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The invention discloses a method for preparing biomass briquette by virtue of lower-calorific-value coal. The method disclosed by the invention comprises the following steps of: after biomass is crushed, presoaking the crushed biomass in alkali liquor, and carrying out high-temperature stewing on the biomass in the alkali liquor; adding the crushed lower-calorific-value coal and a right amount of additives into the alkali liquor; and finally, uniformly mixing water with the obtained mixture, and forming the obtained product in a forming machine at a high pressure so as to obtain a biomass briquette product. According to the method, the lower-calorific-value coal and the biomass are mixed to produce the biomass briquette, the advantages of the coal and the biomass are fully utilized to improve the combustion characteristics and the heat utilization rates of the coal and the biomass, the efficient and clean utilization of limited coal resources, especially low-quality coal, in China is realized, and the resource and energy utilization of agricultural wastes, such as corn straws, is realized, therefore, the method has a great significance to the nearby efficient conversion of biomass resources such as lower-calorific-value coal resources and corn straws and the like and the improvement of the utilization efficiency of coal resources, and accords with the development of a clean coal technology of China.

A detection device of wall thickness on pipe consists of signal collection unit formed by measurement pole and step form ultrasonic wave probe, and ultrasonic wave detection system. Its detecting method includes making material of measurement pole be as the same with material of pipe to be detected and welding one end of measurement pole directly on pipe wall detection point of pipe to be detected.

The invention discloses a mixed working medium thermal circulating system and method for power and refrigeration cogeneration. In the system, an ammonia and water mixture is utilized as a working medium, and the middle/low temperature heat is utilized as a heat source. The method comprises the following steps: heating the ammonia water working medium to obtain superheated steam; introducing the superheated steam into a turbine to do work; introducing the exhaust steam of the turbine into a rectification tower to supply heat for the rectification process; introducing the ammonia generated by the rectification tower into an evaporator after condensing, undercooling and throttling; throttling a dilute solution subjected to waste heat recovery, introducing the throttled dilute solution into aabsorber, mixing with the ammonia from the evaporator and condensing; and introducing a heat source into a steam generator firstly, and then introducing the heat source into a waste heat solution heat exchanger. The steam generator adopts the ammonia water strong solution as the working medium, the variable temperature evaporation feature of the ammonia water strong solution is well matched with the temperature of the heat source, thus the irreversible loss of the heat exchange process in the steam generator is reduced; simultaneously the exhaust steam of the turbine directly enters into the rectification tower to supply the rectifying heat without condensation, thus the irreversible loss caused by the variable temperature condensation of the ammonia water working medium is avoided; and the mixed type heat transfer is adopted, thus the irreversible loss of the heat exchange process is reduced.

The invention discloses a thermodynamic cycle system and method for ammonia water mixed working medium power cooling combined supply. Ammonia water mixture serves as a working medium, and medium-and-low temperature heat serves as a heat source; the thermodynamic cycle system includes a power cycle and a refrigerating cycle; and the power cycle taking the ammonia water mixture as the working medium, the characteristic of temperature-variable evaporation of the working medium is utilized to be excellently matched with a sensible heat source, meanwhile, the temperature-variable condensation of the working medium is utilized to provide heat for the re-boiling process of a tower kettle and the preheating process for partial feeding material of a rectifying tower of the refrigerating cycle. Through the system integration, the high-temperature part of the external heat source is utilized for power cycle, the low-temperature part of the external heat source and the heat extraction of the power cycle are utilized for the refrigerating cycle, the matched temperature and stepped utilization of heat are realized, and compared with the typical dividing system, the performance of the system is improved.

The invention belongs to the technical field of crop straw treatment, and relates to straw surface treatment, particularly a straw surface treatment and graft modification method. In order to remove wax and silicon on the straw surface, eliminate the influence that the wax and silicon are unfavorable to adhesion, and enhance the wettability of water for the straw, the invention discloses a straw surface treatment and graft modification method which comprises the following steps: cleaning the straw, carrying out mixed base solution pretreatment, pulverizing the pretreated straw, and adding a silane coupling agent-methacrylic acid mixed graft modifier and an ethanol-water mixed solution to carry out graft modification. The method provided by the invention can remove the wax and silicon on the straw surface, and change the surface properties of the straw; and the treated straw has higher wettability and can enhance the physicochemical cohesive action with various adhesives. The method provided by the invention is also applicable to surface treatment of straws of rice and other crops, and can reinforce the surface wettability of the crop straw.

