1020 results about "Alkaline water" patented technology

The invention discloses a desalting membrane as well as a preparation method and application thereof, and relates to the technical field of membrane separation. The desalting membrane comprises a porous ultrafiltration base membrane and a functional layer formed on the surface of the porous ultrafiltration base membrane; the functional layer is formed by copolymerizing and cross-linking a polyamine monomer, a zwitterionic multi-element hydroxyl monomer and an acyl chloride monomer through an interfacial polymerization reaction. The preparation method comprises the following steps: providing the porous ultrafiltration base membrane; coating the surface of the porous ultrafiltration base membrane with an alkaline water-phase solution containing a polyamine monomer and a zwitterionic multi-hydroxyl monomer to form a water-phase solution layer; coating an oil-phase solution containing an acyl chloride monomer on the surface of the water-phase solution layer to form a functional layer; and performing heat treatment. The invention also provides application of the desalination membrane in any one of seawater desalination, brackish water desalination, wastewater treatment and material separation and concentration. According to the invention, zwitter-ion-based multi-hydroxyl monomers are introduced into water-phase monomers to participate in interfacial polymerization, and a super-hydrophilic nano-channel is constructed in a separation layer, so that the water flux and the desalination rate of the membrane are remarkably improved.

A method for efficiently and safely cleaning an apparatus for a tin compound and a highly purified apparatus for a tin compound are provided. A method of cleaning an apparatus that has been in contact with a tin compound having formula (1) includes at least steps (A) to (C) in this order:(A) a step of cleaning the apparatus with a non-protonic solvent,(B) a step of cleaning the apparatus with an acidic aqueous solution and / or alkaline aqueous solution, and(C) a step of cleaning the apparatus with ultrapure water having a resistivity of 17 MΩ·cm at 25° C.RpSnXm  (1)R is a hydrocarbon group, p is an integer of 0 to 3, X is a hydrolyzable substituent, and m=4-p.

The invention relates to the technical field of industrial process control, and discloses an intelligent optimization control method of an alkaline water hydrogen production system, which comprises the following steps: a controller synchronously acquires real-time voltage, current and temperature data of an electrolytic bath; theoretical reversible voltage is calculated according to a Nernst equation, ohm voltage drop is eliminated, and a bubble additional impedance value representing the bubble coverage degree is analyzed; performing differential processing on the change rate of the bubble additional impedance value to generate a flow feed-forward control instruction, combining a feedback control instruction based on temperature deviation to synthesize a target rotating speed instruction, and driving an alkali liquor circulating pump to adjust the flow speed; according to the method, the bubble impedance observation model is constructed, so that zero-delay sensing and decoupling control over the state of bubbles in the electrolytic cell are achieved, hysteresis of single temperature feedback is eliminated, and the problems of actuator saturation and model aging drifting are solved.

The invention provides a modified alkaline electrolytic water hydrogen production diaphragm and a preparation method thereof. The modified diaphragm comprises a base membrane loaded with a Cu < 2 + > complexed chitosan alkali-resistant ion conduction unit, and the Cu < 2 + > complexed chitosan alkali-resistant ion conduction unit is obtained by loading chitosan through the base membrane and soaking in a Cu < 2 + > complexed solution for complexing. By introducing a copper-chitosan complex structure, a stable ionic conduction channel is constructed in an alkaline environment, and the alkali resistance and ionic conductivity of the membrane are effectively improved. According to the modified alkaline diaphragm for hydrogen production by electrolysis of water, the problems of insufficient alkali resistance, limited ion transmission capability and the like of a diaphragm material in the prior art are solved, and a new solution is provided for preparing the diaphragm for hydrogen production by electrolysis of alkaline water with long service life, high efficiency and low cost.

Methods for preparing a salt of urolithin A and, in turn, urolithin A. Combining in an alkaline aqueous solution a copper-containing catalyst, 2-bromo-5-hydroxybenzoic acid, and resorcinol produces a salt of urolithin A. Urolithin A has been prepared by protonating a salt of the compound.

