14results about How to "Good desalination effect" patented technology

The invention relates to high-low-lying saline-alkali soil conversion and migration equipment and a conversion and migration method, the high-low-lying saline-alkali soil conversion and migration equipment comprises a blocking ditch arranged between a high land and a low-lying land, a drip irrigation pipe is buried in the high land, and a migration permeable pipe extending into the blocking ditch is buried in the low-lying land; the aeration rods are inserted into the impervious layer of the low-lying land at intervals. In the application, through the design of the blocking ditches, water sources in rainy seasons can be collected and gathered, flushing water resources of the low-lying land can be recycled in the treatment process, water consumption of the low-lying land and the high land is neutralized, and waste of the water resources is reduced; and when the low-lying land is preliminarily treated, an impervious layer is destroyed by adopting heat energy and an aeration mode, the permeability of soluble salt and alkali is enhanced, and an efficient and reliable treatment mode is provided. In addition, the invention further provides a conversion and migration method, by means of the method, the use amount of water resources can be reduced, desalination and water supplement are subjected to balanced treatment, and the treatment and irrigation requirements are met.

This invention belongs to the field of polymer material preparation technology, specifically relating to a method for preparing polysulfone resins via segmented polymerization. This invention provides a novel segmented polymerization method for polysulfone resins, dividing the polymerization reaction into two parts: a prepolymerization reaction and a post-desalting polymerization reaction. The prepolymerization reaction employs either an excess of phenolic monomers or an excess of halogenated monomers. After the initial salt-forming reaction of the phenolic and halogenated monomers, desalting is performed. At this point, the viscosity is low, making it easier to separate the salts from the prepolymer. This solves the problem in one-step synthesis methods of polysulfone resins where the resin viscosity increases after the formation of the polymer, making it difficult to effectively remove salts and small polymer molecules trapped within the polymer. This improves the quality of the polysulfone resin. Simultaneously, after salt removal, the polymerization system approaches homogeneity, significantly increasing the reaction rate and enabling controlled polymerization of ultra-high molecular weight polymers without cross-linking or explosive polymerization.

The invention relates to the technical field of reverse osmosis membranes, and particularly discloses an MOF / polyamide composite membrane and a preparation method and application thereof.The preparation method comprises the following steps that the surface of a flexible porous polymer base membrane is coated / immersed in a polymer-metal complexing aqueous solution, metal ions are evenly attached to the surface of the flexible porous polymer base membrane, and a polymer membrane rich in the metal ions is obtained; immersing the polymer film rich in metal ions in a metal-ligand mixed aqueous solution to obtain a continuous and complete MOF layer attached to the surface of the polymer film rich in metal ions; the MOF layer is in contact with a water phase solution of polyamine, the MOF layer is in contact with an organic phase solution of acyl chloride monomers after cleaning, polyamide interfacial polymerization reaction is completed in a confinement space, and a composite membrane is obtained; and carrying out heat treatment on the composite membrane to obtain the MOF / polyamide composite membrane. According to the MOF / polyamide composite membrane, no selective defect is eliminated in the membrane, the structure of the composite separation layer is regulated and controlled, and the MOF / polyamide composite membrane has good desalting performance and good application prospects.

The invention discloses an improvement method for promoting growth of plants in salinized soil in Hexi region. The improvement method is realized by two steps of preparation of a soil conditioner and planting of salt-tolerant plants. The soil alkali-hydrolyzable nitrogen content of other plants except T2 is 1.2-2.5 times of the soil alkali-hydrolyzable nitrogen content of T0, the soil available phosphorus content of other plants except T5 and T6 is reduced by 12.9%-62.8%, and the reduction amplitude of the soil available phosphorus of T1 and T9 is maximum. The content of rapidly available potassium in soil is reduced by 28.8%-77.6% by planting plants, and the reduction amplitude of rapidly available potassium in T4 soil is maximum. After plants are planted, the salt content of plough layer soil is reduced by 27.8%-33.6%, and the reduction effect of T5 is the maximum; by means of planting of the salt-tolerant plants, the salt content of the soil of the 30-60 cm soil layer is reduced by 17.0%-37.3%, and T2 is reduced most obviously. The method has the advantages that obvious desalting effects can be realized during planting of the plants, the desalting rates of the plough layer soil can reach 13.3%-20.3%, and T5, T2, T3 and T1 are 20.3%, 16.2%, 15.5% and 15.1% respectively.

