17results about How to "Improve desalination performance" patented technology

The invention relates to the technical field of saline-alkali soil improvement, and particularly discloses a preparation process and application of a multifunctional slow-release saline-alkali soil conditioner. The preparation process comprises the following steps: (1) uniformly mixing alginic acid powder, ardealite powder, carbon powder and water to form a wet material, then putting the wet material into a closed container, and carrying out heating and heat preservation treatment to obtain a precursor; and (2) standing the precursor at normal temperature, and then crushing the precursor to obtain the soil conditioner. The soil conditioner prepared by the process disclosed by the invention not only can more efficiently and quickly fix sodium, potassium, calcium and magnesium ions in soil, but also can reduce the content of carbonate ions, so that the salt content of the soil is reduced, and the alkalinity of the soil is reduced. In addition, the soil conditioner disclosed by the invention is also beneficial to relieving the alkali and salt returning phenomenon of the soil, and the use amount of the conditioner in the subsequent continuous soil improvement process is reduced.

The invention provides a Prussian blue composite nanomaterial and a preparation method and application thereof, the Prussian blue composite nanomaterial comprises an MXene material and Prussian blue hollow spheres, and the Prussian blue hollow spheres are loaded on the surface of the MXene material. Through the synergistic effect of the Prussian blue hollow spheres and the MXene, the Prussian blue composite nanomaterial has high conductivity and rapid ion transmission performance, and the desalting capacity, the rate and the cycling stability of the material are improved; and meanwhile, structural distortion caused by the ginger Taylor effect in the charging and discharging process can be relieved.

The invention relates to the technical field of capacitive deionization, in particular to an electrode for capacitive deionization and a preparation method thereof. The electrode for capacitive deionization comprises an electrode material, a carbon material and an adhesive, the electrode material is DHPZ, and a preparation method of the DHPZ comprises the following steps: S1, primary reaction: grinding and mixing 2, 5-dihydroxy-1, 4-benzoquinone and 2, 3-diaminophenazine, heating in inert gas, cooling, filtering, cleaning and performing vacuum drying to obtain a primary product; and S2, acidizing the primary product, namely mixing the primary product with 2mol / L nitric acid according to a mass-volume ratio of 1: 1, magnetically stirring for 5 hours, filtering, cleaning with deionized water, centrifuging for multiple times, and drying in vacuum at 60 DEG C for 15 hours to obtain the DHPZ. According to the electrode for capacitive deionization and the preparation method of the electrode, the problems that in the capacitive deionization related technology, the desalting capacity is low, and the adsorption capacity and the removal efficiency are not high are solved.

The invention discloses a pseudocapacitance behavior induced double-ion selective HCDI system based on MoS2 / PPy / / Ag (at) PANI / AC and application. MoS2 / PPy is used as a Na < + > intercalation cathode, and Ag modified polyaniline modified activated carbon (Ag (at) PANI / AC) is used as a Cl <-> capture anode in the HCDI system. In the system, hollow PPy nanotubes are anchored by ultrathin MoS2 nanosheets and are used as conductive chains to connect loose MoS2 nanoflowers, so that a three-dimensional flower chain network is formed. Ag (at) PANI / AC is synthesized by modifying Ag particles on a 3D electron conduction substrate formed by coupling PANI and AC. The MoS2 / PPy / / Ag (at) PANI / AC realizes the excellent adsorption capacity of 25.1 mg.g <-1 >, excellent desalination rate (5.88 mg.g <-1 >. Min <-1 >), good cycle stability (97.7% retention rate) and improved charge efficiency (56.2%), provides a feasible method for realizing more energy-saving HCDI, and can be used for seawater desalination and water purification desalination.

The invention relates to a post-treatment method of a polyamide desalination membrane material. The method comprises the following steps: dissolving a certain amount of transition metal salt and a small amount of citric acid in pure water to prepare a water solution with a certain concentration as a post-treatment solution A; dissolving a certain amount of hydrogen peroxide in pure water to prepare a hydrogen peroxide aqueous solution with a certain concentration, adjusting the pH value with diluted hydrochloric acid, and taking the hydrogen peroxide aqueous solution as a post-treatment solution B; the method comprises the following steps of: soaking the surface of a membrane by using a post-treatment solution A at room temperature, soaking the surface of the membrane treated by the post-treatment solution A by using a post-treatment solution B, draining the post-treatment solution after a certain time, cleaning the membrane by using a citric acid aqueous solution with a certain concentration, and cleaning the membrane by using pure water. The method disclosed by the invention is simple to operate and low in treatment cost, can effectively improve the desalination performance of the polyamide membrane material, and has a very good industrial application prospect.