A composite adsorbent for adsorbing the organic and inorganic pollutants from aqueous solution is prepared from powdered coal ash through ball grinding, adding NaOH solution, magnetic stirring while reacting, adding H2SO4 solution, reacting while stirring, treating with ammonia water, baking and pulverizing.

The invention relates to a method for catalytic conversion preparation of a hexahydric alcohol from jerusalem artichoke as a raw material. The method is characterized in that a raw material of natural biomass jerusalem artichoke (mainly comprising fructose-based polysaccharide carbohydrates) undergoes a reaction at a temperature above 20 DEG C under hydrogen pressure of 1 to 13MPa in the presence of water as a solvent and a catalyst or a mixed catalyst for at least 5 minutes, wherein the catalyst comprises acidic carriers and one or more of transition metals of iron, cobalt, nickel, copper, ruthenium, rhodium, palladium, iridium and platinum loaded on the acidic carriers; and the mixed catalyst comprises solid acids and a metal hydrogenation catalyst comprising carriers and one or more of transition metals of iron, cobalt, nickel, copper, ruthenium, rhodium, palladium, iridium and platinum loaded on the carriers. Through one-step catalytic conversion, high-efficiency, high-selectivity and high-yield preparation of a hexahydric alcohol such as mannitol and sorbitol from jerusalem artichoke as a raw material is realized.

The invention relates to an integral cleaning robot orienting sand beach and sea surface amphibious enteromorpha garbage. The integral cleaning robot comprises an amphibious walking trolley, a collecting mechanism, a transmission mechanism, a distinguishing conveying mechanism and an extrusion mechanism, wherein the collecting mechanism, the transmission mechanism, the distinguishing conveying mechanism and the extrusion mechanism are arranged on the walking trolley; the collecting mechanism is used for collecting Enteromorpha; the transmission mechanism is used for transmitting the enteromorpha and the garbage collected by the collecting mechanism; the distinguishing conveying mechanism receives the enteromorpha and the garbage transmitted from the transmission mechanism, and respectivelyconveys the enteromorpha and the garbage; the extrusion mechanism performs extrusion forming on the enteromorpha conveyed in a distinguishing manner; the distinguishing conveying mechanism comprisesa rotatable first sieving roller and a rotatable second sieving roller; the first sieving roller is positioned under the output end of a conveying belt of the transmission mechanism; the rotating direction of the first sieving roller is adjustable in two directions; the second sieving roller is positioned at the downstream of the conveying belt, and the height of the second sieving roller is positioned between the conveying belt and the first sieving roller; the second sieving roller is arranged in a way of vertically approaching to the conveying belt and the first sieving roller; the rotatingdirection of the second sieving roller is opposite to the rotating direction of a support roller of the conveying belt; and the first sieving roller and the second sieving roller are arranged in a way of being parallel to the support roller.

The invention discloses a hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst as well as a preparation method and application thereof. According to the composite optical catalyst, by taking graphitized carbon nitride as a carrier, laminated hexagonal boron nitride modifies the graphitized carbon nitride carrier. The preparation method comprises the following steps: mixing the hexagonal boron nitride with a graphitized carbon nitride precursor; and calcining the mixed precursor to obtain the hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst. The hexagonal boron nitride modified graphitized carbon nitride composite optical catalyst disclosed by the invention has the advantages of being environmentally friendly, fully free of metal doping, large in specific surface area, high in photoproduction electron-hole separating efficiency, high in optical catalytic activity, good in stability, corrosion-resistant and the like. The preparation method has the advantages of being simple, low in cost of raw materials, less in energy consumption, easy to control conditions and the like. The composite optical catalyst disclosed by the invention is used for degrading dye wastewater and has the advantages of being simple in application method, stable in optical catalytic performance, high in corrosion resistance, high in dye wastewater degrading efficiency.

