32 results about "Cyclic strength" patented technology

The invention provides a silica sand composition which comprises silica sand having a polymer coating and a first binder, wherein, the polymer coating is a cured second binder, and the first binder and the second binder are respectively one or more selected from the group consisting of an acrylic acid resin adhesive, an epoxy resin adhesive and a polyurethane adhesive. The invention also provides a preparation method for a formed body and the formed body prepared by using the method. The method comprises the steps of mixing of all the components of the silica sand composition, molding and curing of the first binder. The formed body prepared from the composition by using the method has good water permeability, high strength and an excellent strength retention rate, and has a compressive strength of 45 to 70 MPa when in a dry state, a compressive strength of 28 to 55 MPa when in a wet state, a cyclic strength of 20 to 45.5 MPa after 5 cycles, a strength loss rate of only 27 to 60% and a permeability coefficient of 3 to 7 cm/s.

The invention relates to a photocatalytic wastewater degradation reactor expansion method for in-situ counteraction of catalytic agglomerates, and belongs to the technical field of wastewater treatment. In the existing related technologies, the problems that a catalyst interception link is weak, the utilization of microwave energy is not ideal, the single-tank wastewater treatment capacity of a reactor is small, the major cyclic strength of internal liquid is insufficient, the ending time of degradation reaction is difficult to discern, and catalytic agglomerates can not be subjected to in-situ forced counteraction, and the like exist, and the method is designed for solving the problems. The method disclosed by the invention comprises the following main steps: drawing in the microwave irradiation range by using a metal cage; bunching and raising a bubble flow by using a megaphone-shaped component; expanding the size of a reactor; intercepting nano photocatalyst particles level by level by using an external cascaded three-level backwash filter; carrying out in-situ forced counteraction on catalyst agglomerates by using ultrasonic waves emitted from the bottom of the reactor, and simultaneously, cleaning a quartz tube; and monitoring a reaction process by using an ozone sensor, and automatically controlling related power switch mechanisms by using sensing electric signals.

The invention relates to a microwave photocatalytic coupling type waste water degrading device with a reinforced catalyst interception procedure and belongs to the technical field of waste water treatment. The existing microwave photocatalytic degradation technology of industrial waste water containing organic pollutants has such problems as weak catalyst interception procedure, small single-tank waste water treatment capacity of reactor and insufficient general circulation strength of internal liquid, and the like, and the scheme is used for integrally solving the problems under the condition of taking the coupling action into account. In the scheme, a metal cage is spanned near the periphery of a quartz tube provided with an electrodeless ultraviolet lamp in the reactor to constrain the microwave in a limited space, so as to greatly expand the design volume of a non-microwave irradiation space to greatly improve the single-tank treatment capacity; a horn-shaped member used for reinforcing liquid circulation is spanned right below the metal cage; an external cascaded three-level back wash filter is used for precisely intercepting catalyst particles; and the material selection of the filter element is not limited.

The invention relates to a high-capacity reactor with a catalyst agglomerate digestion mechanism for photocatalytic wastewater degradation, and belongs to the technical field of wastewater treatment. In the existing related technologies, the problems that microwave energy is wasted, the treatment amount for single-tank wastewater is low, the intensity of internal general circulation is insufficient, the rising route of air bubbles is short, the oxygen supply concentration degree of key areas is low, an entrapment phase for catalyst particles is weak, the endpoint time of a degradation reaction is difficult to distinguish, catalyst agglomerates cannot be powerfully digested in situ, and the like exist, and the scheme disclosed by the invention aims at the series of problems. In the scheme, microwave is restrained by a metal cage, and the structure allows large-amplitude capacity expansion for the reactor; oxygen supply for key areas is enhanced by the structure of the scheme; the structure comprises an external cascaded three-stage backwash-type filter used for entrapping the catalyst; and the structure is capable of powerfully digesting the catalyst agglomerates in situ, ultrasonically cleaning a quartz tube, and automatically turning off the related power supply immediately when the degradation reaction arrives at the endpoint, thus avoiding energy waste and secondary pollution.

