2918results about How to "High reuse rate" patented technology

The invention belongs to the technical field of chemical industry, and relates to a cooling water corrosion inhibitor, in particular to an efficient composite corrosion and scale inhibitor which can remarkably reduce corrosion and scaling phenomena of the cooling water of a petrochemical system. The corrosion and scale inhibitor is prepared by evenly mixing organic phosphine carboxylic acid corrosion inhibitor, organic multi-element phosphine acid corrosion and scale inhibitor, polymer scale inhibitor, metal ion succimer, surface active agent, zinc salt, functionality additive and water. The corrosion and scale inhibitor prepared from the components has low phosphine content and excellent corrosion and scale inhibition performance, can prolong the service life of devices, improve the repeated utilization rate of cooling water and reduce the water resource consumption.

The invention discloses a frame rate up-conversion motion estimation method and a frame rate up-conversion motion estimation system based on Kalman filtering. The method comprises the following steps: first, the parameters and the initial value of state of a Kalman filtering model are set to make the model accord with the actual system; then, the observed value of a motion vector is obtained through a strategy in which unidirectional motion estimation is carried out first and then a unidirectional motion vector is mapped to an interpolated frame; and finally, an observation vector is updated by a time-variant gain Kalman filtering method so as to obtain a more accurate motion vector. Based on the method, a frame rate up-conversion motion estimation hardware architecture based on Kalman filtering is put forward. High utilization rate and high throughput of the system are realized through an alternate block scanning sequence and two parallel data channels.

The invention provides a substrate with surface-enhanced Raman scattering activity and a preparation method thereof, and the method comprises the following steps: the glass base surface is subjected to hydroxylation and amination treatment; catalytic hydrolysis is carried out on ethyl orthosilicate under the alkali condition by taking alcohol as a solvent; Silica microspheres with even size and smooth surface are prepared by an oscillation method; silane coupling agent of which the tail end is provided with amino is assembled on the surface of the silica microspheres; silver sol obtained by reducing sodium borohydride to silver nitrate through oscillation is assembled on the surface of SiO2-NH2NPs, and is diffused in water again after centrifugal separation and washing by distillated water; self assembly is carried out on the silver sol after being placed in SiO2@Ag NPs dispersion for 6-12h; the SERS active substrate is obtained after taking out from water and drying. In the SERS active substrate of the invention, the active particles and the substrate are combined firmly, thus being applicable to detecting unimolecular Raman signals in aqueous solution; the substrate can be used for SERS detection repeatedly, thus improving repeated utilization ratio of the substrate.

The invention relates to the field of industrial wastewater treatment processes and provides a method for deeply treating, desalting and recycling industrial wastewater with high salt content. The method comprises the following steps: 1) carrying out efficient coagulation treatment on the industrial wastewater with high salt content to obtain supernatant; 2) carrying out chemical precipitation on the supernatant obtained in the step 1) to remove high valence ions with valence higher than bivalence in the wastewater; 3) carrying out catalytic ozonation treatment on the supernatant subjected to chemical precipitation in the step 2); 4) carrying out multi-media filtration, precise filtration and membrane filtration treatment on the wastewater subjected to catalytic ozonation in the step 3) in sequence; and 5) carrying out electrodialysis reversal treatment on the effluent obtained after membrane filtration in the step 4). By adopting the method, organic matters, bacteria, colloids, suspended particles, Ca<2+>, Mg<2+> and high valence ions, other soluble inorganic salts and the like in the industrial wastewater with high salt content are removed by utilizing the coupling and synergistic effects of different unit technologies, thus achieving deep treatment, desalting and recycling of the industrial wastewater with high salt content.

