16results about How to "Maintain permeability" patented technology

The invention provides a degreasing agent and a body-in-white pretreatment process. The degreasing agent comprises a compound agent, and the compound agent comprises the following components in percentage by weight: 1%-5% of hydroxide, 50%-60% of carbonate, 20%-30% of silicate, 5%-10% of sodium pyrophosphate and 13%-20% of a chelating agent. The body-in-white pretreatment process comprises the following steps: a flood water washing procedure: washing and preheating a plate of a body-in-white; a pre-degreasing step in which a pre-degreasing bath solution is sprayed onto the surface of the plate by means of spraying; a main degreasing procedure, specifically, a main degreasing bath solution containing the degreasing agent is used for conducting degreasing treatment on the plate, the free alkalinity of the main degreasing bath solution is controlled to range from 16 Pt to 19 Pt, and the oil content of the main degreasing bath solution is controlled to be smaller than 3.0 g / L; and an industrial water washing procedure: washing the plate to remove the main degreasing bath solution remaining on the surface of the plate.

The utility model relates to the technical field of black and odorous water treatment, and discloses a deodorization device for treating black and odorous water, which comprises a settling tank, the upper part of the settling tank is fixedly connected with a filter box, the inside of the filter box is slidably connected with a filter plate, and the two sides of the front part of the filter box are fixedly connected with fixed boxes; a movable plate is slidably connected to the interior of the fixed box, a pull rod is fixedly connected to the front portion of the movable plate, a pull ring is fixedly connected to the front portion of the pull rod, a reset spring is fixedly connected to the upper portion of the movable plate, and the other end of the reset spring is fixedly connected to the interior of the fixed box. According to the utility model, the filter plate can be conveniently replaced or cleaned, dirt and organic matters accumulated on the surface of the filter plate can be removed, the permeability and activity of the filter plate can be maintained, stirring can be effectively carried out, organic matters and peculiar smell substances in water can be effectively degraded, and the deposition and breeding of pollutants can be reduced.

The invention discloses a cultivation method for promoting cassava flowering, and belongs to the technical field of crop cultivation. The method comprises the following steps: (1) variety selection; (2) potted plant preparation; (3) cassava planting; (4) potted plant management; (5) first fertilization; (6) second fertilization; (7) spraying flower-inducing liquid; (8) flower preservation. The invention uses a matrix mixed with vermiculite, perlite and coarse sand to make the tubers sprout as soon as possible, and the potted plants are placed in an arch shed for cultivation to promote the growth of plants as soon as possible and advance the growth period. The phosphate fertilizer used in the first fertilization can make the stems and branches of the plants tough and promote the formation of flower buds. The potash fertilizer used in the second fertilization can promote the photosynthesis of the plants and promote the fruiting of the plants. After fertilization, sufficient water is poured to make the soil compacted so that the cassava is not easy to expand the tuberous roots. Then, the flower-inducing liquid is sprayed to make the plants bloom in advance and extend the flowering period. The invention makes the differentiation of cassava flower buds early, improves the flowering ability of cassava, and achieves the purpose of flowering and fruiting.

The present invention relates to a hollow fiber membrane in which the thickness L of a spherical structure layer is 60-500 µm (inclusive), the spherical structure layer has a first surface and a second surface, the average diameter Dai of the spherical structure in a region Sa1 10 µm or less from the first surface and the average diameter Db2 of the spherical structure in a region Sb2 10-20 µm from the second surface satisfy the relational expression Da1 > Dbz, and the spherical structure satisfies certain parameters.

The invention relates to the technical field of fabrics, in particular to a light and thin all-cotton three-proofing fabric as well as a preparation method and application thereof. The invention discloses a preparation method of a light and thin all-cotton three-proofing fabric. The preparation method comprises the following steps: S1, preparing 80-100S / 1 high-count cotton yarn; s2, the high-count cotton yarn is prepared into a fabric through a weaving process, and the fabric is pretreated; s3, dyeing the pretreated fabric, washing the dyed fabric, and adjusting the pH value of the fabric to 4-5; s4, a three-proofing assistant is applied to the dyed and washed fabric, and shaping treatment is carried out; and S5, carrying out preshrinking treatment on the shaped fabric to obtain the light and thin all-cotton three-proofing fabric. According to the preparation method disclosed by the invention, the light, thin and soft all-cotton fabric with excellent three-proofing performance and good washability is obtained by accurately controlling process parameters of links such as spinning, weaving, sizing, pre-treatment, dyeing, three-proofing assistant, sizing and the like.