The invention belongs to the technical field of phosphoric acid purification, and particularly relates to a removing agent and a removing method for heavy metal cadmium in phosphoric acid. The removing agent comprises a solvent, a thiophosphoric acid trapping agent A and a thiophosphoric acid trapping agent B, wherein the thiophosphoric acid trapping agent A and the thiophosphoric acid trapping agent B are dispersed in the solvent; the thiophosphoric acid trapping agent A and the thiophosphoric acid trapping agent B are different types of thiophosphoric acid trapping agents and are respectively and independently selected from one of alkyl dithiophosphoric acid or salts thereof, phenolic dithiophosphoric acid or salts thereof and amino dithiophosphoric acid or salts thereof; and at least one hydrocarbyl dithiophosphoric acid or salt thereof is selected; the salt is sodium salt or ammonium salt; the solvent is water or an alkaline aqueous solution. According to the method, a composition of a dithiophosphoric acid trapping agent is used as a removing agent for cadmium in wet-process phosphoric acid, a precipitate which is insoluble in a strongly acidic water phase is generated after reaction, and phosphoric acid cadmium removal is realized after filtration. Compared with a conventional sulfide precipitation method, the method provided by the invention has the advantages of less cadmium residue in phosphoric acid and less pollution.

The invention relates to the technical field of saline-alkali soil improvement, and discloses a saline-alkali soil improvement system and method for combined control of agriculture, forestry, animal husbandry, planting, breeding and breeding, and the saline-alkali soil improvement system for combined control of agriculture, forestry, animal husbandry, planting and breeding comprises a first planting area; a drip irrigation assembly; a water seepage assembly; the drainage channel is arranged below the surface of the saline-alkali soil corresponding to the first planting area; and a first flow guide member. According to the method, salt-tolerant plants are planted in the saline-alkali soil, so that the infiltration capacity of water in the soil can be improved, and absorption and leaching of salt in the soil are promoted; the drip irrigation assembly is adopted to irrigate the salt-tolerant plants, and water molecule movement can bring salt in soil to the deep position of the soil, so that the salt return phenomenon caused by the capillary action of water molecules is avoided; by arranging the water seepage assembly, the movement speed and the conveying effect of saline-alkali water in soil conveyed to the drainage channel can be increased, and infiltration and collection of the saline-alkali water are accelerated; by arranging the drainage channel, saline-alkaline water in the soil can be absorbed and discharged.

The invention provides an arid region saline-alkali soil treatment method which comprises the following steps: step 1, region division: dividing saline-alkali soil into a planting region and a saline-alkali water collection and treatment region; 2, a planting area is constructed, the planting area is composed of an original layer, a first water drainage and salt guide layer, an air permeation prevention layer, a second water drainage and salt guide layer and a planting layer from bottom to top, the air permeation prevention layer can prevent salt from ascending, and the water drainage and salt guide layer can drain saline-alkaline water in soil; and step 3, constructing a saline-alkaline water collection and treatment area, and performing filtration and electro-adsorption salt reduction on the collected saline-alkaline water to realize recycling of the saline-alkaline water. Layered improvement of the planting area is combined with an integrated structure of saline-alkali water collection, ion adsorption and storage, the salt content of soil is reduced, the nutrient content of the soil is increased, and all-round treatment and utilization of'blocking ', 'discharging', 'treating 'and'using' of the saline-alkali water are achieved.

The present invention reduces the consumption of a solute used for generating alkaline water while using the alkaline water for efficiently separating carbon dioxide gas from exhaust gas, so as to reduce running costs. A separation device for carbon dioxide gas according to the present invention comprises: a steam generation part that heats alkaline water to a boiling point or higher and generates alkaline water steam; a mixing part that mixes the alkaline water steam with exhaust gas to form steam-mixed exhaust gas; a cooling part that cools the steam-mixed exhaust gas to form mist-containing exhaust gas containing mist in which the carbon dioxide gas is absorbed and which is formed by condensation of the alkaline water steam having absorbed carbon dioxide gas; a recovered water separation part that recovers, as recovered water from the mist-containing exhaust gas, the mist in which the carbon dioxide gas is absorbed; a vaporization part that heats and vaporizes the recovered water to form mixed gas which contains the carbon dioxide gas and the alkaline water steam; a gas separation part that filters the mixed gas with a gas separation membrane to separate the carbon dioxide gas and solute gas of the alkaline water; and a solute mixing part that dissolves, in water, the solute gas of the alkaline water to form alkaline water.

