48results about How to "High lateral compressive strength" patented technology

The invention relates to construction methods of assembling-type concrete structures, in particular to a cast-in-place section concrete construction method of an assembling-type concrete structure. The cast-in-place section concrete construction method comprises the steps that when an outer wall body is prefabricated, embedded parts and steel bar meshes are buried and additionally arranged inside an outer wall protective layer of a cast-in-place section correspondingly; a cast-in-place section formwork is connected to the inner side of a wall body structural layer through mutual-pulling screws and buckling pieces, wherein one end of each mutual-pulling screw is connected with a sleeve and the other end of each mutual-pulling screw penetrates out through a reserved hole in the cast-in-place section formwork, and the mutual-pulling screws are sleeved with PVC casing pipes. Cast-in-place section concrete is poured in grouting holes reserved inside the wall body structural layer. After the cast-in-place concrete reaches designed strength, the buckling pieces can be loosened, the cast-in-place section formwork can be disassembled, the mutual-pulling screws are rotated to enable the mutual-pulling screws to be separated from the sleeves, and then the mutual-pulling screws are drawn out from the PVC casing pipes. The cast-in-place section concrete construction method of the assembling-type concrete structure solves the problems that the surface of a warm-keeping protection layer cracks and deforms due to the through-wall screws and water seepage occurs in an outer wall, reduces the workload of outer wall face repairmen, and improves the pouring efficiency of the cast-in-place section concrete.

The invention provides an article storage apparatus which has a high earthquake resisting strength and can achieve weight saving and cost reduction. The article storage apparatus uses a lattice-shaped panel in which a plurality of rod-like members intersect, and is provided with a bottom panel forming a loading surface for an article to be stored, front and rear lattice-shaped panels provided in a rising manner in both front and rear end portions of the bottom panel, and side lattice-shaped panels provided in a rising manner in both side portions of the bottom panel. Further, side surfaces of the side lattice-shaped panels are provided with an upper reinforcing member attached along an upper end portion of the panel and having a higher flexure strength than that of the rod-like member. Further, there are leg portions provided having engagement portions capable of engaging with at least the upper reinforcing member and provided in a lower surface of the bottom panel. The engagement portions of the leg portions of the article storage apparatuses adjacent vertically to each other are engaged with at least the upper reinforcing member, at the time of piling a plurality of the article storage apparatuses. Since the article storage apparatus is reinforced by the upper reinforcing member, it is possible to manufacture the article storage apparatus having a high earthquake resisting strength.

The invention discloses a preparation technology of a catalyst used for high temperature catalytic decomposition of N2O. The preparation technology comprises the following steps: dissolving magnesium nitrate, cobalt nitrate, lanthanum nitrate, cerium nitrate, nickel nitrate and zirconium nitrate in water to form a mixed nitrate solution; adding ammonia water and aluminum hydroxide, and carrying out compacting, dehydrating, drying and baking to obtain a powder material; and uniformly rolling the powder material, desalinized water and a bonding agent, drying the rolled materials to obtain a granulation material, compacting the granulation material to form a porous cylinder, and calcining the porous cylinder to obtain the catalyst. The preparation technology has the following advantages: a co-precipitation method is selected, an active component reacts with a carrier substance precursor and a precipitating agent to realize co-precipitation, and the active component interacts with the carrier, so the active component is well and stably dispersed; and the active component and the carrier precipitate are commonly calcined at a high temperature of 1000-1300 DEG C, so the active component of the catalyst has good heat tolerance and difficulty loses, thereby the catalyst has the advantages of high efficiency, good stability and long service life.

