16 results about "Corrosive chemical" patented technology

The utility model relates to the technical field of pipes, and discloses a corrosion-resistant nickel alloy pipe which comprises a pipe body, and installation plates are installed at the two ends of the pipe body. A nickel alloy layer is arranged in the pipe body, and a heat preservation layer is arranged on the outer layer of the nickel alloy layer. The protective layer is made of PVC materials and protects the surface of the pipe body, the anti-corrosion paint can improve the corrosion resistance of the surface of the pipe body and prevent the surface of the pipe body from being corroded by rainwater, and therefore the service life is prolonged, the heat preservation layer is filled with the glass wool, heat preservation can be conducted on the pipe body, heat dissipation is reduced, and the ceramic layer is provided with a smooth surface, so that the service life is prolonged. Therefore, when fluid flows in the pipeline, impurities are not easy to attach, cleaning is convenient, high-temperature environment can be borne, heat stability is good, various chemical media can be resisted, corrosion of various corrosive chemical substances such as acid, alkali and salt can be resisted, the pipe body is prevented from being corroded and perforated under the condition, normal production and operation are not affected, and the service life of the pipeline is prolonged. And safety accidents and environmental pollution are prevented.

The application relates to a temperature-resistant and acid-resistant heat exchanger and a generating process, which comprises the following steps: a heat exchange pipe group is composed of a plurality of corrosion-resistant heat exchange pipes; the heat exchange pipes are immersed in corrosive chemical liquid and are used for circulating heat exchange of heat exchange medium; a support is used for supporting and fixing the heat exchange pipe group; a collecting component is used for collecting the pipe openings of the plurality of corrosion-resistant heat exchange pipes to form a multi-in and multi-out parallel circulating flow path; a cold water circulating inlet and a cold water circulating outlet are connected with the collecting component respectively and are used for connecting external cold water circulation. The application adopts the corrosion-resistant heat exchange pipes, and all joints are arranged outside the corrosive chemical liquid, so that the corrosion leakage risk is fundamentally eliminated, and long-term stable operation and maintenance-free use are realized.

The invention discloses a high-specific-surface-area nitrogen-doped lignin mesoporous carbon sphere as well as a preparation method and application thereof. The method comprises the following steps: firstly, carrying out solvothermal reaction on a cyanamide nitrogen source calcined product to prepare soluble g-C3N4, and then sequentially adding a weakly acidic potassium acrylate aqueous solution and a soluble g-C3N4 aqueous solution into a lignin organic solvent / water mixed solution under an ultrasonic condition to obtain g-C3N4-lignin / potassium acrylate supramolecular spheres; and directly carbonizing the obtained supramolecular spheres to prepare the nitrogen-doped lignin mesoporous carbon spheres with high specific surface area. The method is simple, does not need corrosive chemical reagents, and can be applied to large-scale production; the high specific surface area provides abundant ion adsorption sites, and the electric double-layer capacitance is remarkably improved; the high nitrogen doping can introduce pseudocapacitance with the capacity being more than five times of that of an electric double-layer capacitor, so that the specific capacitance of the mesoporous carbon sphere is effectively improved; and the mesoporous structure is integrated, so that the transmission of hydrated zinc ions is accelerated, and the rate capability is effectively improved.

The utility model relates to the technical field of environment monitoring, and discloses an environment detection corrosion-resistant storage box, which comprises a storage box main body, a handle and a temperature controller main body, a classification mechanism is arranged in the storage box main body, an auxiliary mechanism is arranged on the classification mechanism, the classification mechanism comprises a drawing plate, and the drawing plate is arranged on the handle. The drawing plate is slidably connected to the inner wall of the right side of the storage box body, a clamping opening is formed in the outer wall of the top of the drawing plate, a classification sample tube is clamped to the inner wall of the top of the clamping opening, rotating rods are rotatably connected to the inner walls of the front side and the rear side of the clamping opening through bearings, and torsional springs are fixedly connected to the outer walls of the side faces of the rotating rods; the outer wall of the side face of the rotating rod is fixedly connected with a cover plate. According to the storage box, by arranging the structures such as the drawing plate, the cover plate and the sample classifying pipes, corrosive chemical samples are classified and distinguished, openings of the sample pipes are sealed and isolated, and corrosion damage to components in the storage box due to mutual fusion of corrosive gas is reduced.

The utility model discloses a high-corrosion chemical wastewater acid-resistant pipeline flange sealing structure, which relates to the technical field of chemical environment-friendly equipment and comprises a plurality of pipelines, a flange arranged on the outer wall of the pipeline on the left side and a second flange arranged on the outer wall of the pipeline on the right side. The inner wall of the flange and the inner wall of the second flange are each provided with a sealing mechanism, each sealing mechanism comprises a plurality of threaded holes, the threaded holes are formed in the inner wall of the flange and the inner wall of the second flange, and the outer walls of the threaded holes are connected with flange bolts in a sliding mode. Then a nut matched with a flange bolt is tightened, when the nut makes contact with the gasket, the gasket is pushed forwards, when the gasket starts to move forwards, the sliding shaft is driven to slide on the fixed shaft, the spring is extruded in the sliding process of the sliding shaft, and the effect of preventing leakage of the sealing face due to insufficient pre-tightening force is achieved; and medium leakage caused by a gap of the sealing surface is avoided.