The invention discloses composite separation membrane slurry and a preparation method thereof, a reverse osmosis composite membrane and application, and the preparation method comprises the following steps: dispersing SiO2 particles and a surfactant in water, and mixing to obtain SiO2 dispersion liquid; moS2 particles are uniformly dispersed in the SiO2 dispersion liquid, and a silicon-molybdenum mixed liquid is obtained; grinding the silicon-molybdenum mixed solution by using a colloid mill until the particle size of MoS2 particles is less than 500nm to obtain silicon-molybdenum slurry; and finally, filtering, cleaning and dispersing the silicon-molybdenum slurry to obtain the composite separation membrane slurry. The MoS2 is stripped into a porous sheet structure by adopting a colloid mill and utilizing extrusion and friction acting force among particles, and the reverse osmosis composite membrane prepared from the MoS2 has the advantages of large flux, high desalination rate, controllable pore diameter and good hydrophilicity, is beneficial for reducing desalination pressure, and can be applied to the fields of seawater desalination, saline-alkali water desalination, sewage desalination treatment and the like.

This utility model discloses a portable desalination device for metallic artifacts, belonging to the field of cultural relic protection technology. It includes a mobile frame with casters fixed to the bottom via spring shock absorbers. A desalination assembly is located on the top of the frame, comprising a desalination chamber, a lid, partition grooves, partition plates, threaded grooves, several connecting rods, and clamps. The desalination assembly, with its cross-shaped partition grooves and snap-fit ​​partition plates within the desalination chamber, allows for flexible adjustment of the internal space dimensions, adapting to metallic artifacts of different sizes and volumes, significantly improving the device's adaptability. Furthermore, the connecting rods mounted via the threaded grooves flexibly secure the clamps and a waterproof camera. The monitoring sensor probe within the clamps can acquire multi-dimensional data at different depths of the solution in real time, while the waterproof camera simultaneously records the artifact's condition, eliminating reliance on manual sampling and enriching parameter monitoring methods.

The utility model discloses a planting structure for ecological restoration of a salt wasteland by combining depth and depth, which sequentially comprises salt wasteland soil, a clay layer and an underground water level from top to bottom, a plurality of water delivery soil canals are sequentially excavated at intervals along the horizontal direction of the salt wasteland soil, the depth of the water delivery soil canals is above the clay layer, the longitudinal section of each water delivery soil canal is in an inverted trapezoidal shape, and the underground water level is in an inverted trapezoidal shape. A shallow hole is vertically and downwards excavated along the bottom wall of each water conveying soil canal, the depth of the shallow hole is larger than that of a clay layer, a plurality of deep holes are vertically and downwards excavated along side slopes on the two sides of each water conveying soil canal, and each deep hole penetrates through the clay layer to reach the underground water level. According to the planting structure for ecological restoration of the salt wasteland with the combination of the depth and the depth, the problems that the salt wasteland in an arid region is high in soil saline-alkali degree and large in ecological restoration difficulty are solved, particularly, water is effectively saved in a region with limited water resource quantity, and the desalting effect, the vegetation coverage and the vegetation growth speed of the salt wasteland are improved; the difficulty and the cost of ecological restoration of the salt wasteland are reduced.

The utility model provides a desalting device for chondroitin sulfate, and belongs to the technical field of chondroitin sulfate. The desalting device for chondroitin sulfate comprises a mixing tank, one side of the top end of the mixing tank is connected with a feeding port, the mixing tank is sleeved with a supporting ring, the bottom end of the supporting ring is provided with a supporting rod, the bottom end of the mixing tank is connected with a first electric valve, and the bottom end of the first electric valve is connected with a filtering box; the bottom end of the supporting rod is fixedly connected with the top end of the filtering box, an opening is formed in the bottom end of the first side of the filtering box, the inner side of the opening is slidably connected with a filtering frame, a sealing plate is arranged on the first side of the filtering box, one side of the filtering frame is fixedly connected with one side of the sealing plate, and a desalting filtering net is installed on the inner side of the filtering frame. According to the utility model, the desalting filter screen can be effectively prevented from being blocked in the filtering process, the filtering efficiency is improved, and the practical value is higher.