The invention relates to a conduction-cooled superconducting magnet Dewar with easy loading-unloading, comprising a Dewar cylinder. The conduction-cooled superconducting magnet Dewar is characterized in that the Dewar cylinder is a hollow annular cylinder, the middle of the annular cylinder is provided with a room temperature hole, an annular copper cold shield is arranged in the Dewar cylinder, a refrigerator and a superconducting magnet are arranged in the copper cold shield, a vacuum pumping port is arranged on the Dewar cylinder, a measuring device is arranged on an upper cover of the Dewar cylinder and the Dewar cylinder is in a vacuum state. Compared with the prior Dewar container, the conduction-cooled superconducting magnet Dewar is simpler, has small conduction heat leakage, and has the advantages of easy installation and disassembly; the refrigerator is used for conducting and cooling without a low temperature liquid (such as liquid helium and so on) cooling system; because of simple and safe system, a first-level cold junction of the refrigerator is operated under a temperature of 77K, thereby realizing heat sink of the copper cold shield, an electric lead and a support device; the first-level cold junction of the refrigerator adopts soft connection, thereby reducing temperature increment of the magnet due to vibration of the refrigerator; and the conduction-cooled superconducting magnet Dewar has the advantages of easy operation of manufacture, processing and installation, and is applicable to scale production.

The invention discloses a joint pumped storage power station and wind power and solar power complementary system and an optimization method therefor, and belongs to the technical field a joint wind power and solar power energy storage power generation system. By transforming an available space of a waste mine, a hybrid power generation system, combined by an underground water-pumping energy-storage power station and a surficial wind power and solar power complementary power generation system, is established; by taking the operation indexes, such as the wind power and solar power complementary system, the water-pumping energy-storage power station, power grid transmission power and the like as constraint conditions, a configuration model with the minimum wind power and solar power complementary output fluctuation, the minimum joint system output fluctuation and an optimized tracking load curve is obtained; and finally, solving and optimization on the model is performed based on an improved simulated annealing algorithm. By taking full advantages of the energy storage and power generation capability of the underground water-pumping energy-storage power station and by combination with the complementary characteristics of the wind power and solar power resources, the joint system is higher in flexibility in output regulation, the total output tracking load curve is better in effect, and the system is higher in new energy consumption and utilization.

The invention relates to a steam stripping method of process condensate in CO conversion. The invention is characterized in that the process condensate firstly enters the upper part of a carbon dioxide steam stripping tower for flashing evaporation; secondary steam from the upper part of an ammonia-evaporated steam stripper tower enters the bottom part of the carbon dioxide steam stripping tower and steam strips carbon dioxide by countercurrent contacting with the process condensate after flashing evaporation; the process condensate after flash evaporation and the steam stripped carbon dioxide carry out countercurrent contact; the process condensate after flash evaporation and steam stripping enters the upper part of the ammonia-evaporated steam stripper tower from the bottom part of the carbon dioxide steam stripping tower and is steam-stripped by low-pressure steam entering from a kettle of the ammonia-evaporated steam stripper tower; gas phase is treated by secondary condensation to obtain non-acid-coagulated gas and condensate sewage; and steam stripping water is obtained from the bottom part of the ammonia-evaporated steam stripper tower. The invention carries out steam stripping on the upper and lower towers to carbon dioxide and ammonia in the process condensate respectively, thus avoiding the possibility of coexistence of carbon dioxide and ammonia in a condensing system, effectively solving the problem that the steam stripping system of the process condensate in the conversion procedure occurs ammonium salt crystallization blockage and prolonging the period of stable operation of a conversion device.

The invention discloses a magnetic nanoparticle-based immobilized laccase and an ionic liquid composite particle, a preparation method thereof and application in removal of contaminants in water. The preparation method comprises the steps that carbonyl iron is taken as an iron source and is synthesized to be gamma-Fe2O3 nano-particles through a chemical precipitation method; the magnetic nanoparticles are taken as cores, tetraethoxysilane and a silane coupling agent are taken as a silicon source, and by means of a sol-gel method, surface amino-functionalized nano core-shell type magnetic silicon dioxide is prepared; 1-ethyl-(3-dimethyllaminopropyl) carbodiie hydrochlide is taken as a coupling agent, and laccase is bonded on the surface of the nano core-shell type magnetic silicon dioxide in a covalent bond manner to obtain the immobilized laccase of the magnetic nanoparticle silicon dioxide particles; and then the immobilized laccase is reacted with a functionalized ionic liquid which is synthesized by reacting N,N-carbonyldiimidazole and an ionic carboxy contained liquid to prepare the magnetic nanoparticle immobilized laccase and ionic liquid composite particle, and the composite particle is applied to the removal of the contaminants in water.