The invention relates to a nondestructive prediction method for the low-cycle fatigue life of a thermal aging material by using hardness. The nondestructive prediction method is characterized by comprising the following steps: S1, measuring and obtaining a strain-life curve of an unaged and aged material; s2, measuring the surface hardness of the material in non-aging and thermal aging processes,and establishing a mathematical relationship between the material hardness and a cyclic strength coefficient K'and a cyclic strain hardening index n '; s3, substituting the mathematical relationship between the K' and the n 'established in the step S2 into a Baquiin-Manson-Coffin equation, and determining a mathematical relationship between the surface hardness and the fatigue life; and S4, obtaining a universal relationship between the hardness and the predicted fatigue life. The method is scientific and reasonable in design and simple, convenient and quick in measurement, improves the prediction efficiency, and can provide guarantee for the use safety of materials; meanwhile, only data of non-aging and a small amount of aging tests are needed, so that the fatigue life of the material atthe used aging temperature and duration is predicted, and the number of experiments is greatly reduced.

The invention relates to a high-capacity reactor for fine interception of catalyst particles and photocatalytic wastewater degradation, belonging to the technical field of wastewater treatment. The following problems exist in the prior related art: the microwave energy is wasted, the single-tank wastewater treatment capacity is smaller, the internal high cyclic strength is insufficient, the bubble rising path is shorter, the oxygen supply concentration ratios in key areas are insufficient, the catalyst particle interception link is weaker, the degradation reaction endpoint is difficult to distinguish, catalyst agglomerates can not be dispersed in situ by strong force, and occurrence of catalyst agglomeration can not be perceived immediately. The invention aims at the problems. The reactor uses a metal cage to constrain microwaves. The structure of the reactor allows substantial capacity expansion of the reactor, reinforces oxygen supply in the key reaction areas, finely intercepts the catalyst particles, can disperse the catalyst agglomerates in situ by strong force, simultaneously carries out ultrasonic cleaning on quartz tubes incidentally, can automatically and immediately turn off the related power supply when degradation reaction reaches the endpoint, and can detect main catalyst agglomeration incentive parameters.

The invention relates to a photocatalysis wastewater degradation reactor expanding method for automatically checking aggregation main cause parameters and belongs to the technical field of wastewater treatment. The problems that the catalytic agent is eroded, the microwave energy is wasted, the single-tank wastewater treatment amount is small, the cyclic strength of the inner liquid is insufficient, the degradation terminal point is difficultly identified, a catalyst agglomeration cannot be powerfully dissipated in situ, the catalyst agglomeration cannot be timely observed and the like exist in the conventional related technologies. The method aims to solve the series of problems. The method comprises the following steps: drawing the microwave irradiation range through a metal cage, bunching the rising bubble flow through a horn-shaped member, expanding the size of the reactor, gradually intercepting catalyst particles by using an external cascade three-stage backwash filter; dissipating the catalyst agglomeration by using the ultrasonic in-situ power at the bottom of the reactor, and incidentally cleaning the quartz tube; sensing the reaction progress by using an ozone sensor, and automatically controlling the related power switch mechanism by using a sensing electric signal; and automatically checking aggregation main cause parameters, and automatically giving an alarm when the index exceeds the limit.

The invention relates to a large handling capacity photocatalytic reactor for wastewater degradation by automatic stop at a process ending, and belongs to the technical field of wastewater treatment. Existing related background technologies have the problems of loss of nanometer photocatalyst, microwave energy dissipation, small wastewater handling capacity of single tank of the reactor, insufficient large circulating strength of inner liquid, difficult of distinguishing reaction ending, incapability of in-situ strong dissipation of catalyst conglobation and the like. The problems are solved by the scheme. In the scheme, a metal cage is used to constrain microwave, so as to greatly expand the reactor. According to the structure of the reactor, the large circulation of inner liquid is strengthened. An external cascaded three-level back-wash filter is beneficial for finely intercepting catalyst particles. The catalyst conglobation can be strongly dissipated in situ due to the structure, and meanwhile, an ultrasonic cleaning quartz tube is arranged. According to the structure, associated power supply can be automatically and immediately closed when the degradation reaction reaches the ending, so that energy injection is stopped, meanwhile, residual ozone generating process is terminated, and therefore, secondary pollution can be avoided.