Provided is a water treatment device (1) for producing treated water by removing metal ions from water to be treated, the water treatment device comprising: an electrolytic cell (10) that includes an anode chamber (15) having an anode (12), a cathode chamber (16) having a cathode (13), and a membrane (14) that partitions the anode chamber and the cathode chamber and is capable of ion permeation, the electrolytic cell (10) producing acidic water and alkaline water from the water to be treated by electrolysis; a first conductivity measurement unit (70) that measures the conductivity of water circulated through the anode chamber; a second conductivity measurement unit (80) that measures the conductivity of water circulated through the cathode chamber; and a control unit (100) that controls the voltage or current between the anode and the cathode. The acidic water circulates through the anode chamber, and the alkaline water circulates through the cathode chamber. The control unit changes the voltage or current applied between the anode and the cathode on the basis of the conductivity of the water measured by the first conductivity measurement unit and the conductivity of the water measured by the second conductivity measurement unit.

The invention relates to an integrated experiment table system for measuring electrolytic performance and internal temperature of an alkaline water electrolytic bath. The integrated experiment table system comprises an environment box, the alkaline water electrolytic bath for experiments, a direct-current power supply, a hydrogen side gas-liquid separation bottle, an oxygen side gas-liquid separation bottle, a temperature measuring line, a paperless recorder and a constant-temperature water bath. The alkaline water electrolytic bath for experiments can change flow field design, small chamber scale, heat dissipation and bath body environment temperature control components so as to meet diversified experiment requirements. And the alkali liquor circulating pump is connected with the gas-liquid separation bottle and the electrolytic bath to realize alkali liquor circulation. And the computer terminal is in communication connection with the direct-current power supply, the paperless recorder and the alkali liquor circulating pump and is used for data collection and component control. The hydrogen-side gas-liquid separation bottle and the oxygen-side gas-liquid separation bottle have specific structures for gas-liquid separation and alkali liquor treatment. Compared with the prior art, the experiment table system is easy to disassemble and assemble, stable in operation, capable of decoupling key parameters and obtaining dynamic temperature data in the electrolytic cell, large in freedom degree and capable of guiding industrial hydrogen production strategy making and assisting related research and product research and development of the alkaline water electrolytic cell.

A raw material solution containing trivalent iron ions, or trivalent iron ions and ions of a metal element that partially substitutes Fe sites, and an alkaline aqueous solution for neutralizing the raw material solution are added to a reaction system to adjust the pH of the reaction system from 1.0 to 3.0 or lower. Hydroxycarboxylic acid is added to the obtained reaction solution and the pH of the reaction system is then neutralized from 7.0 to 10.0 or lower. The obtained precipitate of a substituent metal element-containing iron oxyhydroxide is coated with silicon oxide, followed by heating so as to form particles of ε-iron oxide in which Fe sites are partially substituted by other metal elements, and then, a slurry containing the particles is classified. The iron-based oxide magnetic powder has a particle shape close to a perfect sphere and is suitable for use in a magnetic recording medium.

The present invention provides an organic phosphonic acid betaine and a preparation method thereof, specifically an ammonium phosphonic acid betaine containing a glycidyl group. The organic phosphonic acid betaine can be used as a functional monomer for free radical grafting modification of the surface of a polymer material such as polyolefin, or can be mixed with acrylate, acrylonitrile or other olefin monomers for copolymerization to prepare an amphoteric ionomer. The organic phosphonic acid betaine can also be used for ring-opening grafting modification of polymer materials such as starch, cellulose, polyurethane, and polyamide containing amino or hydroxyl groups in their structures. At the same time, the phosphonic acid betaine imparts functional effects such as zwitterionization, hydrophilicity, antibacterial properties, and antifouling properties to the obtained polymer material. The organic phosphonic acid betaine also has high chemical stability in acidic and alkaline water environments.