The invention discloses a preparation method of cobalt-loaded mesoporous graphite-phase carbon nitride (Co / mpg-C3N4) and an application of cobalt-loaded mesoporous graphite-phase carbon nitride (Co / mpg-C3N4) in visible-light-induced catalytic degradation of methylene blue. The catalyst is prepared by steeping a cobalt precursor and roasting at high temperature. The preparation method comprises the following steps of: (1) roasting at high temperature by using silica solution (Ludox, HS-40, 12nm, 40wt%SiO2) as a template and cyanamide as a carbon source and a nitrogen source, and removing the template to prepare mesoporous graphite-phase carbon nitride (mpg-C3N4); and (2) steeping the precursor solution of cobalt into mpg-C3N4, carrying out secondary high-temperature roasting in a muffle furnace to prepare the load-type catalyst Co / mpg-C3N4. By using the cobalt-carried mesoporous graphite-phase carbon nitride as the visible-light-induced catalyst, the result shows that the effect of the cobalt-carried mesoporous graphite-phase carbon nitride used for the visible-light-induced catalytic degradation of methylene blue is good, and the visible-light-induced catalytic degradation rate is obviously improved in comparison with the mesoporous graphite-phase carbon nitride (mpg-C3N4) without cobalt.

The invention relates to a titanium-silicon molecular sieve TS-1 catalyst for catalyzing ketone oximation reaction. In order to solve the problems of small particles, difficult separation and reutilization, high synthesis cost, strict and complex requirements in the process of gluing, poor repeatability and stability and the like in the prior art, the invention provides a new titanium-silicon molecular sieve TS-1 catalyst for the catalyzing ketone oximation reaction, which is prepared from the following steps: mixing the titanium-silicon molecular sieve TS-1 with one or more solutions of organic amine, ammonium salt, ammonia water and urea, carrying out crystallization again under the self-generating hydro-thermal pressure, and filtering, washing, drying and roasting to obtain the product. The prepared titanium-silicon molecular sieve TS-1 catalyst has large particles and easy separation and recovery after reaction, can improve the reutilization ratio, is especially suitable for ketone oximation reaction using hydrogen peroxide as an oxidizing agent, and can not produce byproducts, thereby protecting the environment and being beneficial to industrial application.

The invention relates to a preparation method of amino modified Fe3O4@SiO2@mSiO2 composite particles with a mesoporous structure. The preparation method comprises the steps: dispersing Fe3O4@SiO2 powder into a mixture solution of ethanol, deionized water, ammonia water and a template agent, so as to obtain a sol solution; then, dropwise adding TEOS into the sol solution, so as to prepare Fe3O4@SiO2@mSiO2 composite particles with the mesoporous structure; drying the Fe3O4@SiO2@mSiO2 composite particles, then, adding ethylene glycol into the dried Fe3O4@SiO2@mSiO2 composite particles, carrying out ultrasonic separation, then, adding a silane reagent, carrying out high-temperature refluxing while carrying out stirring so as to enable the silane reagent to be adsorbed into mesoporous pore passages of SiO2, carrying out a hydrolytic reaction, removing unreacted silane reagent or the silane reagent which is not adsorbed into the mesoporous pore passages, and finally, carrying out vacuum drying, thereby obtaining the amino modified Fe3O4@SiO2@mSiO2. According to the preparation method, SiO2 with a mesoporous structure serves as a shell layer, a nanoparticle Fe3O4 serves as a magnetic core, the stability in an acidic solution system is excellent, the difficult problem of the ordinary adsorbents that the separation is difficult after adsorption can be solved, the efficiency of adsorbing a target product is increased, and the reuse rate of an adsorbent is increased, so that the preparation method has good economic and environmental benefits.

