214results about How to "Good desalination effect" patented technology

The invention discloses a polysulfonamide nanofiltration or reverse-osmosis composite membrane, and a preparation method thereof. the preparation method for the polysulfonamide nanofiltration or reverse-osmosis composite membrane comprises the following steps: pretreatment of a porous supporting membrane; alternate layer-upon-layer assembling of a sulfonyl chloride organic-phase solution and a polyamine water-phase solution on the surface of the porous supporting membrane via reaction; heat treatment; etc.; wherein heat treatment can be carried out during or after layer-upon-layer assembling. Nanoparticles, a surfactant, a catalytic acid absorbent or catalyst, a pore forming agent and other additives are added into the sulfonyl chloride organic-phase solution and the polyamine water-phase solution. The polysulfonamide nanofiltration or reverse-osmosis composite membrane prepared by using the method has improved desalination performance and acid resistance, smoother surface and lower roughness compared with composite membranes prepared through traditional interfacial polymerization, and has good application prospects in the fields of nanofiltration and reverse osmosis.

The invention relates to a compound demulsifier and a use method thereof. The compound demulsifier comprises alkyl ester of styrene-maleic anhydride copolymer and ethylene oxide-propylene oxide block polymer, the mass ratio of which is 0.1 to 10: 1. The compound demulsifier of the invention, through compound use of the alkyl ester of styrene-maleic anhydride copolymer and the ethylene oxide-propylene oxide block polymer, can achieve better demulsification effect and is particularly applicable to the demulsification and dehydration of high-asphaltene viscous oil.

The invention discloses bitter saline water desalination equipment, which comprises a raw water tank, and a high pressure pump, a reverse osmosis membrane component and a drinking water tank which are sequentially connected. The bitter saline water desalination equipment further comprises a physical-chemical program controlled composite coupling preprocessor consisting of a raw water pump, a laminated filter and a program controlled ultrafiltration device which are sequentially connected. The bitter saline water desalination equipment has the advantages that the process of physical-chemical program controlled composite coupling preprocessing filtration is adopted so that the raw water with different types and different qualities can be pretreated to meet the inlet water requirement for the reverse osmosis membrane component, thus the inlet water quality for the reverse osmosis desalination is improved, the rubber body pollution and the microorganism pollution to membrane elements in the reverse osmosis membrane component are prevented, the unit area permeation flux of the reverse osmosis membrane component is improved, and the protection of the reverse osmosis membrane elements is increased; at the same time, the chemical cleaning frequency of the reverse osmosis membrane elements is reduced, the service life of the membrane elements is prolonged, the operating cost is reduced, and the production efficiency is improved.

The invention relates to a method of preparing pure water using metallurgic sewage which comprises the following steps, (1) reclaiming sewage water, preparing recycled water, wherein the water outlet suspended matter <100mg/l, (2) treating the recycled water, subjecting the recycled water to fine grid filtration, sterilizing, micro-flocculation, entrapping hairs, making the COD <30mg/l, (3) ultra-filtration treatment, passing the recycled water through external pressured immersion type ultra-filtration apparatus for treatment, meeting the requirement of SDI<2, (4) reverse osmosis desalination treatment, loading the ultrafiltrated water into reverse osmosis apparatus for desalinization treatment.

The invention discloses a UiO-66-NH2 composite material as well as a preparation method thereof and an application of the composite material in seawater desalination. The UiO-66-NH2 composite materialcomprises a carrier modified by 3-aminopropyltriethoxysilane and a UiO-66-NH2 film layer, wherein the UiO-66-NH2 film layer is covalently attached to the carrier. According to the preparation methoddisclosed by the invention, the carrier modified by the 3-aminopropyltriethoxysilane is placed into a UiO-66-NH2 film reaction solution for a reaction to obtain the UiO-66-NH2 composite material; andthe UiO-66-NH2 composite material disclosed by the invention has the simple preparation method and excellent seawater desalination treatment performance, and is suitable for large-scale promotion.

The present invention relates to a method capable of making auxiliary desalination by adopting ultrasonic technique before sea-water vegetable fresh-keeping and dehydration processing treatment, belonging to the field of sea-water vegetable food processing technology. Its main processing process includes the following several steps: selecting raw material, washing, scalding and inactivating enzyme (protecting color), freezing, desalination, flavouring, fresh-keeping or dehydration and packaging. Before the sea-water vegetable fresh-keeping treatment and dehydration said invention adopts and ultrasonic auxiliary desalination new process so as to make the sea-water vegetable finished product have good desalination effect (its desalination rate can be up to 30%-60%).

