10results about How to "Reduce ion concentration" patented technology

The invention discloses an environmentally friendly electrolyte for preparing a high-density structure corrosion-resistant coating on the surface of a magnesium alloy, which is composed of the following components: 6g / L-9g / L of ammonium fluorozirconate, 4g / L of sodium dihydrogen phosphate, 1g / L of sodium fluoride, 1g / L-2g / L of sodium hydroxide, and the rest is deionized water; the application of the electrolyte of the invention includes: 1. pre-treating the magnesium alloy; 2. preparing a neutral zirconium salt system solution as an electrolyte; 3. preparing a high-density structure ZrO2-MgO corrosion-resistant coating on the surface of the magnesium alloy by micro-arc oxidation. The electrolyte of the invention improves the compactness and corrosion resistance of the ZrO2-MgO corrosion-resistant coating by controlling the composition and content of each component, reducing the ion concentration, avoiding the occurrence of ablation, reducing costs and reducing environmental pollution, and being green and environmentally friendly; the invention adopts micro-arc oxidation to prepare a corrosion-resistant coating with a continuous and dense structure, no through holes, and good corrosion resistance, thereby improving the preparation efficiency.

An overflow plate (7) is arranged between a dissolving tank (1) and a pumping tank (2), a latticed aeration pipeline (6) is arranged in the dissolving tank (1), a pump tank (3) is arranged at the bottom of the pumping tank (2), a slurry pump (8) is mounted in the pump tank (3), and an outlet of the slurry pump (8) is connected with a conveying pipeline (9); a pontoon (12) is arranged in the strip mine pit (4), the pontoon (12) is connected with a dosing pipeline (11), dosing holes are uniformly distributed in the surface of the dosing pipeline (11), and an outlet of the conveying pipeline (9) is connected with an inlet of the dosing pipeline (11) through a metal hose (10). According to the utility model, the pH value of the water body in the strip mine pit can be rapidly increased, the concentration of heavy metal ions is reduced, the usage amount of alkaline agents and flocculants during centralized treatment is reduced, and the operation cost of a centralized sewage treatment station is reduced.

The invention discloses an optimization method of a synchronous ultrasonic field low oxygen evolution overpotential zinc electrodeposition process. The method comprises the steps that a Pb-Ag alloy serves as an electrode, and a zinc electrodeposition electrolytic bath and an LSV testing electrolytic bath are built respectively; respectively electrifying the zinc electrodeposition electrolytic bath and the LSV test electrolytic bath for electrolysis, and applying a synchronous ultrasonic field to obtain an anode LSV curve; after electrolysis is finished, the anode is recycled, an electrodeposition oxidation layer film of the recycled anode is reserved, and an LSV curve of the electrodeposition oxidation layer film is obtained again; and repeating the steps to perform single-factor variable optimization on the zinc electrodeposition process parameters to obtain the optimal process conditions. According to the method, through a single-factor control experiment on variable factors in the zinc electrodeposition process, a correlation relation between each variable factor and an optimization effect is established by utilizing oxygen evolution overpotential and the ion concentration of an electrodeposition electrolyte, so that the optimal process condition is obtained in a targeted manner; the problems that in the prior art, in the zinc electrodeposition process of an anode, the oxygen evolution overpotential of the anode is high, the corrosion rate of lead and silver is high, and the zinc electrodeposition cost is increased are effectively solved.

The invention relates to the technical field of water treatment, and specifically discloses a CDI nanofiltration component and device for desalination by using a capacitive deionization enhanced separation membrane, comprising a membrane shell and a membrane core, wherein the membrane core is located inside the membrane shell; the membrane core comprises a filter membrane in a winding structure and a central tube arranged inside the filter membrane; the filter membrane comprises an insulating layer A, a current collector A, an anode plate layer, a guide plate A, a nanofiltration membrane layer A, a water production spacer, a nanofiltration membrane layer B, a guide plate B, a cathode plate layer, a current collector B and an insulating layer B which are stacked in sequence; a plurality of adsorption holes are provided on the anode plate layer and the cathode plate layer, the guide plate A is connected to the current collector A through the adsorption holes, and the guide plate B is connected to the current collector B through the adsorption holes; a spiral dirt cleaning part is rotatably provided on one side of the guide plate A and one side of the guide plate B. The invention has the characteristics of small concentration polarization, weak inorganic salt scaling and small desalination load.