The invention discloses a spherical cellulose chelate sorbent with amidoxime group and carboxyl group and a preparation method thereof. The average pore size of the spherical cellulose chelate sorbent is 5-40nm, the specific surface area is 160-750m<2> / g, the skeletal density is 0.94-1.45g / ml, the apparent density is 0.35-0.78g / ml, the pore volume is 0.25-1.3ml / g, the water content is 45%-70%, the contents of the amidoxime group and the carboxyl group are respectively 10.6-15.0mmol / g and 0.30-0.80mmol / g. The preparation method comprises the steps of graft copolymerization, saponification and the formation of amidoxime. The spherical cellulose chelate sorbent with the amidoxime group and the carboxyl group of the invention has the advantages of high polarity and excellent special noble metal absorption selectivity, simple and easy preparation method and low manufacturing cost; and the cellulose is an abundant natural renewable material; therefore, the spherical cellulose chelate sorbent with the amidoxime group and the carboxyl group can produce practical economic benefit and environmental benefit on enrichment recovery of the noble metals, etc.

The invention relates to a purification process for preparing high-purity coenzyme Q10 from crude coenzyme Q10 extracts obtained from thallus fermentation, which belongs to the technical field of compound separation purification. The purification process is characterized by sequentially comprising the following steps of: carrying out adsorbent resin adsorption, elution, concentration, crystallization and recrystallization on the crude coenzyme Q10 extracts; then, carrying out chromatography on a silicagel column; and purifying and refining by using a petroleum ether -aether or normal hexane-ethyl acetate mixed solvents as eluant. The invention has the following advantages that by adopting an adsorbent resin, good adsorption performance can be exerted on the coenzyme Q10, the desorption operation is simple, the stability is good, and the adsorbent resin can be reused many times; and by combining the adsorbent resin with the silica gel chromatography method, the silica gel utilization rate is high, the required silica gel is low quantity and can maintain good purification effect after being reused more than 10 times, the waste quantity of the silica gel is small, and the solvents can be recycled so that the purpose of environment protection is achieved. The production operation is simple and convenient, and the purity of the obtained coenzyme Q10 is higher than or equal to 98 percent.

The invention discloses a manufacturing method of an ice bag for preserving biological products. The manufacturing method comprises the following steps: 1) adding a thickener into hot water or boiling water, and fully stirring till dissolution; 2) adding high molecular water-absorbing resin into a solution in the step 1) while hot, stirring, then standing to carry out full reaction and imbibition on the high molecular water-absorbing resin and the thickener, and forming a gelatinous solid, wherein the reaction time is 5-30minutes; and 3) bagging the gelatinous solid in the step 2), cooling, and then placing into a cold storage, a refrigerating cabinet or a refrigerator at the temperature of -10 DEG C to -20 DEG C for freezing for above 12hours. The invention provides a simple, convenient and high-efficient manufacturing method of a high molecular cold storage agent, namely the manufacturing method of the ice bag for preserving the biological products. The prepared cold storage agent has the advantages of high repeatability, great freezing-thawing phase change latent heat, long cold storage time and fast water absorption speed, and furthermore, the cost of the process is low; and by changing the added thickener, the different phase change temperatures can be obtained for meeting various different application requirements.

The invention discloses a construction method of a geogrid reinforced clay edge-covered tailing subgrade and belongs to the technical field of subgrades in the civil engineering. The construction method comprises the following steps: foundation treatment, sand gravel underlayer construction, laying of a two-way geogrid and water-permeable geotechnical cloth, feeding laying operations of clay edge-covering layers on the two sides of the subgrade and a tailing subgrade main body layer by layer, rolling construction, one-way geogrid construction between the tailing subgrade main body and the edge-covering clay to a designed elevation, and finally, the construction of an ash doped clay sealing layer. As the one-way geogrids are laid between the clay edge-covering layers on the two sides of the subgrade and the tailing subgrade main body, the defects such as differential settlement, poor subgrade stability and the like between the two fillers, namely the clay and the tailings, are reduced. The construction method has the advantages of simple structure, low cost and convenience for construction; besides, the consumption of the tailings and the overall stability of the subgrade can be increased, the differential settlement and the usage of the earthwork of the subgrade are reduced, rainfall infiltration and capillary water rise are decreased, and the internal drainage performance of the section of the subgrade is improved.

