36results about How to "High wear strength" patented technology

Self-sharpening wearing part having improved abrasion resistance and strength, which wearing part comprises at least a first and a second material part. The first material part is constituted by a casting body and the second material part is comprised of at least one elongated hard metal rod which is fixed in the first material part. The wearing part produces an auto-signal when the part must be changed due to wear.

The invention belongs to the technical field of catalysts, and in particular relates to a catalytic cracking catalyst and a preparation method thereof. According to the catalytic cracking catalyst, phosphorus aluminum glue is used as an adhesive; and in a catalyst preparation process, zinc oxide is added and is used as an auxiliary agent. The catalyst contains the zinc oxide, and the phosphorus aluminum glue is used as the adhesive; and the catalyst has the functions of improving the yield of propylene and increasing the aromatics content in gasoline. Compared with the catalyst which is high in cost and contains chlorine aluminum gel, the catalyst solves the problems of corrosion and discharging of hydrochloric acid gas and does not contain chlorine; the phosphorus aluminum glue is high in adhesion, so that the catalyst is high in abrasion resistance; and the preparation method is simple and feasible and is easy to implement.

The invention discloses an electromagnetic switch protective structure and a mounting method thereof. The electromagnetic switch protective structure comprises an electromagnetic switch body (1), a guide cylinder (2) mounted on the electromagnetic switch body (1), and an movable iron core draw bar (3) mounted on a movable iron core end surface (8). The guide cylinder (2) is provided with a U-shaped positioning snapping groove (4), and the movable iron core draw bar (3) is provided with a positioning snapping groove (5). The electromagnetic switch protective structure also comprises a bowl-shaped rubber sealing cover (6), the bottom of the bowl-shaped rubber sealing cover (6) is provided with a central hole, the portion of the central hole is snapped inside the positioning snapping groove (5), and an opening end is mounted inside the U-shaped positioning snapping groove (4). According to the electromagnetic switch protective structure, the U-shaped positioning snapping groove and the positioning snapping groove achieve the positioning of the bowl-shaped rubber sealing cover and further achieve the sealing of the periphery of the guide cylinder to complete the protection to the movement of the movable iron core of an electromagnetic switch; meanwhile, an air exhaust device on the bowl-shaped rubber sealing cover can well release the negative pressure of the electromagnetic switch.

Disclosed is a thin woven fabric wherein thermoplastic synthetic fibers of fineness from 5 to 30 dtex are disposed in at least some of the warp and weft threads of a woven fabric and the number of intersections of the warp and weft threads of said woven fabric is from 23000 to 70000 / 2.54 cm2. Said woven fabric in the thin woven fabric is subjected to a silicone resin treatment.

The invention discloses an alternation type flow instrument durability experimental facility. The alternation type flow instrument durability experimental facility comprises at least one water tank, at least one water pump matched with the at least one water tank, a first experimental pipeline and a second experimental pipeline, wherein a plurality of instruments to be tested are arranged in the first experimental pipeline, and a plurality of instruments to be tested are arranged in the second experimental pipeline. According to the alternation type flow instrument durability experimental facility, the design that two water supply systems and the two experimental pipelines are combined is adopted; during a whole durability test, the two sets of water supply systems are kept to be in a stable operating condition and are prevented from being impacted by an abrasion test, the reliability of the test is guaranteed, and the service life of equipment is guaranteed; meanwhile, the instruments to be tested can be converted to be in different operating states rapidly, high abrasion strength is achieved, and both the temperature alternation mode and the flow alternation mode are achieved.

A NOx reduction catalyst which is composed of a molded body that contains a catalyst component, while having microcracks that extend in the shape of a network or a double-sided comb on the surface of the molded body, and which is configured such that: the microcracks have a 95% crack width of 100 (mu)m or less; the variation coefficient of the crack area ratio is 0.7 or less; and the average of the crack area ratio is preferably 1-14%. A method for removing nitrogen oxides from a combustion exhaust gas, which comprises a step for processing a combustion exhaust gas containing nitrogen oxides in the presence of the above-described NOx reduction catalyst.