The invention relates to the technical field of waterproof building materials, in particular to a waterproof building material. The waterproof building material is prepared from the following raw materials in parts by weight: 80-100 parts of cement, 8-15 parts of modified montmorillonite, 5-8 parts of modified konjac glucomannan, 3-5 parts of a fiber reinforced material, 1-3 parts of a coupling agent, 1-3 parts of a dispersing agent and 0.1-0.5 part of a defoaming agent. According to the invention, through the synergistic effect of various raw materials, after the montmorillonite is modified, the interlayer spacing is increased, the hydrophilicity is weakened, a nano-scale sheet-shaped barrier layer can be formed in a cement matrix, like countless tiny shields, and water molecule permeation is effectively blocked, and the modified konjac glucomannan has good water resistance in an alkaline cement environment. The water-proofing agent has a cross-linking reaction with hydrated calcium silicate and calcium hydroxide of cement to form a continuous gel network structure to fill pores and capillary channels in set cement and cut off water seepage channels, so that a good water-proofing effect of a building in a long-term humid environment is ensured.

The invention belongs to the technical field of new energy and electrochemistry, and particularly relates to a corrosion-resistant structured transition metal alloy electrode suitable for hydrogen production from alkaline water and a preparation method of the corrosion-resistant structured transition metal alloy electrode. The method comprises the following steps: sequentially carrying out sand blasting treatment and electrochemical activation treatment on a nickel net substrate so as to improve the surface roughness and the number of active sites; and then performing constant-current deposition in an electro-deposition solution containing nickel salt and ferric salt and / or cobalt salt, and constructing a nickel-based alloy catalyst layer in a micron array shape to obtain the alloy electrode. Through observation of a scanning electron microscope, the surface of the obtained electrode has a sphere-like microstructure, the arrangement is compact, and the catalytic efficiency and durability can be improved. The prepared structured alloy electrode has the advantages of being high in interface bonding force, high in electro-catalytic performance, high in alkali corrosion resistance and the like, and is suitable for efficient and long-term operation of hydrogen production through alkaline electrolysis of water.

The embodiment of the invention provides a device and a method for detecting the sealing performance of an electrolytic cell. The device comprises an air source, a first air delivery pipe, a second air delivery pipe, a first on-off valve, a second on-off valve, a pressure release valve and an air pressure meter, the first gas conveying pipe and the second gas conveying pipe are communicated with a gas source in parallel, the first gas conveying pipe is used for conveying gas to the electrolytic cell anode, and the second gas conveying pipe is used for conveying gas to the electrolytic cell cathode; the first on-off valve is arranged on the first gas conveying pipe, the second on-off valve is arranged on the second gas conveying pipe, at least one of the first gas conveying pipe and the second gas conveying pipe is provided with a pressure release valve, and at least the other one of the first gas conveying pipe and the second gas conveying pipe is provided with a gas pressure meter; the liquid conveying assembly communicates with the cathode side and / or the anode side of the electrolytic cell and conveys detection liquid to the cathode side and / or the anode side of the electrolytic cell. The detection device provided by the embodiment of the invention not only can measure the internal sealing leakage rate of the electrolytic bath, but also can measure the external sealing leakage rate, enriches the testing function, and is particularly suitable for measuring the internal sealing leakage rate of the alkaline water electrolytic bath.

The invention relates to a preparation method of a multilayer alloy net electrode for hydrogen production by alkaline electrolysis of water and the multilayer alloy net electrode, and the preparation method comprises the following steps: firstly, selecting an alloy electrode net material, then etching the alloy electrode net, and carrying out electrochemical etching by taking the alloy electrode net as an anode and an inert electrode as a cathode and using 0.5-5M acid liquor to prepare the multilayer alloy net electrode. The preparation method comprises the following steps: sequentially overlapping a first layer of pure nickel net with the mesh number of 80-200 and a second layer of etched alloy electrode net with the mesh number of 40-80 and a third layer of etched alloy electrode net with the mesh number of 20-40, carrying out vacuum sintering at 800-1400 DEG C for 2-5 hours, and finally stirring and drying in a polyethyleneimine aqueous solution. Compared with the prior art, the obtained electrode has the advantages of being low in cost, high in catalytic activity, fast in bubble removal, high in durability and stability and the like, effectively solves many problems of an existing alkaline water hydrogen production electrode, has a wide application prospect in the field of alkaline water electrolysis hydrogen production, can remarkably improve the water electrolysis efficiency and is beneficial to large-scale industrial production.