The invention relates to a Claus tail-gas hydrogenation catalyst and a preparation method thereof. The Claus tail-gas hydrogenation catalyst is mainly characterized in that a carrier of the catalyst is made of silicon modified titanium and aluminum composite dry glue, a cementing agent, a chambering agent and an auxiliary agent, wherein the auxiliary agent is one or more of zinc oxide, iron oxide, magnesium oxide or salts thereof; and an active component is a ternary active component consisting of molybdenum or tungsten and cobalt as well as nickel. The Claus tail-gas hydrogenation catalyst is prepared by adopting an immersion method preparation process. The catalyst has the characteristics of no pollution in the preparation process, low temperature SO2 hydrogenation activity, hydrogenolysis activity of organic sulfurs of CS2, COS and the like and good hydrolysis activity, can be used in a Claus tail gas hydrogenation process, and has remarkable energy-saving and consumption-reducing effects because the use temperature of the Claus tail-gas hydrogenation catalyst is lower than over 60 DEG C as comparison with the common Claus tail-gas hydrogenation catalyst.

The invention discloses a preparation method of an aluminum oxide carrier. The method comprises the following steps: (1) bottom water is added into a pressure zone and a reaction zone of a reactor, ionic liquid I is added, and gelling temperature is adjusted; (2) an aqueous solution of alkaline aluminate is added into the reactor, at the same time CO2 enters the reaction zone from the lower part of the reaction zone, CO2 and the aqueous solution of alkaline aluminate are neutralized for carrying out a sol forming reaction, when water in the pressure zone enters the reaction zone through a semi-permeable membrane, the sol concentration is kept in a concentration range, and the reaction is continuously carried out; (3) after the reaction ends, ultrasonic vibration at the bottom is started, and after aging, washing and drying are carried out, pseudo-boehmite is obtained. (4) mixing and kneading, moulding, drying and calcination of the pseudo-boehmite prepared in the step (3), an adhesive and ionic liquid II are carried out, and the aluminum oxide carrier is obtained. The aluminum oxide carrier has the advantages of high specific surface area, large aperture and pore volume, high lateral compressive strength, and low abrasion; and the product is adapted to be the carrier of boiling bed wax oil, residual oil hydrogenation catalysts.

The invention relates to a road roadbed structure, and relates to the technical field of road engineering. A first lime-soil layer is laid on a foundation, a second lime-soil layer is laid on the first lime-soil layer, a gravel stabilization layer is laid on the second lime-soil layer, and a surface layer is laid on the gravel stabilization layer; a bearing pile is arranged in the first lime-soillayer in an inserted mode, and the lower end of the bearing pile is arranged in the foundation in an inserted mode after penetrating through the first lime-soil layer; a reinforcing net is arranged between the first lime-soil layer and the second lime-soil layer, and the reinforcing net is arranged on the bearing pile in a sleeving mode; a triangular pipeline is fixedly arranged on the upper surface of the second lime-soil layer, the bottom side of the triangular pipeline abuts against the upper surface of the second lime-soil layer, and a water seepage hole is formed in the side edge of the triangular pipeline; and the upper surface of the second lime-soil layer is paved with a leveling layer, and the triangular pipeline is buried in the leveling layer. According to the road roadbed structure, the bearing pile is arranged so that the connection strength between the first lime-soil layer and the foundation is strengthened, the lateral load-resisting strength of a roadbed is strengthened; and the reinforcing net is arranged, so that the connection strength between the lime-soil layers is strengthened, and layering is avoided.

The invention discloses a quasi-three dimensional enhanced composite dot matrix interlayer structure and a manufacturing method thereof. The dot matrix interlayer structure is composed of orthogonally-woven rectangular fabric cloth or a prepreg strip, a three-dimensional foam core and a panel pavement layer. The designability of the composite structure is ingeniously utilized, and a new quasi-three dimensional weaving structure is designed to serve as a dot matrix core and is simultaneously cured and formed with a panel. On the premise that component materials are the same, compared with existing dot matrix interlayer structures (such as a grid interlayer structure, a honeycomb interlayer structure, a foam interlayer structure and a three-dimensional dot matrix interlayer structure), the interface strength between the panel and the core is greatly improved, the problem that fiber in a conventional dot matrix interlayer structure core pavement layer is not continuous is solved, and therefore the bending strength, the shearing strength, the lateral pressure strength and the like of the interlayer structure are improved, and very important significance is achieved for the development of the composite three-dimensional structure enhancing technology.