The invention discloses a method for removing trace chloride salts in aminosilane, comprising the following steps: S1 provides a resin fixed bed, wherein an ion exchange resin is fixed in the resin fixed bed; S2 passes crude aminosilane liquid into the resin fixed bed through a sealed pipe, allowing the aminosilane liquid to flow through the fixed bed and fully contact with the resin inside; S3 receives the aminosilane liquid flowing out of the resin fixed bed, and obtains a crude aminosilane product whose chlorine content meets the electronic grade standard. The invention has simple process technology, strong stability, wide applicability, and is convenient and easy to operate, which can match the existing synthesis and purification process, and adopts a sustainably regenerated weakly alkaline anion exchange resin, which has excellent desalination effect and is economical and environmentally friendly.

The invention discloses a sulfur-oxygen bond-containing polymer as well as a preparation method and application thereof, and belongs to the technical field of capacitive deionization. The preparation method comprises the following steps: under the protection of inert gas, mixing a sulfur-oxygen bond-containing compound, a tetraketone compound, an initiator and an organic solvent, reacting in reflux, heating and stirring states, cooling to room temperature after the reaction is completed, centrifuging and washing to obtain a solid product, namely the sulfur-oxygen bond-containing polymer. According to the sulfur-oxygen bond-containing polymer as well as the preparation method and the application thereof, the polymer synthesized by reacting the sulfur-oxygen bond-containing compound and the tetraketone compound has a plurality of sodium ion active sites, so that the embedding of sodium ions is facilitated, and the purpose of adsorbing the sodium ions from seawater is achieved.

The invention discloses a coal-based hollow carbon fiber membrane and a preparation method and application thereof, and belongs to the technical field of water treatment.The preparation method comprises the following steps that according to the injection speed ratio of a shell layer spinning solution to a core layer spinning solution being 18: (1-6), a hollow fiber precursor is collected on an aluminum foil through a coaxial electrostatic spinning method, and the hollow fiber precursor is obtained; and then sequentially carrying out air low-temperature pre-oxidation and high-temperature carbonization treatment under inert gas to obtain the coal-based hollow carbon fiber membrane. Wherein the shell spinning solution contains oxidized coal and polyacrylonitrile; the core layer spinning solution contains polystyrene. The coal-based hollow carbon fibers with different inner diameters are prepared by fixing the injection speed of the shell layer spinning solution and adjusting the injection speed of the core layer spinning solution; the carbon fiber membrane with the hollow structure has a larger specific surface area and can provide more active sites, so that the deionization capacity and the deionization efficiency are improved; the oxidized coal modified hollow carbon fiber can be used for preparing a binder-free electrode material, the use of non-active materials is reduced, a three-dimensional conductive network is constructed to improve the conductivity of the electrode, meanwhile, the structural integrity of the electrode under the action of mechanical stress is enhanced, and the cycle service life of the electrode is remarkably prolonged.

The utility model relates to the technical field of desalting and filtering devices, in particular to a drum-type protein desalting device which comprises a box body, a drum with a horizontal central axis is arranged in the box body, the drum consists of a drum body and a drum cover, the drum body comprises an inner drum and an outer drum, the drum bottoms of the inner drum and the outer drum are fixed, and the top openings of the inner drum and the outer drum are in the same direction and are flush with each other; a gap exists between the inner cylinder and the outer cylinder, and filler is placed in the gap. Filtering holes are uniformly distributed in the surfaces of the inner cylinder and the outer cylinder; the opening side of the cylinder body is connected with a cylinder cover, and a gear is arranged on the cylinder cover. According to the utility model, the filler is arranged between the two drums of the roller, and the filter holes are formed in the two drums, so that on one hand, the filler is arranged between the two drums to play a role in limiting and protecting, and the deformation and random accumulation of the filler are avoided; and on the other hand, the gear transmits power to be matched with the roller to rotate, the whole inner wall of the inner cylinder is converted into a filtering surface, and the rotation is ingeniously applied, so that the filtering contact area is greatly increased, the filtering efficiency is improved, and the protein desalting effect is further improved.

The invention provides a purification process method of a reactive dye. The purification process method specifically comprises the following steps: (1) a color paste pretreatment process; (2) ultrafiltration desalination process; (3) concentration treatment process; and (4) content detection. The ultrafiltration membrane is used for desalting the dye, the problems that the efficiency is low and sulfate ions cannot be effectively intercepted when a nanofiltration membrane is used for desalting are solved, meanwhile, in the application, the ultrafiltration membrane is negatively charged, the reactive dye generally contains acid groups and is negatively charged, the electrostatic repulsive force is strong, the retention rate of the dye is high, and the dye retention rate is high. And the membrane has good anti-pollution performance. Besides, the low-pressure and high-pressure technological process is adopted, and the dye is concentrated at a specific node, so that different ion impurities of the reactive dye are subjected to an optimal desalting effect, meanwhile, the concentration treatment is realized by stopping the water replenishing operation, the operation is simple, other concentration equipment does not need to be replaced, the cost is saved, and the working efficiency is high.