The present invention relates to the field of chemical industry, and discloses a method for preparing low-ammonia nitrogen sodium persulfate, and specifically discloses a method for reducing ammonia nitrogen impurities in the sodium persulfate production process. The traditional electrolysis process uses ammonia nitrogen-containing compounds such as ammonium sulfate to improve the electrolysis efficiency, resulting in ammonia nitrogen impurities in the product, so that the quality of the prepared sodium persulfate product is not high. This process does not require the use of ammonium sulfate materials, has low cost, uses less materials, and has high electrolysis efficiency. The ammonia nitrogen content is further reduced by adding disodium hydrogen phosphate and magnesium sulfate, and recrystallization and purification are performed, so that high-quality sodium persulfate products with low ammonia nitrogen impurity content can be produced, and the ammonia nitrogen impurity content is far less than 0.0010%.

The invention discloses a method for synergistically preparing magnesium ammonium phosphate by coupling steel slag-steel mill sintering desulfurization wastewater with CO2 in-situ sealing. The method comprises the following steps: crushing, screening and drying steel slag; putting the pretreated steel slag into a reaction kettle, adding sintering desulfurization wastewater, raising the temperature, and introducing CO2 into the reaction kettle for reaction; after the reaction is finished, discharging gas in the kettle, cooling to room temperature, performing solid-liquid separation on a reaction product, and drying a solid; adding Na2HPO4 and MgCl2 into the filtrate to react, carrying out solid-liquid separation, and drying the solid to obtain magnesium ammonium phosphate; according to the method, comprehensive treatment and recycling of waste gas-waste residue-waste liquid in the field of steel smelting can be achieved, the carbon emission of a steel plant and the salt content of the waste water are reduced, meanwhile, the follow-up treatment difficulty of the sintering desulfurization waste water is reduced, products with added value are produced, and recycling of resources is fully achieved.

The embodiment of the present invention discloses a wafer tray structure and equipment, wherein the wafer tray structure includes: a tray bottom and an annular structure, the tray wall is an annular structure, and the annular structure is arranged at the edge of the tray bottom to limit the wafer; wherein an arc-shaped protrusion is arranged around the annular structure; when the wafer is placed on the tray bottom, the height of the arc-shaped protrusion is greater than or equal to the edge height of the wafer, which can prevent ion reflection at the edge of the wafer during the CVD process, effectively reduce the ion concentration, and ensure the uniformity of ion concentration at the edge and center of the wafer.

The present invention discloses a method for manufacturing a semiconductor device, belonging to the field of semiconductor technology. The manufacturing method comprises: providing a substrate, comprising a first region and a second region; forming a shallow trench isolation structure between the first region and the second region; forming a first patterned photoresist layer on the substrate with the long side of the opening parallel to the channel width direction of the semiconductor device, and exposing the first region and part of the shallow trench isolation structure on both sides; performing two tilted ion implantations on the first region to form a first channel doping region; re-forming a second patterned photoresist layer with the long side of the opening parallel to the channel width direction of the semiconductor device, and exposing the second region and part of the shallow trench isolation structure; performing two tilted ion implantations on the second region to form a second channel doping region; forming a gate on the channel doping region; and forming lightly doped regions on both sides of the gate. The manufacturing method of the semiconductor device provided by the present invention can improve the performance of the semiconductor device.

The invention relates to a coral sand crumb limestone similar material as well as a preparation method and application thereof. The coral sand crumb limestone similar material is prepared from the following components in parts by weight: A parts of calcareous sand, B parts of ground calcium carbonate powder, C parts of gypsum, D parts of cement, E parts of water, F parts of a cement foaming agent, G parts of borax, H parts of a gypsum retarder, B = 0-# imgabs 0 # A, D = # imgabs 1 # C-1. 5C, E = 0.125 (A + B) + 0.6 (C + D) + 50F, G = 0.004 D, H = 0.002C, A + B + C + D = # imgabs 2 # V and # imgabs 3 # 1.5-2.5. The properties including density, basic mechanical parameters and the like of the prepared coral sand grit limestone similar material are similar to those of real coral sand grit limestone, and the coral sand grit limestone similar material can meet the research requirements of various subjects and meet the requirements of a geotechnical engineering physical and mechanical model test technology.

This application relates to the field of ice-making equipment technology, and discloses an ice-making device and its control method. The ice-making device includes an ice-making module for making ice and a refrigeration system for providing cooling capacity for ice making. The method includes: during the continuous operation of the refrigeration system for ice making, in response to meeting a preset drainage trigger condition, controlling the execution of a water replacement operation, the water replacement operation including: draining at least a portion of the water in the ice-making module; and after draining, resupplying water to the ice-making module. This application can inhibit scale deposition and maintain unobstructed venting, and reduces the impact on the ice-making speed.