The invention relates to the technical field of fruit and vegetable protection, in particular to an anti-bird and anti-insect physical barrier type fruit and vegetable protection planting facility which comprises a planting frame and a protection net, a plurality of bottom plates are arranged on the two sides of the planting frame, protection boxes are arranged on the bottom plates, and connecting assemblies are arranged in the protection boxes; the connecting assembly comprises a fixing frame, a shaking assembly is arranged above the fixing frame, and an upper sliding plate and a lower sliding plate are arranged on the inner side wall of the fixing frame. First connecting rods are arranged on the upper sliding plate, second connecting rods are hinged to the first connecting rods, and the second connecting rods are hinged to the top of the fixing frame; extension rods are arranged on the lower sliding plate, third connecting rods are hinged to the second connecting rods, and the third connecting rods are hinged to the adjacent extension rods; a through groove is formed in the upper sliding plate, a moving plate is arranged in the through groove, a rotating groove is formed in the moving plate, a rotating plate is arranged in the rotating groove, and a driving assembly is arranged on one side of the rotating plate. Birds and insects are repelled through the shaking assembly, and gathering of dust and impurities on the net face is reduced.

The utility model belongs to the technical field of dust removal, and particularly relates to a high-temperature dust removal cloth bag convenient to replace, which comprises a mounting ring and a top plate, a dust removal cloth bag body is mounted at the bottom end of the mounting ring, a mounting mechanism is arranged in the top plate, a connecting plate is mounted at the bottom end of the top plate, and supporting rods are mounted on two sides of the bottom end of the connecting plate. The bottom ends of the two supporting rods are jointly connected with a bottom ring, a flapping mechanism is arranged on the connecting plate, and mounting plates are mounted on the two sides of the upper end of the top plate. According to the utility model, through the arrangement of the mounting mechanism, the mounting ring and the dust collecting bag body are sleeved on the outer side of the top plate, so that the mounting work can be carried out, the mounting is convenient and labor-saving, and subsequent overhaul and maintenance are facilitated; and through the arrangement of the flapping mechanism, the mounted dust collection bag body can be flapped, so that the dust collection bag body is prevented from being blocked by dust, accumulated dust and particles are prevented from falling off, and the permeability and the dust collection efficiency of the dust collection bag body are kept.

The utility model belongs to the technical field of waste gas treatment, and particularly discloses waste gas treatment equipment which comprises a mounting frame, a fixing plate is fixedly connected to the outer surface of the mounting frame, a rubber strip is detachably mounted on the inner side of the fixing plate through a mounting mechanism, and a connecting piece is arranged on the inner side of the rubber strip. A rubber strip is arranged on the fixing plate, a filter screen is arranged on the inner side of the rubber strip, an elastic mechanism is arranged on the mounting frame, a material collecting box is fixedly mounted at the bottom of the mounting frame, the mounting mechanism comprises a screw movably arranged on the inner side of the fixing plate in a penetrating manner, and the outer surface of the screw is movably arranged at the end of the rubber strip in a penetrating manner. According to the waste gas treatment equipment, impurities accumulated on the filter screen can be effectively shaken off under the action of the elastic mechanism by regularly starting the vibrator, and the permeability and the filtering efficiency of the filter screen are kept, which means that the filtering effect of waste gas can be continuously kept even in a long-time operation process; and the filtering efficiency is not reduced due to impurity accumulation.

In a separator for an aluminum electrolytic capacitor having a conductive polymer, short circuit resistance is improved. The constitution of an aluminum electrolytic capacitor separator for an aluminum electrolytic capacitor having a conductive polymer as a cathode material, which is sandwiched between a pair of electrodes, is characterized in that it contains synthetic fibers and a binder, and has a breaking strength of 40 to 180 kPa, a breaking resistance index of 3.5 to 7.5 kPa / (g / m 2 ).

The application discloses an impact self-cleaning sand prevention device, which comprises a coupling, a sand filter pipe, a variable-diameter piston assembly, a central pipe and an impact vibrator. The top end of the coupling is connected with a sucker rod string, the bottom end of the coupling is connected with the top end of the sand filter pipe, the bottom end of the sand filter pipe is connected with the top end of the central pipe, and the bottom end of the central pipe is connected with the top end of the impact vibrator. The variable-diameter piston assembly is connected to the outer wall of the central pipe. The impact self-cleaning sand prevention device can continuously and timely remove the blockage of the sand filter pipe during the extension and retraction of the sucker rod string in the upstroke and downstroke of the oil pump, so that the permeability of the sand filter pipe is maintained.