The invention discloses a saline-alkali soil precision desalination device, which relates to the field of soil technology. The upper front side of the desalination box is fixedly connected to the lower end of the pH detection box, and a quantity control chute is provided on the upper front side of the desalination box. The inner wall of the quantity control chute is slidably connected to the outer wall of one end of the quantity control frame, and the right side of the desalination box is fixedly connected to the lower end of the desalination box. The advantages of the invention are: for different soil conditions, the pH value of the saline-alkali soil can be quickly detected by the pH detection box, and the weight information support of the desalination block placed by the user is provided by using the quantity scale according to the corresponding relationship between the soil pH value and the soil salinity and alkali content, and the position of the quantity control plate and the quantity limit plate is controlled by the quantity control frame to adjust the weight of the placed desalination block, so that the device can be placed according to the actual demand. The corresponding number of desalination blocks is placed for precise desalination. Compared with the existing desalination equipment on the market, it can reduce the waste of desalination blocks and improve the utilization rate of desalination blocks.

This application discloses a calcareous sand desalination device, including a mixing tank containing calcareous sand, and further comprising a delivery assembly, a stirring assembly, a drive assembly, a transmission assembly, and a filtration assembly. The delivery assembly is used to deliver demineralized water into the mixing tank; the stirring assembly is disposed inside the mixing tank; the drive assembly is connected to the mixing tank to enable the mixing tank to rotate in a vertical plane; the transmission assembly is connected to the stirring assembly to agitate the calcareous sand and demineralized water while the mixing tank rotates; the filtration assembly is located below the mixing tank to separate the demineralized water and the desalinated calcareous sand. The aim is to improve the desalination effect on calcareous sand.

The kitchen garbage desalting device comprises a support, a desalting tank is fixedly installed on the support, a liquid discharging pipe is communicated with the bottom of the desalting tank, a discharging pipe is arranged in the desalting tank, the upper end of the discharging pipe is fixedly connected with a sealing cover, a pipe opening in the lower end of the discharging pipe penetrates through the desalting tank and then is connected with a belt conveyor, and the two ends of the discharging pipe are communicated with filter pipes respectively. A spiral shaft is arranged in the filter pipe, one end of the spiral shaft penetrates through the desalting tank and is in transmission connection with a speed reducing motor on the fixed mounting bracket, a feeding hopper is arranged at one end, far away from the discharging pipe, of the filter pipe, and a piston box is arranged in the discharging pipe and is connected with a pushing air cylinder mounted on the sealing cover. The kitchen garbage desalting equipment is used for solving the problem that existing kitchen garbage desalting equipment is poor in desalting effect.

The present invention discloses a high-pressure reverse osmosis membrane based on ε-caprolactam to accurately construct a polyamide network and a preparation method thereof. The preparation method of the high-pressure reverse osmosis membrane based on ε-caprolactam to accurately construct a polyamide network comprises the following steps: step 1, preparing an aqueous phase solution, and using the aqueous phase solution to completely infiltrate an ultrafiltration membrane; step 2, preparing an organic phase solution and then performing an interfacial polymerization reaction; step 3, drying and heat setting treatment; step 4, soaking the ultrafiltration membrane after drying and heat treatment in step 3 in an aqueous solution, and then rinsing the membrane surface with deionized water to obtain the high-pressure reverse osmosis membrane based on ε-caprolactam to accurately construct a polyamide network. The present invention innovatively proposes a method for preparing a high-performance high-pressure reverse osmosis membrane of "main chain linking-conformation adjustment-cavity construction". While maintaining an extremely high desalination capacity (≥99.70%, up to 99.78%), the permeate flux is greatly improved (up to 60L·m ‑2 ·h ‑1 ).