The invention relates to a method for expanding the capacity of a reactor capable of actively detecting agglomeration incentives and used for photocatalytic wastewater degradation, belonging to the technical field of wastewater treatment. The following problems exist in the prior related art: the microwave energy is wasted, the single-tank wastewater treatment capacity is smaller, the internal high cyclic strength is insufficient, the oxygen supply concentration ratios in key areas are insufficient, the catalysts run away, the degradation reaction endpoint is difficult to distinguish, catalyst agglomerates can not be dispersed in situ by strong force, and occurrence of catalyst agglomeration can not be perceived timely. The invention aims at the problems. The method comprises the main steps of constraining microwave irradiation airspace with a metal cage to be convenient for substantial capacity expansion of the reactor; releasing the bubble flow to the key degradation reaction areas in a concentrated manner; using an external cascaded three-stage back-flushing filter to intercept the catalysts by stages; using ultrasonic waves from the bottom of the reactor to disperse the catalyst agglomerates in situ by strong force, and simultaneously cleaning quartz tubes incidentally; using an ozone sensor to perceive the degradation endpoint, and automatically disconnecting the power supply at the degradation endpoint; and automatically detecting the tendency of catalyst agglomeration.

The present invention is polyester tape yarn excellent in mechanical strength and dye affinity, and, therefore, suitable as fancy work yarn formed through uniaxial orientation of polyester having the ultimate viscosity of 0.7 or more, and has the tensile strength of 1.0 cN/dt or more, the Knot strength represented by the below-mentioned formula (1) of 0.8 cN/dt, the Loop strength represented by the below-mentioned formula (2) of 1.8 cN/dt or more, and the yarn width of 0.5 mm or more. Knot strength: <paragraph lvl="0"><in-line-formula>Knot strength (cN/dt)=node strength (N)x100/fineness (dt) Formula (1) </in-line-formula>Loop strength: <paragraph lvl="0"><in-line-formula>Loop strength (cN/dt)=scratch strength (N)x100/fineness (dt) Formula (2) </in-line-formula>

The invention relates to a high-capacity reactor provided with an agglomeration incentive detection mechanism and used for photocatalytic wastewater degradation, belonging to the technical field of wastewater treatment. The following problems exist in the prior related art: the microwave energy is wasted, the single-tank wastewater treatment capacity is smaller, the internal high cyclic strength is insufficient, the bubble rising path is shorter, the oxygen supply concentration ratios in key areas are insufficient, the catalyst particle interception link is weaker, the degradation reaction endpoint is difficult to distinguish, catalyst agglomerates can not be dispersed in situ by strong force and occurrence of catalyst agglomeration can not be perceived immediately. The invention aims at the problems. The reactor uses a metal cage to constrain microwaves. The structure of the reactor allows substantial capacity expansion of the reactor, reinforces oxygen supply in the key reaction areas, finely intercepts the catalyst particles, can disperse the catalyst agglomerates in situ by strong force, simultaneously carries out ultrasonic cleaning on quartz tubes incidentally, can automatically and immediately turn off the related power supply when degradation reaction reaches the endpoint, and can detect main catalyst agglomeration incentive parameters.

The invention provides a method for predicting the low-cycle fatigue life of a thermal aging material, and the method comprises the steps: S1, determining a fatigue strength coefficient sigma'f, a fatigue strength index b, a cyclic strength coefficient K and a cyclic strain hardening index n of the material when the material is not aged; determining a fatigue strength coefficient sigma'f, a fatigue strength index b, a cyclic strength coefficient K and a cyclic strain hardening index n of the material at different aging times, and establishing a function relationship with the aging time; s2, determining the relationship between the fatigue ductility coefficient epsilon'f and the aging time and between the fatigue ductility index c and the aging time according to K, n, sigma'f and b; s3, sigma'f, b, epsilon'f, c are substituted into a Basic-Manson-Coffin equation, and a low-cycle fatigue life prediction equation suitable for different aging times is obtained. According to the method, the problem that the low-cycle fatigue life of the material in thermal aging cannot be accurately predicted in the prior art is effectively solved.