The invention discloses a combined type refrigeration system and method based on coupling between a direct cycle and a reverse cycle. According to the combined type refrigeration system and method based on coupling between the direct cycle and the reverse cycle, medium-and-low-temperature waste heat or solar energy or the like serves as a driving heat source. The combined type refrigeration system based on coupling between the direct cycle and the reverse cycle comprises three subcycles, wherein the subcycles comprise an acting subcycle, an absorption refrigeration subcycle and a compression refrigeration subcycle, the higher-temperature portion of the medium-and-low-temperature heat source is used for driving the acting subcycle to do work, the lower-temperature waste heat of the medium-and-low-temperature heat source is used for driving the absorption refrigeration subcycle to carry out refrigeration, meanwhile, discharged heat of the acting subcycle is recycled by the absorption refrigeration subcycle, and the work done by the acting subcycle drives the compression refrigeration subcycle to enable the work to be converted into cold energy to be output. Energy input of the whole system comprises the medium-and-low-temperature heat source, and product output of the whole system comprises the cold energy. Compared with an independent absorption refrigeration system, heat efficiency and COP of the combined type refrigeration system based on coupling between the direct cycle and the reverse cycle are greatly improved.

The invention discloses a system for producing a 3.5-valent high-purity vanadium electrolyte and a method thereof. According to the invention, fluidized bed gas phase hydrolysis is employed for hydrolyzing high-purity vanadium oxytrichloride to vanadic anhydride, vanadic anhydride in a reduction fluidized bed is accurately controlled and reduced to the low-valent vanadium oxide with vanadium average valence of 3.5, under applied microwave field, the 3.5-valent high-purity vanadium electrolyte is dissolved at low temperature by adding water and a sulfuric acid solution, and the electrolyte is directly used in all-vanadium redox flow battery new electric pile. The method for preparing vanadic anhydride through fluidized bed gas phase hydrolysis has the advantages of short flow and high efficiency, arrangement of an inner member in the reduction fluidized bed realizes accurate regulation and control of valence of the reduction products, dissolving of vanadium oxide is promoted and the vanadium ions are activated through special chemical effect of the microwave field, the electrolyte is prepared through dissolving in a low temperature zone, and the electrolyte activity is greatly increased. The system has the advantages of short flow, high efficiency cleaning, and stable product quality, is suitable for large-scale industrial production, and has good economic benefit and social benefit.

The invention discloses a supramolecular polymerized carbon nitride photocatalyst and a preparation method and an application thereof. The supramolecular polymerized carbon nitride photocatalyst is prepared from melamine, cyanuric acid, urea and dimethyl sulfoxide through a molecular polymerization reaction and calcination. The supramolecular polymerized carbon nitride photocatalyst has the advantages of high specific surface area, high photocatalytic activity and the like, can efficiently degrade organic wastewater and is a novel visible light catalyst. The preparation method has the advantages of simple synthetic method, low raw material cost, less energy consumption, short time consumption, easy control of conditions and the like, is suitable for continuous large-scale batch productionand facilitates the industrial use. the supramolecular polymerized carbon nitride photocatalyst of the invention can be used for degrading the organic wastewater, has the advantages of good degradation effect and good stability, and has good practical application prospects.

The invention discloses a system and a method thereof for preparing a vanadium battery high-purity electrolyte. According to the invention, vanadyl trichloride is taken as a raw material, vanadyl trichloride is reduced to the low-valent vanadium oxide with vanadium average valence of 3.5 through liquid phase hydrolysis and fluidization, clean water and sulfuric acid are added for dissolving, further, ultraviolet ray is employed for activating the material to obtain the vanadium electrolyte, and the electrolyte is directly used in all-vanadium redox flow battery new electric pile. sensible heat and latent heat of the high temperature tail gas are recovered by high temperature tail gas combustion preheating powder vanadium material through a reduction fluidized bed, sensible heat of the reduction product is recovered through heat exchange of products and fluidization nitrogen, arrangement of an inner member in the reduction fluidized bed realizes accurate regulation and control of valence of the reduction products, vanadium ions are activated by ultraviolet ray, and the electrolyte activity is greatly increased. The system has the advantages of short flow, high efficiency cleaning, and stable product quality, is suitable for large-scale industrial production, and has good economic benefit and social benefit.