The invention discloses a catalyst carrier, which belongs to the technical field of the protection and supporting product structure of a fixed bed catalyst which is a solid catalyst product used in industries of oil refining, chemicals, gas processing and the like. The catalyst carrier comprises a central hole, a convex part, a top part, a cylinder, a concave part, a groove and a body, wherein the body comprises the cylinder and at least one convex part arranged around the cylinder, which are formed in one piece; the cylinder has a cylindrical solid structure, and a through central hole is arranged along an axial direction; and the at least convex part has a blade cylinder-shaped, toothed or arch cylinder-shaped solid structure, and the protruding top part of the at least one convex part is provided with at least one groove running through the axial direction. When the technical scheme of the invention is adopted, lateral loading capacity is improved, the intensity of lateral pressureis improved, the voidage of a supporting protective agent is improved, and the pressure drop of the bed of the catalyst is reduced.

The invention relates to the technical field of research and production of building insulation materials, and discloses a thermal-insulating and fireproof sandwich plate adopting foaming cement as a core veneer. Wood chip fiber is used as a panel, the foaming cement is used as the core veneer, a wood-face foaming cement sandwich plate is formed by pressing adopting a cold pressing preparation technology, and the panel can provide a better protective effect for the foaming cement sandwich plate; the fireproof strength of the foaming cement core veneer is improved, the defects of low strength, easy cracking and slag separation, bad decorating property and the like are solved, and the edgewise compressive strength, the bending strength, the impact toughness and the other mechanical strength of the sandwich plate can be greatly improved; and the advantages of good machining property, inorganic thermal insulation material heat-insulating property, sound insulation property, good flame retardant property and the like can be achieved, and the thermal-insulating and fireproof sandwich plate adopting the foaming cement as the core veneer can be applied to the field of decorative sheets, internal parting walls, fireproof door cores, fireproof wallboard and the like of the industrial and civil constructions.

The invention relates to a preparation method of a TiO2 / gamma-Al2O3 composite carrier material. The method includes uniformly mixing mesoporous TiO2 crystal whisker and alumina sol, with the weight percent of the mesoporous TiO2 crystal whisker being 2-50 wt% and the weight ratio of dry mixing materials to water being 1:5-20; heating the material mixture to 60-90 DEG C, adding dropwise an inorganic acid to adjust the pH to be 2-3.5 and maintaining for 2-24 h; adding dropwise an alkaline solution to adjust the pH to be 9 to form Ti-Al-H2O composite jelly; ageing for 1-6 h, washing with deionized water to be neutral, filtering and drying in air; and calcining at 500-800 DEG C to obtain the TiO2 / gamma-Al2O3 composite carrier material. The method is simple in operation and low in cost. A molybdenum-nickel catalyst prepared from the carrier has excellent deep hydrodesulfurization performance, and is capable of reducing the sulfur content from 5000 [mu]g / g in inferior diesel oil to below 50 [mu]g / g, thus achieving the Europe IV diesel oil standard.

The invention discloses a forming method and application of a catalyst, and the forming method comprises the following steps: (1) granulating the catalyst to obtain catalyst particles of 0.5-5 mm; (2) crushing and screening the catalyst particles obtained in the step (1) to obtain 30-80-mesh catalyst particles; and (3) mixing the catalyst particles obtained in the step (2) with a binder with a particle size of 30-80 meshes, and carrying out tabletting molding to obtain the molded catalyst, the catalyst comprises an active component; the active component comprises an iron element. According to the invention, the binder and the active component of the catalyst form strong interaction, the raw material molecule adsorption and catalysis process in the specific reaction process of carbon dioxide hydrogenation is enhanced, the reaction efficiency is greatly improved, and the stability of the strength and performance of the catalyst particles under the long-time high-temperature reaction condition is ensured.