The invention discloses a novel double shear wall deformation joint mould plate. Forming mould plate system on each side comprises a panel, wherein vertical wood keels are fixed outside the panel by iron nails, horizontal keels are arranged outside the vertical wood keels, the horizontal keels are made of steel pipes, and each two steel pipes are closely arranged; the two adjacent steel pipes of the forming mould plate system on one side are welded with a steel plate provided with a screw rod hole, a nut of a double-pulling screw rod is welded in the screw rod hole; the horizontal keels of the forming mould plate system on the other side are provided with a reverse M-shaped clip used to fix the double-pulling screw rod; the double-pulling screw rod passes through the forming mould plate system on the left side and the forming mould plate system on the right side, and is fixed by the steel plates and the nut in the reverse M-shaped clip; a wall plate thickness limitation support is arranged between the panels of the forming mould plate system on the left side and the forming mould plate system on the right side; the double-pulling screw rod is sleeved by a plastic sleeve, both ends of which are inserted in the panels of the forming mould plate system on the left side and the forming mould plate system on the right side respectively. The mould plate of the invention has the advantages of reasonable structure, cost conservation, short construction period, convenient use, flexible assembly, high repeated use rate and good constructional safety.

The invention discloses an excellent and efficient carbon fiber biofilm carrier modification method and aims to improve water treatment performance of carbon fibers used as biofilm carrier materials. A basic raw material is the carbon fibers; the modification method mainly comprises steps as follows: firstly, acid oxidation treatment is performed on the carbon fibers, so that surfaces of the carbon fibers are ensured to have sufficient functional groups for preparation for iron carrying; then an organic iron solution is used as a modifying agent, surface modification is performed on the carbon fibers with a liquid phase impregnation method, and an organic-iron-modified carbon fiber biofilm carrier material with the surface containing the iron element is prepared. The preparation method is simple and easy to implement, prepared organic-iron-modified carbon fibers can keep original excellent performance of the carbon fibers, the surface roughness and the hydrophilicity are significantly improved, the film colonization cycle is short, the microbial activity is improved, time required for water treatment is short, removal rates of COD, ammonia nitrogen and total phosphorus are obviously increased, the outgoing water quality is good in stability, and the reuse rate is higher.

The invention discloses a stool sample preservation liquid, a preparation method and application thereof. Specifically, the stool sample preservation liquid contains: 45 vol%-60 vol% of a fixing agent; 0.1 mass%-15 mass% of a fixing agent adjuvant; 0.01 mass%-1.5 mass% of an anticoagulant; 10 vol%-15 vol% of a buffer solution; 0.01 mass%-1 mass% of an ionic strength maintenance agent; 0.01 vol%-0.5 vol% of a nonionic detergent; and the balance water. The stool sample preservation liquid provided by the invention has the characteristics of easy preparation and low cost, can preserve stool samples at room temperature, also can effectively inhibit DNA degradation and cell damage of stool samples, maintain cell shape, and can preserve samples for a long time, and the preserved samples have high qualification rate during reutilization.

The invention discloses a device for detecting scratch and out-of-roundness of a wheel thread on line. The device comprises a working track (1) and a track clamping block (2), wherein a detection device (3) is arranged on the upper side of the track clamping block (2) and comprises a housing (4); a rocking arm bracket (5) and a rocking arm swing rod (6) are arranged in a cavity in the housing (4); the rocking arm swing rod (6) is embedded between the upper side of the rocking arm bracket (5) and an upper housing of the housing (4); the front end of the rocking arm swing rod (6) extends from the housing (4) to the working track (1); a measuring rod (7) is arranged at the front end of the rocking arm swing rod (6); a drive gear (8) fixedly connected and coaxial with the rocking arm swing rod (6) is arranged at the rear end of the rocking arm swing rod (6); a driven gear (9) connected with the drive gear (8) in an engaged way is arranged on the outer side of the drive gear (8); and a rotary encoder coaxial with the driven gear (9) is arranged on the driven gear (9). The device is high in detection precision, good in stability and wide in application range.