The invention discloses a digital printing color tape for light-color natural fiber textiles as well as a preparation method and an application of the digital printing color tape. According to the digital printing color tape for the light-color natural fiber textiles, an adhesive material taking water-based hot melt adhesive resins as the main components is mixed with dyes to prepare a digital printing and coating material; films (paper) are (is) coated with the digital printing and coating material by using a special device. A brand new digital printing color tape is prepared from different water-based hot melt adhesive resins and different coloring agents according to different transfer printing materials, wherein the digital printing color tape is simple and convenient in application method, relatively low in cost, is environment-friendly and is suitable for industrial continuous production. The digital printing color tape for light-color natural fiber textiles has the characteristics of simple preparation method, environmental protection effect, low energy consumption and low cost, has the advantages of high accuracy, unlimited color, no waste of production, quick response and wide application range, is capable of being used for directly printing the printed materials, and is excellent in industrial application effect.

The invention discloses a heat-accumulation temperature-regulation fiber and a preparation method thereof. In the fiber, a comb polymer phase-change material serves as an ingredient A, a fiber forming polymer serves as an ingredient B, wherein the ingredient A accounts for 20-60wt% of the fiber, and the ingredient B accounts for 80-40wt% of the fiber; and the fiber is prepared by a melting composite spinning method. The comb polymer phase-change material is poly3-pyrrolidyl or a copolymer of two poly3-pyrrolidyls at the molar ratio of (30:70)-(70:30) or a blend of two poly3-pyrrolidyls at the mixed mass ratio of (30:70)-(70:30); and the fiber forming polymer comprises at least one of copolyester, amide copolymer, polyethylene, polypropylene, poly4-methyl amylene-1, acrylonitrile-butene nitrile copolymer or polycaprolactam. The fiber is prepared by the melting composite spinning method.

The invention relates to a gradual depth method for removing metal ion impurities from a nickel anode electrolyte. The method is as below: extracting by using an extractant to remove Fe<3+>; adjusting the pH value of the solution to 0.5-3, then adding sulfide to generate CuS, PbS and CoS precipitate, and removing all the Cu<2+>, most of the Pb<2+> and a small amount of Co<2+>; using weak alkaline anion resin adsorption to remove Pb<2+>; and removing Co<2+> to obtain the nickel electrolyte. The method can realize gradual depth removal of the metal impurities, and ultimately meet the requirements of industrial production indexes on the contents of various metal ion impurities in nickel electrolyte.

The present invention relates to a recombinant Escherichia coli having phbCAB originated from Alcaligenes eutrophus and an overproduction method of polyhydroxyalkanoate using the same, more precisely, a recombinant Escherichia coli ‘MG1655/pTZ18U-PHB’ or ‘JIL938/pTZ18U-PHB’ having phbCAB originated from Alcaligenes eutrophus and an overproduction method of polyhydroxyalkanoate comprising the steps of preparing transformed Escherichia coli having phbCAB originated from Alcaligenes eutrophus, inoculating and culturing the cells (growth phase), inducing the production of polyhydroxyalkanoate in the recomibnant Escherichia coli (stationary phase and producing phase), and inducing the extracellular secretion of the polyhydroxyalkanoate from the recombinant Escherichia coli. The method of the present invention facilitates not only overproduction of polyhydroxyalkanoate such as polyhydroxybutyrate by a simple batch culture but also industrial use of biodegradable polyhydroxyalkanoate replacing conventional non-biodegradable plastics by its simple and easy fermentation, separation and purification process.

There are provided hyperthermostable proteases having an amino acid sequences represented by SEQ ID Nos. 1, 3 and 5 of the Sequence Listing or functional equivalents thereof and hyperthermostable protease genes encoding those hyperthermostable protease. There is also disclosed a process for preparation of a hyperthermostable protease by culturing a transformant containing the gene.

High-bulk density 9,9-di[3-phenyl-4-(2-hydroxyethoxy)phenyl]fluorene crystals are synthesized from 9-fluorenone and 2-[(2-phenyl)phenoxyl]ethanol in a benzene solvent with sulfuric acid as a catalyst and 3-mercaptopropionic acid as a cocatalyst, the purity (HPLC analysis) of the crystals is greater than 98%, the bulk density of the crystals is greater than 0.4g/cm<3>, and the crystals have good fluidity. The endothermic melting peak range of the crystals is 142-180 DEG C. An X-powder diffraction (XRPD) analysis result shows that the characteristic 2theta values of the crystals are 7.60(47), 15.60(57), 16.40(55), 17.20(48), 18.70(49), 19.00(67), 20.60(100), 21.50(38) and 23.7(40).