The present invention relates to a method for preparing a carboxylated polyaniline / phosphorus-doped graded porous carbon / MoS2 integrated membrane electrode, comprising the following steps: S1, preparation of phosphorus-doped graded porous carbon; S2, preparation of phosphorus-doped graded porous carbon / MoS2; S3, preparation of phosphorus-doped graded porous carbon / MoS2 electrode; S4, preparation of carboxylated polyaniline / phosphorus-doped graded porous carbon / MoS2 integrated membrane electrode. The present invention uses phytic acid with a high phosphorus content as a phosphorus source and F127 as a template to prepare phosphorus-doped graded porous carbon, thereby improving the pore structure and hydrophilicity of the carbon material and increasing pseudocapacitance; phosphorus-doped graded porous carbon is composited with MoS2 with a high specific capacitance, which can significantly improve the specific capacitance of the electrode material. The carboxylated polyaniline membrane is modified on the surface of the graded porous carbon / MoS2 electrode as an ion exchange membrane by a constant potential method to construct an integrated membrane electrode, which can significantly improve the electrode specific capacitance, hydrophilicity and ion exchange membrane selective permeability, thereby improving the desalination performance of MCDI in treating low-concentration uranium-containing wastewater.

The invention discloses electric desalting treatment equipment capable of fully desalting and a use method of the electric desalting treatment equipment, and relates to the technical field of electric desalting treatment. A controller is fixedly mounted at one end of the tank body, a commutator is fixedly mounted in the tank body, a fixing frame is fixedly mounted in the tank body on one side of the commutator, a rotating frame is rotationally mounted on the other side of the fixing frame through a bearing, an output shaft of the commutator is fixedly connected with the surface of the other side of the rotating frame, and a motor is fixedly mounted at the top of the tank body; an output shaft of the motor extends into the tank body and is connected with an output shaft of the commutator, and a plurality of gears are arranged in the rotating frame. Through mutual cooperation of the rack and the gear, the inclination angle of the stirring plate can be adjusted, so that the flowing paths of crude oil, fresh water and a demulsifying agent are changed, the mixing strength of the crude oil, the fresh water and the demulsifying agent is adjusted, and the desalting effect of electric crude oil is improved.

This application relates to the field of reverse osmosis membranes, specifically disclosing a highly stable, easily stored, low-pressure reverse osmosis membrane and its preparation method. The highly stable, easily stored, low-pressure reverse osmosis membrane comprises a polysulfone-based membrane and a polyamide functional layer. The polyamide functional layer is formed by an interfacial polycondensation reaction between an aqueous phase containing organic amines and an oil phase containing acyl chlorides. The aqueous phase also includes silane-modified aminopolyethylene glycol dopamine and an antioxidant. The reverse osmosis membrane of this application utilizes chemical crosslinking modification and the addition of antioxidants to avoid poor stability of the low-pressure reverse osmosis membrane during storage and performance degradation after the membrane is placed.

The invention relates to the technical field of reverse osmosis composite membranes, in particular to a high-temperature-resistant reverse osmosis membrane prepared based on acyl chloride graphene oxide and ultrasonic assistance and a preparation method of the high-temperature-resistant reverse osmosis membrane. According to the preparation method, acyl chloride and graphene oxide react to synthesize acyl chloride graphene oxide (GO-COCl), an isoparaffin solvent Isopar G serves as a dispersing agent to be added into an organic phase, meanwhile, an organic phase solution is subjected to ultrasonic-assisted treatment before interfacial polymerization, and GO-COCl is evenly dispersed in the organic phase; and finally, through interfacial polymerization of m-phenylenediamine (MPD) and 1, 3, 5-tribenzoyl chloride (TMC), the composite reverse osmosis membrane is prepared. According to the method, GO-COCl can be added into the PA layer instead of the surface or the substrate through crosslinking, acyl chloride in GO-COCl reacts with an amine monomer to form a polyamide chain, and meanwhile, an organic phase solution is subjected to ultrasonic dispersion before interfacial polymerization, so that a uniform GO-COCl sheet is clamped in the PA layer, and the surface of the PA layer is coated with the GO-COCl. The flux, the desalting performance and the stability of the composite reverse osmosis membrane are favorably improved.