The invention relates to the technical field of welding wire cleaning, in particular to a mechanical cleaning method and device for the surface of an aluminum welding wire. The cleaning method comprises the following steps that S1, the welding wire penetrates through first treatment liquid containing water and spherical abrasive, a variable magnetic field is applied to drive the spherical abrasive to move, and impact hardening treatment is conducted on the welding wire; s2, enabling the welding wire treated in the step S1 to pass through a second treatment solution containing water, a passivation solution and a needle-shaped grinding material, applying a variable magnetic field to drive the needle-shaped grinding material to move, and performing polishing and passivation treatment on the welding wire; and S3, the welding wire treated in the step S2 is dried and wound. The magnetic field is used for driving the abrasive to conduct contact type mechanical cleaning on the welding wire, no corrosive chemical solvent is depended on, pollution to the environment is small, and the good cleaning effect can be obtained through normal-temperature cleaning; and meanwhile, the surface strengthening and passivating functions are considered.

The invention discloses a sequential activation method for preparing spherical graded porous carbon and application, and relates to the field of electrochemical energy storage materials. The spherical graded porous carbon is prepared by treating a spherical carbon-based precursor through the steps of water vapor activation, inert gas purging and cleaning, carbon dioxide activation and the like. The prepared spherical graded porous carbon keeps the spherical morphology of the precursor, has high specific surface area, high conductivity, high tap density and an optimized graded pore channel structure, effectively solves the traditional contradictions between high specific surface area and high conductivity and between microporous energy storage and mesoporous fast mass transfer, and provides a structural basis for the application of the material in different fields. The method adopts a pure physical sequential activation process, does not need to use a corrosive chemical activator, does not have chemical residues, does not corrode equipment, does not generate harmful tail gas in the reaction process, is green and environment-friendly, and is easy for industrial production.

The invention provides a 10X molecular sieve catalyst based on calcium ion exchange and a preparation method and application thereof, in the preparation process of the 10X molecular sieve catalyst, through control of calcium exchange rate and collaborative optimization of citric acid modification, the prepared catalyst shows high activity (conversion rate gt; 98.5%) and high selectivity (gt; the molecular sieve prepared by the preparation method disclosed by the invention has the advantages that the crystallinity and the structural stability of the molecular sieve are better maintained while pore channel widening and acidity optimization are realized, the service life of the catalyst is longer, the acidity and the pore diameter of the catalyst can be continuously and accurately adjusted between typical properties of 10X and 13X, an optimal equilibrium point for a target reaction is found, and the molecular sieve is suitable for Friedel-Crafts acylation reaction. The whole preparation method is simple, raw materials are easy to obtain, strong corrosive chemicals are not needed in the preparation process, the catalyst can be easily separated and recycled for multiple times, the emission of three wastes is greatly reduced, the ultra-long stable operation capacity exceeding 500 hours is shown in continuous flow production, and the preparation method is suitable for large-scale production.

The application discloses a chemical raw material conveying device with a flow monitoring function, which comprises a connecting pipe, a front pipe and a rear pipe, a mounting plate is fixedly connected to the middle part of the connecting pipe, a first rotating shaft is rotatably connected to the middle part of the mounting plate, a fan blade is fixedly connected to one end of the front pipe in the direction of the first rotating shaft, a first bevel gear is fixedly connected to the other end of the first rotating shaft, a second bevel gear is meshingly connected to the outer side of the upper part of the first bevel gear, a rotating speed measuring instrument is fixedly connected to the tail part of the second bevel gear and penetrates through the connecting pipe, and the rotating speed measuring instrument is fixedly connected to the outer side of the connecting pipe. Compared with a traditional external electronic sensor, the measuring error is reduced, the high-viscosity and corrosive chemical raw material is adapted, and the service life is long.

The invention belongs to the field of two-dimensional material preparation, and discloses a preparation method of a transition metal chalcogenide two-dimensional material transmission electron microscope sample. The preparation method comprises the following steps: preparing a transition metal chalcogenide two-dimensional material sample growing on the surface of a sample substrate; the method comprises the following steps: spin-coating and curing a load medium on the surface of a transition metal chalcogenide two-dimensional material sample, and then covering a heat release support material to obtain a stacked structure material; immersing the stacked structure material into deionized water, stripping the sample substrate to obtain a composite structure material, transferring the composite structure material to the surface of a transition substrate, and heating to obtain a transition structure material; the transition structure material is obliquely inserted into deionized water in the mode that the loading medium faces upwards, the floating loading medium loaded with the transition metal chalcogenide two-dimensional material is fished out through an electron microscope grid, drying is conducted, and the transition metal chalcogenide two-dimensional material transmission electron microscope sample placed on the electron microscope grid is obtained. According to the method, high-risk corrosive reagents such as strong alkali or strong acid used in a traditional method are abandoned, deionized water is mainly used as a stripping medium in the whole process, safety threats such as burning and poisoning of highly corrosive chemicals to operators are fundamentally eliminated, the harsh requirements for ventilation and protection facilities of a laboratory are reduced, and the service life of the laboratory is prolonged. And the operation process is safer and milder.