The application relates to the field of preparation of liquid flow battery electrode materials, and discloses a graphite felt electrode loaded with nano bismuth particles and a preparation method thereof. The method comprises the following steps: pretreating a graphite felt electrode to obtain a hydrophilic graphite felt electrode; immersing the hydrophilic graphite felt electrode into a solution containing bismuth ions, taking out and drying to obtain a graphite felt loaded with reduced bismuth precursor crystals; and treating the graphite felt loaded with the reduced bismuth precursor crystals by using plasma to obtain the graphite felt electrode loaded with nano bismuth particles. By using the plasma reduction technology, the bismuth ions adsorbed on the surface of the graphite felt fibers are directly reduced into nano bismuth metal particles. The method can avoid high temperature and a complex process flow in the traditional method, realizes a simple and efficient preparation process, and is suitable for large-scale electrode modification.

The application discloses an ion cage connected covalent organic framework compound and a preparation method and application thereof. The preparation method comprises the following steps: mixing an iron source, an oxime base derivative, a boric acid base derivative, a first solvent and a second solvent, and performing a liquid nitrogen freezing-pump air extraction-freezing cycle degassing treatment, then sealing and performing a condensation reaction to prepare a metal chelate connected covalent organic framework compound; and performing acid treatment on the metal chelate connected covalent organic framework compound to prepare the ion cage connected covalent organic framework compound. The preparation method provided by the application has the advantages of easy raw material, mild conditions, simple operation, and the like, and the prepared covalent organic framework compound has a clear cavity structure and a periodic arrangement of coordination sites, exhibits excellent chemical stability and regular channel characteristics, and has a wide application prospect in the fields of ion adsorption separation, heterogeneous catalysis and the like.

This utility model discloses an MMF filtration device for semiconductor water treatment, relating to the field of waste liquid treatment technology. Its key technical features include: a multi-media filter with an inlet pipe and an outlet pipe installed at its inlet and outlet, respectively. Both the inlet and outlet pipes are equipped with liquid pumps capable of forward and reverse flow. The inlet pipe is connected to a connecting pipe and a waste discharge pipe via a first three-way valve, and the outlet pipe is connected to a drain pipe and a cleaning pipe via a second three-way valve. The connecting pipe is connected to a container holding semiconductor waste liquid, and the cleaning pipe is connected to a tank containing cleaning fluid. This utility model, combined with MMF filtration technology, further enhances filtration capacity.

The application discloses a kind of water conservancy construction geotechnical sampling device and method, it is related to soil detection sampling technical field, including base, lifting mechanism, sampling execution mechanism;Sampling execution mechanism includes sampling column, drive assembly and inlay strip, sampling jaw;Drive assembly is used to drive sampling jaw swing;Inlay strip can be moved to outside relative to sampling jaw, to extrude soil at the edge of sampling jaw to outside displacement.The application in the process of jaw convergence, adjacent permanent magnet on inlay strip attract each other, drive inlay strip to move to outside.This action will be extruded soil at the edge of jaw to outside shear, displacement, so that disturbed soil is located at the outside of sampling jaw.Finally, the sample left in the inside of sampling jaw is substantially not subjected to lateral extrusion force, so as to maintain the original density, porosity and permeability of soil, ensure the reliability of detection data, reduce edge soil extrusion, maintain the physical properties of sample as is.

The invention relates to the field of filtering membranes, in particular to an antibacterial filtering membrane for treating cutting fluid and a preparation method of the antibacterial filtering membrane, and aims at solving the problems that an existing filtering membrane for the cutting fluid is poor in antibacterial performance and insufficient in mechanical strength. According to the preparation method, copper nano particles and silver nano particles with broad-spectrum antibacterial effects are combined with high-strength and high-conductivity graphene, so that the prepared antibacterial filtering membrane has excellent antibacterial performance, growth of microorganisms can be effectively inhibited, small particles and microorganisms in the cutting fluid can be effectively removed, and the antibacterial filtering membrane has a good antibacterial effect on the cutting fluid. The antibacterial filter membrane has the advantages of high mechanical strength, high chemical stability, adaptability to complex industrial environments, simplicity in preparation process and suitableness for industrial production, and provides reliable technical support for management and cyclic utilization of the cutting fluid.