The invention discloses a CDI (Capacitive Deionization) based compound type constructed wetland desalination system. The technical scheme of the invention is that a pretreatment system in the compounded type constructed wetland desalination system is connected with a compound vertical flow constructed wetland system by virtue of a pipeline. The pretreatment system is that: the water inlet and the water outlet of a grille (22) are communicated with the water inlet of a corresponding first pressure pump (23) and the water inlet of a CDI device (3) by virtue of pipelines, andthe water outlet of the CDI device (3) is communicated with the water inlet of a compound vertical flow constructed wetland and the water inlet of a salt drying plate (9) respectively through pipelines.A bottom impervious layer (18) of the compound vertical flow constructed wetland system is sequentially provided with a gravel layer (17), a biological ceramisite layer (13), a zeolite layer (12) and a soil layer (11) upwards, the constructedwetland is uniformly separated into 2n+1 vertical flow treatment tanks (7)along the left and right direction, and the tops and the bottoms of the vertical flow treatment tanksare communicated with one another in a staggered manner. The CDI based compound type constructed wetland desalination system disclosed by the invention is environmentallyfriendly, can effectively solve the problem of clogging and saturation of the soil layer of the wetland, and is good in nitrogen and phosphorus removal effect and desalination effect.

The invention discloses a zero-emission system for treating landfill leachate. The zero-emission system comprises a primary sedimentation tank, an adjusting tank, a hydrolytic acidification tank, a UASB (Upflow Anaerobic Sludge Blanket) reactor, an A/O-MBR (Membrane Bioreactor) system, an MBR membrane water production tank, a nano-filtration (NF) device, a nano-filtration freshwater water production tank, an electrodialysis system, an electrodialysis freshwater tank and an RO (Reverse Osmosis) device, which are connected in sequence, wherein an output end of the RO device is connected with a reverse osmosis concentrated water tank and a reverse osmosis freshwater tank. A treatment technology with the primary sedimentation tank, the adjusting tank, the hydrolytic acidification tank, an efficient anaerobic reactor, the A/O-MBR system, an NF system, electrodialysis and an RO system is adopted, and organic matters and ammonia nitrogen in the leachate can be effectively degraded; a frequentreverse system of the electrodialysis is applied and a high desalting rate can be realized; a concentrated water reduction system combining chemical softening and a membrane is adopted to reduce therigidity of a concentrated solution and improve the total recovery rate; the whole technology has the advantages of low treatment cost, less investment, stable operation and high operability, and zeroemission of landfill leachate treatment is realized.

The invention relates to a preparation method of a carbon nano-tube/mesoporous-carbon composite capacitance-type desalting electrode, which belongs to the preparation field of capacitance-type desalting electrodes. The preparation method comprises the following steps of: adding a carbon nano-tube into a precursor of a mesoporous material, uniformly dispersing by utilizing ultrasonic and magnetic stirring, and forming a high-molecular compound with the mesoporous material around the carbon nano-tube through curing; carbonizing through inert-gas protection to obtain carbon nano-tube/mesoporous-carbon composite-mateiral powder with ordered height and large specific surface area; and finely grinding a sample, smearing the sample onto graphite paper after being mixed with a polytetrafluoroethylene emulsion, and drying to prepare the carbon nano-tube/mesoporous-carbon composite capacitance-type desalting electrode. The preparation method has a simple process and easily-controlled conditions. A carbon nano-tube electrode prepared by the method disclosed by the invention has good electrical conductivity and better desalting performance and has potential application prospects in the aspectof capacitance-type desalting.

The invention belongs to the field of coal chemical processes, and in particular relates to a coal tar desalination process which comprises the following steps: filling desalted water into coal tar, heating to 85-95 DEG C, performing first-stage dehydration by using a horizontal screw centrifuge to remove solid phase of which the particle size is greater than 50mu m, dehydrating until the water content is less than 2%, performing second-stage dehydration by using a flottweg separator so as to remove solid phase of which the particle size is within 5-50mu m, dehydrating until the water content is 0.5% or below, and performing hydrotreating on the treated coal tar. The coal tar desalination process provided by the invention is good in desalination effect, and stable to operate, the desalination rate is greater than 99.5%, the temperature is lower than that of electric desalination, the process is easy to operate, salt decomposition can be avoided, the problem that an oil-water interface cannot be completely separated in a conventional electric desalination process can be avoided, and the problem that an electric desalination tank has sedimentation and scaling can be also avoided.

The invention provides a takyr solonetz improvement method. A physicochemical soil improvement method, a method of salt elimination by irrigation and a crop cultivation method are integrated, an improver and fertilizer are applied to soil to condition the physicochemical properties of the soil, the soil structure is improved, ion exchange conditions are effectively provided and migration of soil salt is accelerated in cooperation with a measure of salt elimination by irrigation, soil desalination is facilitated, the physicochemical soil properties and structure can be effectively improved in cooperation with planting of saline-alkali tolerant plants, the permeability is improved, and leaching of soil salt is facilitated; the technical problems that soil absorbs water and expands and pores are choked with silt due to soil granule dispersion after irrigation, mud is not permeable, salt is difficult to rapidly leach, soil shrinks and hardens when soil dries, and the migration speed of soil salt under the leaching condition is low are solved. The method is favorable to development and utilization of saline-alkali soil resources in China and has remarkable economic, social and ecological benefits.

The invention discloses a sea ice solid eccentric desalinating method, which comprises the following steps: adopting sea ice; filling ice halogenation compound; proceeding sea ice eccentric desalination; desalinating ice-crystal.