The invention discloses a method for preparing a microorganism-loaded sandwiched micro-nano fiber composite membrane capable of adsorbing heavy metals on the basis of alternate use of electrostatic spinning and electrostatic spraying. The method comprises the steps that a polymer composite is dissolved into an organic solvent, and magnetic stirring is conducted to obtain a mixed solution; a micro-nano fiber membrane is prepared through an electrostatic spinning technology; microorganisms are dispersed into deionized water, and the solution is stirred to be uniform and electrostatically sprayed on the surface of the micro-nano fiber membrane; a sample is put into a vacuum drying oven to be dried till the solvent is completely volatilized, and a double layer is obtained; the microorganism-loaded sandwiched micro-nano fiber composite membranes with the different needed odd and even layer numbers can be obtained through repeated operation. What is more novel is that the material can achieve repeated desorption and reutilization and is significant in adsorption effect; in addition, the method is low in raw material cost, good in biocompatibility, mild in reaction condition, wide in applicability and the like and is expected to be applied to large-scale industrial production.

The invention provides an underwater three-dimensional detection gliding robot. The robot comprises an appearance system, an internal adjusting system, and a control system; the internal adjusting system and the control system are arranged in the inner side of the appearance structure; and the control system is used to communicate and control the internal adjusting system. The appearance system is in a streamline shape and is provided with a communication part, so that the system has the advantages of low energy consumption, strong autonomy and enduring performance, low maintenance cost, little dependence on mother ship, and capability of achieving cooperative work, and fully satisfy the requirements of large scale, long period, and large size on sea environment supervision. The internal adjusting system comprises a pitching adjusting part, a rolling adjusting part, and a floating force adjusting part so as to make the robot have two work states: a linear gliding and a spiral gliding, so that fixed point spiral covering type sea supervision and vertical cross-section zigzag cruising supervision can both be realized, and a tri-dimensional supervision from the horizontal level to the deep sea is actually achieved.

The invention discloses a construction method of a prefabricated assembled building. The construction method comprises the following steps of designing and manufacturing of prefabricated components, acceptance inspection and field entering of the prefabricated components, measurement, paying-off, installation of the prefabricated components, and the like. In the process of installing the prefabricated components, the building is built and constructed through installing two layers of outer wall protection frames and adopting a method of using double-layer frame bodies in an exchange way. The construction method has the advantages that the construction work procedures of installing, correcting and fixing outer wall plates, casting concrete slurry and the like are completed in modes of forming wall connecting preserved holes in the prefabricated outer wall plates and installing the outer wall protection frame; the arrangement of a great number of embedded parts and suspended holes on an outer wall is avoided; the engineering quality is improved; and the damage rate of the outer wall engineering is reduced.

The invention provides a functional nano-composite material, which comprises a flexible fiber carrier and a plurality of functional nanoparticles immobilized in the flexible fiber carrier. The flexible fiber carrier comprises at least one brush-like structure, and the plurality of functional nanoparticles are clamped and fixed in the at least one brush-like structure. The invention also provides a preparation method and application of the functional nano-composite material. In the invention, flexible fiber is adopted as the carrier to realize effective loading of the functional nanoparticles. The loading compounding mode can realize high capacity loading of the functional nanoparticles, and the loading rate is up to 10% of the weight of the flexible fiber carrier. At the same time, the functional nanoparticles can be extended to all scenes in which the flexible fiber carrier can be applied, can be applied to sewage purification, air purification, bacteria resistance, disinfection and other environmental protection fields, and the application range is very wide.

The invention provides TiO2 / RGO aerogel, and a preparation method and application of the TiO2 / RGO aerogel, belonging to the technical fields of material preparation and environment purification. By adopting L-Cysteine as a reducing agent and a crosslinking agent, the TiO2 / RGO aerogel is prepared by loading TiO2 onto ROG aerogel by a simple one-step hydrothermal method for the first time, and the TiO2 / RGO aerogel has a macrostructure of which the diameter is 2.0cm and the height is 3.5mm. The prepared aerogel has high specific surface area, can efficiently adsorb oily wastewater and treat the oily wastewater in a photocatalysis manner, and is easy to separate and recycle. The preparation method is simple, is beneficial to large-scale industrial production, and has significant economic benefits and social benefits, and raw materials are cheap and easily available.