The utility model relates to a small chamber internal part structure for improving the efficiency of a high-voltage alkaline water electrolytic bath. The internal part structure comprises a pole frame, a bipolar plate, an electrode, a diaphragm, a gasket and an elastic element, an electrode plate is arranged in the electrode frame, the electrode comprises an anode and a cathode, and the electrode plate, the anode, the diaphragm, the cathode and the electrode plate are stacked in sequence; the electrode plate is provided with a one-way mastoid structure facing one electrode to serve as a rigid support, the one-way mastoid structure forms a concave structure on the other side of the electrode plate, an elastic element is arranged between the concave structure of the electrode plate and the other electrode to serve as a flexible support, and the elastic element and the mastoid structure press and attach the electrodes to the two sides of the diaphragm. Compared with the prior art, the contact between the polar plates and the electrodes and the contact between the electrodes and the diaphragms are increased, so that the compact structure of the electrolytic cell is ensured, the cell pressure of the small electrolytic chamber is reduced, the elasticity of the whole structure is enhanced, and cathode and anode gas channeling caused by the fact that the diaphragms are punctured is prevented.

The invention discloses a resourceful treatment method and a resourceful treatment system for removing silicon and fluorine from wastewater in the photovoltaic industry, which are characterized in that alkaline water in photovoltaic wastewater and other photovoltaic wastewater are respectively collected through an alkaline water collecting tank and a fluorine-containing wastewater regulating tank, and the alkaline water reacts with lime milk in a dosing tank to form calcium silicate sludge; the calcium silicate sludge enters a calcium silicate pickling tank and is subjected to pickling by a hydrochloric acid solution to generate a calcium chloride solution, and the calcium silicate sludge with the purity meeting the resource recycling requirement is obtained; clear water obtained after reaction in the chemical adding pool and other photovoltaic wastewater are mixed and enter the two-stage fluorine removal system together for fluorine removal treatment, fluorine ions and calcium ions are combined to form calcium fluoride sludge, the fluorine concentration of effluent of the two-stage fluorine removal system is lower than 8 ppm, and the effluent reaches the standard and is discharged. Meanwhile, resource recycling of calcium fluoride and calcium silicate sludge is realized.

The invention relates to the technical field of green hydrogen production, in particular to a green hydrogen production system coupling biomass electrooxidation and water reduction, which comprises a pretreatment unit, a photovoltaic power generation unit and an electrolytic bath, the pretreatment unit is used for dissolving a polyhydroxy compound in an alkaline aqueous solution to form an alkaline electrolyte containing the polyhydroxy compound; the photovoltaic power generation unit is used for providing electric energy for the electrolysis process in the electrolytic cell, the electrolytic cell comprises a shell, an ion exchange membrane, an anode plate and a cathode plate, the ion exchange membrane divides the shell into an anode chamber and a cathode chamber, the anode plate is electrically connected with the positive electrode of the photovoltaic power generation unit, and the cathode plate is electrically connected with the negative electrode of the photovoltaic power generation unit. The shell is provided with a seawater inlet and a hydrogen outlet which are communicated with the cathode chamber, and the shell is provided with a compound inlet and a chemical outlet which are communicated with the anode chamber. According to the scheme, chemicals are obtained from the anodes, the safety is high, the cell voltage needed for driving the whole electrolysis process is greatly reduced, and the energy consumption of the whole electrolysis hydrogen production process is small.

Described herein are methods for making alkenyl disiloxanes, comprising combining an alkenyl halosilane with an alkyl halosilane and adding the mixture to water, an acidic aqueous solution, or a basic aqueous solution. The ratio of the alkenyl halosilane to the alkyl halosilane is about 10:1 to about 1:10. The alkenyl halosilane and the alkyl halosilane are mixed at about 20° C. to about 45° C. The reaction product is separated and washed with saturated alkali carbonate solution.

