45results about How to "Economic unity" patented technology

The invention discloses a water recycling process used in a copper-based catalyst production process. The invention belongs to the technical field of copper-based catalyst preparation. According to the invention, a sodium nitrate aqueous solution obtained by precipitation and filtration of the copper-based catalyst, and a sodium nitrate aqueous solution obtained in a filter cake washing process are processed through a water-processing system with reverse osmosis as a core processing manner; when fresh water reaches a reutilization standard, the fresh water is reutilized in a production line; and concentrated sodium nitrate aqueous solution is subjected to multi-effect evaporation, such that a sodium nitrate product is obtained. The technology is suitable to be used in production processes of copper-based catalyst used in methanol synthesis, methanol cracking hydrogen production, gas-phase dehydrogenation, gas-phase hydrogenation, carbon monoxide low-temperature shift, and the like.

The invention relates to a control method of a clutch based on revolving speed and belongs to the field of clutch control. The control method provided by the invention is characterized that a clutch MAP figure control strategy is adopted in slipping stage of a clutch, the MAP figure lookup calculation is carried out according to the revolving speed difference of an output torque of the clutch and the input shaft of the clutch and the output shaft of the clutch, thereby controlling the position of the clutch; and driving intention of a driver is judged to output a clutch rotation speed target value curve according to the size and variable rate of an engine throttle; the D-value of the target value and actual value of the clutch revolving speed is calculated by virtue of PID (proportion integration differentiation), the position of the clutch is subjected to fine tuning, thereby meeting different driving intentions and travelling conditions. Compared with fuzzy control and a neural network, the control method provided by the invention has the advantages of small computational load, simple structure, and strong control instantaneity, and overcomes the delay problem of a controller singlechip caused by complicated control, and overcomes the influence from the variation in load of vehicles on the combined process; the dynamic property and economy of the automobile are unified by virtue of building MAP on a great deal calibration test, and the relation of the parameter characteristic and control objective in control process is clear and definite.

The invention provides a steel slag modifier with structural grinding aid and surface coating functions and a preparation method thereof. The steel slag modifier with the structural grinding aid and surface coating functions comprises the following raw materials, by weight, 5.0%-20.0% of ethylene glycol, 5.0%-20.0% of triisopropanolamine, 5.0%-20.0% of triethanolamine, 35.0%-70.0% of liquid paraffin and 15.0%-50.0% of kerosene. Compared with the prior art, the steel slag modifier are compounded by the raw materials, the stirring temperature, the stirring speed and the stirring time are controlled, a steel slag compounding agent with the structural grinding aid and surface coating functions is obtained, and the obvious effects on improving the grindability and dispersibility of steel slag are achieved. According to the steel slag modifier with the structural grinding aid and surface coating functions and the preparation method thereof, the energy consumption of steel slag grinding can be reduced, the production process is environment-friendly and pollution-free, furthermore, the components are simple, the cost is low, the unification of economy and environment friendliness is realized, the economic benefit and social benefit are obvious, and the popularization and application of steel slag ultrafine powder are facilitated.

The invention discloses a method for computing an optimal anchoring angle of a rock slope wedge, and belongs to the technical field of analyzing the stability of a rock slope and strengthening the rock slope. A security coefficient of the wedge-shaped slope serves as an objective function, the angle and the direction of anchoring force serve as optimization variables, constraint conditions such as the balance equation of the wedge, the yield condition of a structural surface and the boundary condition are combined, and the method which is used for computing the optimal anchoring angle of the wedge and can maximize the security coefficient is provided. The computing method can compute and obtain the optimal anchoring angle of the wedge accurately, easily and conveniently, has the advantages of being clear in concept, high in computing accuracy and the like, and brings convenience for engineering technicians to carry out optimal design for strengthening the wedge so as to achieve the purpose of being safe and economical.

The invention discloses a digger engine auto idling control method, characterized in that: setting engine sub-target speed lower than working-state target speed by 50-300r / min; setting high idling speed higher than low idling speed by 300-500r / min; setting precursor pressure threshold valve 5-20 Pa; setting first idle time and second idle time; in the working state, when precursor pressure is zero and lasts the first idle time, regulating to high idling state and lasting the second idle time, and then regulating to low idling state; when precursor pressure is greater than zero and less than the precursor pressure threshold, regulating the engine to the sub-target speed and when greater than the precursor pressure threshold, regulating the engine to the target speed. And the invention adopts two-stage speed reduction, overcoming the defect of high energy consumption caused by big rise and fall of engine speed; and uniting engine power, economy and quickness.

The invention discloses a method for calculating the optimal excavation slope ratio of a mine slope. The invention takes the mine slope as the research object, and establishes a multi-objective optimization non-linear mathematical programming model for the stability, safety and excavation economy of the mine slope. The model takes the maximum value of the safety factor and the maximum value of the excavation benefit as the objective function; and takes the excavation slope rate, the shear force and the normal force of the structural surface as the decision variables, and the balance equation constraints of the slope sliding mass , The yield condition of the structural surface is a constraint condition, and the gravity function constructed in the constraint condition can change with the change of the excavation slope rate, so that the constraint condition of the limit equilibrium of the slope sliding mass can be well connected with the mine slope Safety and economy, thus more in line with the actual mine slope excavation requirements; through the method of the present invention can directly obtain the optimal excavation slope ratio of the mine slope, so that the excavation benefit is the highest while the stability and safety factor is the largest, thereby achieving Unification of excavation economy and stability and safety.

The invention discloses a manufacturing method of a graphite-contained high-speed steel centrifugal composite steel core roller, and belongs to the field of mechanical casting. Chemical elements of B and N are introduced in a traditional high-speed steel component, MC type and / or M2C type dotted and / or blocky high-hard alloy carbides, nitrides and borides with the total area percentage of 20% to 35% are dispersed and distributed in a work layer base body structure; through carbide, nitride and boride modification, graphite is subject to two-step treatment of modification and inoculation, graphite is precipitated in an original structure, and therefore the high-speed steel roller has the advantages of the specific high-temperature wear resisting of traditional high-speed steel and meanwhile the problem that an original traditional high-speed steel roller is large in friction coefficient is solved; wear-resisting performance of the high-speed steel is fully developed, the lubricating effect between the roller and a workpiece in the rolling process is achieved, and happening of the steel bonding phenomenon is avoided; due to the heat conduction performance and the lubricating characteristic of graphite, the defects that the high-speed steel roller is sensitive to hot impact and hot-cracking susceptibility, steel bonding is prone to happening, and surface roughing is prone to happening can be overcome, and particularly when a finished product rack is used, the surface bright degree of a rolled material is obviously improved.