The invention relates to a preparation method of a gasoline desulfurization microsphere catalyst. The method is characterized by: adding activated zinc oxide accounting for 30-60wt% of the total dry basis of the catalyst, expanded perlite powder and / or diatomite accounting for 5-20wt% of total dry basis, and a nickel salt, in terms of nickel oxide, accounting for 10-30wt% of the total dry basis into chemical water for mixing and beating, and raising the temperature to 60-90DEG C, at the same time continuously adding a sodium aluminate solution and an aluminum sulfate solution with a concentration of 1-20 wt%, adjusting and controlling the flow ratio of the two solutions to maintain the pH of the whole slurry at 7.5-9.5; and with the total amount of alumina in the sodium aluminate and aluminum sulfate accounting for 5-20wt% of the total dry basis of the catalyst, atomizing the uniformly mixed material slurry into microspheres with an average particle diameter of 50-80 microns, then conducting washing with chemical water till sodium oxide is less than 1.0wt%, and after drying, carrying out roasting at a temperature of 450-650DEG C for 0.5-4 hours. The prepared catalyst has a pore volume of 0.1-0.4 ml / g, and is characterized by good strength, high activity, large sulfur capacity, as well as low loss of liquid yield and gasoline octane number in a gasoline desulfurization reaction.

The invention provides a solid silicon aluminum phosphorus molecular sieve forming method and a device. The device comprises a batching kettle and a pusher; the batching kettle is further connected with a vacuum pump; a stirrer is arranged in the batching kettle; the stirrer comprises a rotating shaft vertically arranged in the batching kettle and stirring vanes and a scraper frame arranged on therotating shaft. The side edge of the scraper frame fits with the inner wall of the batching kettle. The pusher is arranged at the discharge port of the batching kettle and is used for pushing materials and converting vertical discharging into horizontal discharging. By the use of the device, materials can be mixed more uniformly, and fewer bubbles are mixed into the slurry. The problem of hollowing after molding of silicon aluminum phosphorus molecules is solved, and the problem that materials are pasted on the kettle wall and pipelines are blocked is effectively alleviated.

The invention discloses a catalyst system for sulfur-hydrocarbon-containing desulfurization, a sulfur-hydrocarbon-containing desulfurization method using the catalyst system and a device for implementing the method. The catalyst system comprises a desulfurization auxiliary and a monolithic catalyst, wherein the active ingredient coating of the monolithic catalyst comprises 30-90wt% of active metal and 10-70wt% of substrate; the desulfurization auxiliary comprises 5-35wt% of alumina, 5-35wt% of a silicon oxide source and 30-90wt% of oxide of at least one metal of IIB, VB and VIB families; the desulfurization auxiliary is microspheres having average grain size of 20-200 microns; the weight ratio of the desulfurization auxiliary to the active ingredient coating of the monolithic catalyst is (1-9):1. The catalyst system provided by the invention has better desulfurization activity and desulfurization stability.

The invention relates to a spinning machine, in particular to an opening device of a free end spinning machine. The opening device is provided with metallic card clothing (3) or ring clothing (11) used for individually separating the fibers of the fed-in fiber strips. The opening device of the invention is characterized in that the metallic card clothing (3) is pre-bent according to the geometricshape of a supporting ring (2), the ring clothing (11) is provided with the required geometric shape of a processed part, the surface of the corresponding processed part is provided with a structure with at least two layers, wherein an outer layer (13) is a hard material layer which is partially or wholly made of extremely hard material component, and arranged on a base layer (12).

The invention relates to a gas denitration catalyst, in particular to a honeycomb denitration catalyst based on the selective catalytic reduction (SCR) technique, and a production method thereof. After a drying monomer with the catalyst composition is sawed, the catalyst is prepared through the following steps: (1) one end part of the monomer is put in an aluminum salt water solution with the density being 1.41-1.45kg / L for being impregnated about 5-12 seconds; (2) a blower is used to blow for 15-25 seconds, so as to blow off superfluous hardening liquid on the surface of the impregnated end part of the monomer; and (3) the monomer after being impregnated in the hardening liquid is calcined in a calciner and hardened. Therefore, the production process of the invention is simple and costs little, and the abrasion strength of the catalyst improved.

The invention relates to the field of catalysts for converting organic oxygen-containing compounds to olefins, and discloses a molecular sieve catalyst for preparing organic oxygen-containing compounds to olefins, a preparation method thereof, and a method for preparing organic oxygen-containing compounds to olefins. The preparation method of the olefin molecular sieve catalyst prepared from organic oxygen-containing compounds: mixing the first binder with an acid to make the first binder peptize; mixing the second binder with the obtained first binder sol to prepare Obtain a mixed binder sol; mix the high-silica ZSM-5 molecular sieve, mixed binder sol, and carrier and perform aging treatment; spray-dry, shape and roast the obtained slurry in sequence; obtain an organic oxygen-containing compound converted into an olefin Catalyst; also relates to a molecular sieve catalyst for preparing olefins from organic oxygen-containing compounds and a method for preparing olefins. The catalyst of the invention has excellent activity and service life, is more suitable for fluidized bed reactors, and can significantly improve the selectivity of low-carbon olefins when used in the reaction of organic oxygen-containing compounds to olefins.