The invention provides a soil improvement and saline-alkali water spray irrigation method suitable for a saline-alkali beach. The method comprises the following steps: reclamation and field building, dike building and tide blocking: building and enclosing a mud flat area needing reclamation and planting in the earlier stage to prevent further erosion of saline-alkali water; constructing water guide systems such as a reservoir and a drainage ditch; after the soil is slightly aired, turning over and loosening the soil in the beach area, doping desulfurized gypsum (calcium sulfate), charcoal and a high-molecular water-retaining material into the soil, and fully mixing and uniformly stirring to form a water-retaining layer and provide nutrition for vegetation; sowing the seeds in a planting area according to the density requirement; finally, spraying a layer of macromolecular binding material on the surface to prevent weathering and saline-alkaline water erosion and slow down migration of salt to the planting layer; during irrigation, red soil is poured into the reservoir, saline-alkali water is introduced for stirring and standing for a period of time, then mixed muddy water is used for irrigation, and sprinkling irrigation is adopted for irrigation so as to slow salt infiltration into the earth surface; when the rainfall period is up, rainwater can be used for watering and washing off salt crystals on the earth surface. According to the method, rich mud flat resources in China are fully developed and utilized, the saline-alkali water serves as an irrigation water source, the problems of complex water diversion, troublesome salt leaching, fresh water deficiency, too high cost and the like of a traditional method are solved, the land utilization benefit and the agricultural production level are greatly improved, and the influence of salt on plants is relieved; the restoration of the ecological environment and the improvement of the agricultural production level are promoted.

The invention discloses an alkaline water electrolysis hydrogen production operation boundary evaluation method considering hydrogen content constraint in oxygen, and relates to the technical field of water electrolysis hydrogen production. The method comprises the following steps: analyzing a generation mechanism of gas crossing in an alkaline water electrolytic cell, according to steady-state and dynamic models of HTO gas crossing caused by diaphragm permeation and alkaline liquor mixed circulation in the electrolytic cell, and based on structural parameters represented by the volume of a gas-liquid separator and operating parameters such as working pressure, temperature, electrolyte circulation flow and the like of the electrolytic cell; the method comprises the following steps: analyzing the influence of different parameters on HTO impurity accumulation, quantifying the sensitivity coefficient of each parameter on HTO accumulation, predicting an HTO accumulation trajectory through a model, determining the safe operation range of different parameters, determining the safe operation boundary of alkaline water electrolysis hydrogen production, and constructing a parameter priority regulation and control method based on sensitivity ranking under a given operation condition. And pressure-flow-temperature parameters are determined for cooperative adjustment under the dynamic working condition, and the HTO concentration overrun risk is inhibited in real time.

The invention relates to the technical field of concrete 3D printing, in particular to modified alkali-resistant regenerated glass fiber reinforced concrete and a preparation process thereof, and the modified alkali-resistant regenerated glass fiber reinforced concrete is prepared from the following components in parts by weight: 600-650 parts of cement, 90-100 parts of fly ash, 30-35 parts of silica fume, 500-600 parts of river sand, 0.5-6 parts of modified alkali-resistant regenerated glass fibers, 10-15 parts of a water reducing agent and 120-200 parts of water. According to the invention, the regenerated glass fiber obtained by recovering the waste fan blades is used as a reinforcing material of the concrete, so that the resource consumption can be effectively reduced, and the carbon emission is reduced; the invention provides a surface modification method aiming at regenerated glass fibers, so that the long-term durability of the regenerated glass fibers in an alkaline cement matrix is enhanced, the generation of microcracks on a fiber and cement interface is reduced, and the constructability and excellent mechanical properties of the 3D printing concrete are improved. The method not only meets the requirements of digital and intelligent transformation and upgrading of the building industry, but also provides a new method for recycling of waste resources and sustainable development of the building industry, and has relatively high economic and environmental benefits.

A resist underlayer film, which, while exhibiting excellent resistance to a resist developer which is a resist solvent or an alkaline aqueous solution, exhibits removability, and preferably solubility, only in wet etching chemicals. This composition for forming a resist underlayer film contains a solvent, a heterocyclic compound having a dicyanostyryl group, a cyclic compound including an amide group, for example, and the reaction product of a heterocyclic compound precursor having an epoxy group and an active proton compound, for example.