The application relates to a magnetic driving centrifugal pump structure resistant to strong corrosive chemical medium, which comprises a pump body and a working end, a filtering end for filtering the medium is arranged above a water inlet at the top of the working end, and a backwater end for fault tolerance of dry running is fixedly connected to the top of the working end; the application relates to the technical field of centrifugal pumps. The magnetic driving centrifugal pump structure resistant to strong corrosive chemical medium realizes online self-cleaning filtration based on fluid power: a rotatable filter cylinder is arranged in a pipeline, an impeller is installed at the top of the filter cylinder, and the impeller and the filter cylinder are driven to rotate by the impact force of the downward flow of the medium. The push plate on the surface of the filter cylinder continuously pushes the intercepted solid impurities to the edge of the output section during the rotation, the impurities are automatically gathered by centrifugal force and fluid scouring, and the defects that the traditional filter screen needs to be frequently stopped and cleaned due to blockage are avoided.

The invention discloses a multi-performance coupling test system for a chemical protection product in an extreme environment, and belongs to the field of performance test of chemical protection products. The system adopts a modular integration and bus type communication architecture, and the core comprises five modules, namely an environment simulation module, a test cabin module, a data processing module, a dynamic interference module and an auxiliary function module. The environment simulation module constructs a low-temperature / high-temperature + high-pressure + high-humidity + corrosive chemical coupling environment through fuzzy PID cooperative control, the test cabin module adopts an electrochemical-spectrum composite sensing array to synchronously collect permeation, mechanical and sealing performance data, and the data processing module realizes coupling analysis and failure early warning through a BP neural network. The dynamic interference module simulates vibration, airflow and other real working condition interferences, and the auxiliary module integrates chemical cyclic regeneration and safety protection functions. The nitrile rubber protective glove test verifies that the sample test efficiency is improved, and the chemical cost is reduced. The problems of one-sided scene, low precision, poor efficiency and the like in the prior art are solved.

This invention belongs to the field of hydrophobic coating technology, specifically relating to a method for preparing a wear-resistant superhydrophobic coating with a sodium chloride-etched micro / nano structure. The method includes the following steps: pretreatment of the substrate, preparation of an organic carrier, preparation of inorganic coating slurry and sodium chloride slurry, screen printing and sintering of the inorganic coating, screen printing and sodium chloride etching, post-treatment to form a micro / nano structure, preparation of superhydrophobic capsules, immersion of the post-treated sample in a superhydrophobic emulsion, extraction, and drying. This invention uses sodium chloride melt etching instead of laser etching, eliminating the need for highly corrosive chemicals, making it environmentally friendly and cost-effective. It introduces a biomimetic honeycomb structure, ensuring pattern accuracy through slurry and process control. The resulting coating possesses both excellent superhydrophobic properties and wear resistance, achieving wear-resistant superhydrophobic functionality of an inorganic coating under simple conditions. It is suitable for baking equipment and other applications, meeting the requirements for easy surface cleaning and wear resistance.

The invention provides a method for preparing aliphatic 1, 2-diol through oxidation reaction, which comprises the following steps: by taking an N-hydroxy compound as an oxidant, carrying out oxidation reaction on the N-hydroxy compound and alpha-olefin in an organic solvent in the presence of an additive to generate the aliphatic 1, 2-diol. The method has the advantages of mild reaction conditions, high reaction efficiency, easy separation of the oxidant and the additive from the system, simple preparation process, high product selectivity, high product purity, no use of highly toxic or highly corrosive chemicals, avoidance of the generation of salt-containing wastewater, and recovery of the components to participate in the reaction again. And the method also has certain advancement in the field of chemical environmental protection.

This invention provides a current collector and its surface modification method and application. The surface modification method includes: sequentially subjecting an initial current collector to ultraviolet cleaning, plasma activation, plasma modification, and curing to obtain a surface-modified current collector; wherein the initial current collector includes aluminum foil; the discharge power of plasma modification is greater than the discharge power of plasma activation; the discharge power of plasma modification is 200~400W; and the time interval between plasma activation and ultraviolet cleaning is ≤10min. The surface modification method of this invention, through the synergistic effect of ultraviolet cleaning, plasma grading treatment, and curing, can effectively remove impurities such as oil stains from the surface of current collectors such as aluminum foil, and construct a rough hydrophilic interface, thereby achieving a simultaneous and significant improvement in the surface hydrophilicity and peel strength of current collectors used in sodium-ion batteries, without the need for the use of highly corrosive chemical reagents throughout the process.