The invention discloses a hydrogenation catalyst and a preparation method thereof. The catalyst preparation method first prepares a wet filter cake material, then mixes it with an industrial pseudo-boehmite raw material, adds an extrusion aid and kneads it, and then it is dried and roasted to obtain hydrogenation Catalyst carrier; after further supporting active metal components, drying and calcining to obtain a hydrogenation catalyst. The hydrogenation catalyst prepared by the method of the invention has good mechanical properties, high strength and good wear resistance, and is especially suitable for the fluidized bed hydrogenation process. The preparation method of the hydrogenation catalyst has simple process and low energy consumption, and is suitable for large-scale production of the fluidized bed catalyst.

The invention relates to construction methods of assembling-type concrete structures, in particular to a cast-in-place section concrete construction method of an assembling-type concrete structure. The cast-in-place section concrete construction method comprises the steps that when an outer wall body is prefabricated, embedded parts and steel bar meshes are buried and additionally arranged inside an outer wall protective layer of a cast-in-place section correspondingly; a cast-in-place section formwork is connected to the inner side of a wall body structural layer through mutual-pulling screws and buckling pieces, wherein one end of each mutual-pulling screw is connected with a sleeve and the other end of each mutual-pulling screw penetrates out through a reserved hole in the cast-in-place section formwork, and the mutual-pulling screws are sleeved with PVC casing pipes. Cast-in-place section concrete is poured in grouting holes reserved inside the wall body structural layer. After the cast-in-place concrete reaches designed strength, the buckling pieces can be loosened, the cast-in-place section formwork can be disassembled, the mutual-pulling screws are rotated to enable the mutual-pulling screws to be separated from the sleeves, and then the mutual-pulling screws are drawn out from the PVC casing pipes. The cast-in-place section concrete construction method of the assembling-type concrete structure solves the problems that the surface of a warm-keeping protection layer cracks and deforms due to the through-wall screws and water seepage occurs in an outer wall, reduces the workload of outer wall face repairmen, and improves the pouring efficiency of the cast-in-place section concrete.

The invention discloses a catalyst for performing high-temperature catalytic decomposition of N2O and a preparation method of the catalyst and belongs to the technical field of environment-friendly catalytic materials and atmospheric pollution treatment. The catalyst for performing high-temperature catalytic decomposition of N2O is prepared by taking a solid solution containing titanium, magnesium, zirconium and cerium as a carrier, taking transition metal oxides supported by the carrier as active components of the catalyst, and adding a suitable quantity of accessory ingredients, wherein the transition metal oxides account for 1-15% of the total mass of the catalyst; the accessory ingredients account for 1-5% of the total mass of the catalyst; the accessory ingredients are selected from one or several of scandium oxide, ferric oxide, sodium oxide, chromic oxide, yttrium oxide and rare earth oxide. Compared with the foreign mainstream products, the catalyst for performing high-temperature catalytic decomposition of N2O is uniform in appearance, high in edgewise compressive strength, large in specific surface area and low in shrinking ratio. The activity detection shows that the activity of the catalyst of our company is equivalent to the activities of the foreign mainstream products at the temperature of about 860 DEG C; the catalyst disclosed by the invention is excellent in activity at high and low temperatures, wide in temperature zones of activity and excellent in high-temperature activity stability.

The invention relates to a preparation method of a catalyst for hydroxypivalaldehyde liquid phase hydrogenation preparation of neopentylene glycol. The catalyst comprises 20-65wt% of copper oxide, 15-50wt% of alumina, 2-25wt% of zinc oxide, 0.1-5wt% of tin oxide, 0.5-25wt% of alkaline earth oxide and 0-20wt% of titanium oxide and / or zirconia. The compounds containing copper, aluminum, zinc, tin and alkaline earth metal are mixed to form a mixture aqueous solution according to a certain ratio, the solution and an alkaline precipitant are added into a nanometer oxide-containing dispersion liquid in parallel, the mixture undergoes a precipitation reaction, the reaction product is aged and filtered, and the filter residues are washed, dried, roasted and compressed to form a molded catalyst. The catalyst prepared by the method has high activity and good selectivity in hydroxypivalaldehyde liquid phase hydrogenation preparation of neopentylene glycol, can promote 1115 ester conversion, can effectively improve liquid-repellency, and has high catalyst intensity and good stability.