine.

A method for topdressing nitrogen fertilizer based on soil water potential and rice variety type, which belongs to the field of agricultural technology, uses the interaction effect of soil moisture and nitrogen, and has different responses to soil moisture and nitrogen according to different rice genotypes or variety types. Fertilization is carried out according to the soil moisture status and rice variety type to achieve a synergistic increase in crop yield, water and nitrogen use efficiency. The method is scientific and reasonable. Compared with the conventional nitrogen fertilization method, the present invention determines the nitrogen fertilization at the tillering stage, the initial stage of ear differentiation and the flower differentiation stage according to the different growth stages of rice, different soil water potentials and the types of japonica rice varieties, indica rice varieties and hybrid rice varieties. volume ratio. It solves the problems of unfavorable impact on rice yield and low water and nitrogen use efficiency caused by the mismatch between topdressing nitrogen fertilizer and soil moisture and variety types, effectively improves rice yield and water and nitrogen use efficiency, and makes rice yield and irrigation Water productivity increased by 6.36% to 12.05%, nitrogen fertilizer productivity increased by 9.21% to 21.46%.

The invention relates to a combination culture method of shrimp ponds and net cages: it comprises the transformation of shrimp ponds and the addition of net cages, the addition of broodstock of white shrimp, the introduction of young Penaeus monodon, the introduction of juvenile black prawns, the introduction of ginseng seedlings, and the stage-by-stage feeding of bait and other steps. The method of the present invention introduces white shrimp, Penaeus monodon, cuttlefish and sea cucumber into the same culture pond through the protective effect of the net cage, improves the stability of the ecosystem, and effectively controls the incidence of diseases of white shrimp and Penaeus monodon, At the same time, make full use of the water body, improve the productivity of the water area, and increase economic benefits, which is suitable for promotion in outdoor shrimp ponds in northern China.

The invention relates to a method for cultivating tiger squid in a small northern shed. The method includes selection and transformation of earthen ponds, feeding mysis and white prawn with eggs, feeding bait for mixed culture of mysis and white shrimp, and throwing fertilized eggs of tiger squid , Cultivation of young crows, polyculture of prawns in earthen ponds and polyculture of prawns with bait. The method of the invention introduces mysis, white shrimp and cuttlefish into the same culture pond, improves the stability of the ecosystem, and effectively controls the disease of white shrimp At the same time, make full use of the water body, improve the productivity of the water area, and increase economic benefits. It is suitable for promotion in outdoor shrimp ponds in northern China and promotes the industrialization of northern tiger squid farming.

The invention discloses a remote sensing evaluation method of crop water use efficiency at the farmland scale. Based on the evapotranspiration ET and the total primary productivity GPP of the whole growth period retrieved by remote sensing, combined with effective rainfall data, the water productivity WP of the crop is The main control indicators, through the establishment of crop water consumption-crop total primary productivity model and crop water consumption-water productivity model, determined the appropriate water consumption range for the whole growth period of crops, and finally established a field-scale crop water use efficiency remote sensing evaluation method. The invention effectively makes up for the deficiency of regionalized application of field test research results, and realizes the objective evaluation of the effect of water use on the farmland scale from space.