The invention discloses a preparation method of a breast milk fat structural fat substitute, and belongs to the field of food additives and structural fat preparation. In the method, palm stearin is used as a raw material, the content of palmitic acid at the sn-2 position is improved through a random ester exchange reaction, and then the palm stearin and mixed fatty acid subjected to the random ester exchange reaction are catalyzed by sn-1,3 specific lipase to prepare a structural fat similar to breast milk fat, namely a breast milk fat structural fat substitute mainly comprising 1,3-dioleoicacid-2-palmitic acid triglyceride (OPO). An enzymatic reaction in the method provided by the invention adopts a solvent-free system, the repeated utilization rate of an enzyme preparation is high, andthe safety is good; therefore, the method provided by the invention has the advantages of stable source, low price, simple reaction process, short reaction time, high product content, 84.33% similarity of composition and components between an obtained product and the breast milk fat, controllable quality and the like in the production of the structural fat, and is suitable for large-scale industrial production.

The invention relates to a polyacrylonitrile fiber bimetallic complex catalyst and a preparation method thereof. The catalyst is characterized in that the appearance is between brownish yellow and yellowish green and is fiber-shaped; and the catalyst is formed by polyacrylonitrile fiber which is modified by hydrazine hydrate and hydroxylamine hydrochloride, and a coordination compound of iron ion and copper ion, wherein, the contents of iron ion and copper ion are 11.60mg / g to 26.10mg / g and 11.15mg / g to 28.30mg / g respectively. The preparation method adopts the following steps: 1. the pre-treatment of the polyacrylonitrile fiber; 2. modified reaction of the hydrazine hydrate of the polyacrylonitrile fiber and hydroxylamine hydrochloride; 3. the preparation of mixed solution of iron ion and copper ion; 4. the coordination reaction of the modified polyacrylonitrile fiber and metal ions; therefore, the fiber-shaped polyacrylonitrile fiber bimetallic complex catalyst with the color between brownish yellow and pale green is obtained. The catalyst has good catalytic activity, is applicable to the degradation of dyes in the basic printing and dyeing wastewater and has high reuse rate.

The invention discloses a silica brick for a glass furnace, and belongs to the technical field of refractory materials. The silica brick for a glass furnace comprises: by weight, 30 to 45% of silica having particle sizes of 3 to 1.0mm, 5 to 25% of silica having particle sizes of 1.0 to 0.5mm, 30 to 50% of silica having particle sizes less than 0.5mm, an additive and a composite additive, wherein the weight of the additive is 5 to 15% of the total weight of the silica and the weight of the composite additive is 2 to 10% of the total weight of the silica. SiO2 content of the silica is great than or equal to 99%. Al2O3 content of the silica is less than or equal to 0.25%. Fe2O3 content of the silica is less than or equal to 0.45%. The additive is a waste silica material having SiO2 content great than or equal to 96%. The composite additive is a mixture of lime milk, mill scales and calcium lignosulphonate. The silica brick for a glass furnace has high SiO2 content, a high yield, low impurity content, low apparent porosity, good high-temperature performances and a long service life. A preparation technology of the silica brick for a glass furnace is simple and is suitable for large-scale production.

The embodiment of the invention discloses a memory management method, which comprises the following steps of: receiving a memory allocation request which comprises memory size requested to be allocated; selecting a best matched memory space from all available spaces of the memory according to the memory size requested to be allocated, wherein the best matched memory space is the minimum available space in the available spaces which are no less than the memory size requested to be allocated; and responding to the memory allocation request. The embodiment of the invention also discloses a memory management device. The method and the device have the advantages of allocating the best matched available memory fragment for the memory allocation request, increasing the reusability of the memory and the request processing efficiency, maximizing the service efficiency of the memory resource, improving the processing speed of the entire system and providing better user experience.

The invention provides a multimedia question-answering system and method based on an intelligent mobile terminal. The method includes: presetting a business server and a multimedia data storage computing server; allowing a user to log in on the business server through the intelligent mobile terminal, and setting user labels; acquiring question list data of all questions containing the user labels from the business server through the intelligent mobile terminal when the questions needs to be checked, and checking the required questions to obtain related multimedia data for playing; allowing the user to select the user labels from the business server through the intelligent mobile terminal when questions need to be established or answering is needed, allowing the user to upload related multimedia data and the user labels to the multimedia data storage computing server. By the method, the questions can be answered in a multimedia data manner, the questions can be categorized and presented to the user according to the user labels, repeated utilization rate of the questions can be increased, and full knowledge sharing is realized.