A chemically amplified negative resist composition containing (A) a base polymer containing a polymer which contains a repeat unit having formula (A1) and a repeat unit having formula (A2), the polymer being adapted to decrease its solubility in an aqueous alkaline solution under an action of an acid.

The invention relates to the field of soil improvement, and particularly discloses a soil improvement method for coastal saline-alkali soil. According to the method, a physical method and a biological method are comprehensively utilized for comprehensive treatment of the saline-alkali soil, the large drainage ditch communicated with the surrounding river channel is dug for discharging salt into the river channel, the soil tank and the salt drainage ditch are dug, the plastic permeable blind pipe wrapped with the non-woven fabric is placed in the salt drainage ditch, the salt drainage ditch is backfilled with gravel, and the soil tank is backfilled with planting soil; organic compound fertilizer is evenly sown on the surface of the improved area, after long-time natural rainfall and manual watering, flowing water dissolves salt and alkaline substances in planting soil to form saline-alkaline water, and the saline-alkaline water flows into the plastic permeable blind pipe through the gravel layer and is finally discharged into the large drainage ditch to flow into the river channel. Salt and alkaline substances in the soil above the salt elimination ditch are effectively reduced, the wet soil promotes rapid decomposition of organic fertilizer and effective removal of salt, the improvement time of the saline-alkali soil is effectively shortened, and a good improvement effect can be maintained for a long time.

The invention discloses a novel composite diaphragm for an alkaline water hydrogen production electrolytic cell and a preparation method. By optimizing component selection, proportion and temperature of first to fourth coagulating baths in the phase inversion process, diaphragm phase inversion kinetics is regulated and controlled, a finger-free uniform spongy pore structure is formed, and zirconium oxide surface distribution is improved. The average pore size of the prepared composite diaphragm is 0.08-0.1 mu m, the surface resistance is less than or equal to 0.22 omega.cm < 2 >, the mechanical strength is high, and the durability is good. The method solves the problems that an existing composite diaphragm is high in finger-shaped hole proportion and large in surface resistance, can be used for separating a cathode and an anode of an alkaline water hydrogen production electrolytic cell, isolating gas products and conducting ions, and improves the electrolytic efficiency.

The invention discloses a method for preparing a roadside support filling body from coal gasification ash solid waste, and belongs to the technical field of coal-based solid waste resource utilization. The roadside filling body is formed by mixing coal gangue, coal gasification ash coarse slag, coal gasification ash fine slag and alkaline water; coal gangue serves as coarse aggregate, coal gasification ash coarse slag serves as fine aggregate, and the coal gasification ash fine slag is activated to replace cement to serve as a cementing material. The coal gangue, the coal gasification ash coarse slag, the coal gasification ash fine slag and the alkaline water are mixed to prepare the roadside filling body cementing material, other cementing materials and aggregates do not need to be added, after curing is conducted for 28 days, solidification of filling slurry is achieved through the activation characteristic of the coal gasification ash, and the performance of the filling slurry meets the performance requirement of the roadside filling material. The method is low in material cost, large in solid waste disposal amount and good in environmental benefit, a new way is provided for disposal of solid waste such as coal gasification ash, and sustainable development of the coal industry can be promoted.

The invention relates to a simulation analysis-based alkaline electrolytic cell stretching net flow channel optimization method. The method comprises the following steps: 1, establishing a zero-clearance stretching net flow channel alkaline electrolytic cell numerical simulation model; 2, a free tetrahedral mesh is adopted to divide a computational domain, a boundary layer mesh is divided near a flow boundary, and angle refinement is set in a whole flow area to encrypt the density of the mesh; 3, initializing an electric field; 4, calculating a flow field; 5, thermal field calculation; 6, post-processing a result; 7, analyzing the influence of different stretching net structures on the working characteristics of the alkaline water electrolyser through multi-physics field coupling simulation, and optimizing the design scheme on the experimental basis; according to the method, the tensile net alkaline electrolytic cell model is established, the electrochemical field, the flow field and the thermal field are distributed and coupled, the reaction gas production process is simplified through the step function, the simulation calculation amount is reduced, the model convergence is better improved, the method acts on tensile net flow channel structure optimization, and the performance of the tensile net flow channel alkaline electrolytic cell is improved.