A long-lasting antifouling polyamide reverse osmosis membrane, its preparation method, and its applications are disclosed, belonging to the field of membrane separation technology. The membrane comprises a porous support layer and a polyamide selective layer on its surface. The polyamide selective layer is covalently grafted with monoamine-terminated hyperbranched polyglycerol. The monoamine-terminated hyperbranched polyglycerol is grafted into the polyamide network through the reaction of its terminal primary amine groups with acyl chloride monomers during interfacial polymerization. This enriches the multi-hydroxyl branched structure of the hyperbranched polyglycerol on the membrane surface, forming a stable hydrophilic antifouling structure. The aforementioned long-lasting antifouling polyamide reverse osmosis membrane, its preparation method, and its applications result in a membrane with long-lasting and stable antifouling performance, strong hydrophilicity, and a simple preparation process, making it easy to industrialize.

The invention relates to the field of capacitance desalination, and discloses a desalination material containing ruthenium and titanium as well as a preparation method and application thereof. The method comprises the following steps: S1, carrying out anodic oxidation treatment on a titanium sheet to obtain a titanium dioxide nanotube array; s2, performing electrochemical deposition on the titanium dioxide nanotube array by using a Ru-containing deposition solution to obtain a Ru-loaded titanium dioxide nanotube array; and S3, calcining the titanium dioxide nanotube array loaded with the Ru. The preparation method is simple and efficient, and the prepared electrode material has a large specific surface area, good conductivity and high ruthenium loading capacity, shows good desalting performance in the desalting process, still keeps good desalting capacity after multiple desalting-desorption processes, has stable chemical performance, and can be applied to the field of electrochemical devices. The method has important significance in the actual production process.

The invention relates to a preparation method of a chlorine-resistant nanofiltration membrane and the chlorine-resistant nanofiltration membrane prepared by the preparation method. The method comprises the following steps: preparing a base film; the base membrane is sequentially contacted with an aqueous phase solution containing amine monomers and an organic phase solution containing acyl chloride monomers, the amine monomers comprise piperazine substances and pyrimidine substances with more than two amino groups, and the acyl chloride monomers comprise acyl chloride monomers with more than three acyl chloride groups; placing the base membrane after contact in an environment with a temperature of 10-30 DEG C, and spraying an aqueous solution containing a dialdehyde cross-linking agent; treating in an environment at the temperature of 40-80 DEG C; and post-processing. The method is low in production cost, high in production efficiency and simple and easy to operate, existing equipment does not need to be modified, and the chlorine-resistant nanofiltration membrane prepared from the method is low in use cost, easy to maintain, excellent in desalination performance, permeability and chlorine resistance and excellent in performance stability under long-term operation.

The utility model relates to the field of vegetable processing, concretely relates to a desalination device for pickled vegetable production, including desalination pool, the lower extreme of desalination pool is provided with drainage valve, the outside of desalination pool is provided with elevating stand, and elevating stand rotationally connects with door type frame, and the horizontal setting of door type frame is rotationally provided with net cylinder, and the both ends of net cylinder are conical and are provided with feeding pipe and discharge pipe respectively, and door type frame is provided with the drive mechanism connected with net cylinder, and the inside lower extreme of desalination pool is provided with multiple high -pressure air -jet pipes with the opening upwards, and high -pressure air -jet pipe all is provided with check valve, and the outside of desalination pool is provided with the gas pipe connected with high -pressure air -jet pipe all, and gas pipe is connected with high -pressure gas supply mechanism. The utility model has the advantages of uniform desalination, and the good desalination effect.

The invention discloses a Prussian blue stepped cubic framework / polypyrrole composite electrode material and a preparation method and application thereof.The composite electrode material comprises a cubic Prussian blue framework, granular polypyrrole and dendritic polypyrrole, and the granular polypyrrole adheres to and grows on the surfaces of the Prussian blue cubic framework and the dendritic polypyrrole; the dendritic polypyrrole is connected between the cubic Prussian blue frameworks. In the invention, under the combined action of a cubic Prussian blue framework and polypyrrole, a multi-dimensional structure can be formed by means of adhesion growth, series connection and the like, so that the composite material shows very excellent oxidation-reduction activity and conductivity; the composite electrode has the advantages of large electrolyte contact area, multiple active sites, proper Na < + > diffusion path, good conductivity, good structural stability and the like, can remarkably promote the desalination performance of the electrode when being used for preparing the capacitive deionization electrode, can promote the wide application of the electrode in the field of seawater desalination, and is high in use value and good in application prospect.