42results about How to "Simple and economical to operate" patented technology

This is a method of filtration of a liquid comprising steps of sequential filtration of said liquid through at least one deep bed medium producing at least one first filtrate followed by at least one membrane medium filtration producing at least one second filtrate, wherein said membrane medium is at least periodically within said deep bed media Many types of deep bed and membrane media can be used. The domain of using contact clarification (direct filtration) can be expanded towards greater solids concentration. Operation and backwash, is simplified, continuous filtration becomes possible. Water can be water from natural source water, process water, wastewater, aqueous or non-aqueous suspensions, emulsions, solutions. Treatment can include mechanical interception of suspended particles, chemical, physical chemical, electrochemical, and biological processes. In water and wastewater processing, control over suspended solids, BOD, COD, nitrogen and phosphorus compounds, bacteria and viruses, heavy metals, color, and other constituents can be dramatically improved as compared to conventional processes. The method can be accommodated in new and modified existing treatment systems.

A film of a polymer or polymer precursor such as an epoxy resin is autodeposited on an active metal surface and then used to form an adhesive bond directly between the metal surface and the surface of a rubber substrate. Excellent adhesion of the metal to the rubber is obtained without the need to either phosphate the metal surface or use a primer or adhesive other than the autodeposited coating.

The invention discloses an oxygen reduction catalyst including a pyrryl tetrazine ring and a preparation method of the oxygen reduction catalyst. Monomer (pyrryl)n-1 and 2,4,5-tetrazine (n is 1 or 2) react with a catalyst and an alkylate reagent, a pyrryl tetrazine ring polymer is obtained, the pyrryl tetrazine ring polymer is subjected to thermal treatment in an inert atmosphere, and finally the oxygen reduction catalyst easy to operate, economical, efficient, high in stability and high in catalytic activity is obtained. Industrial production is promoted.

The invention discloses a test device for simulating the tunnel excavation process. The test device comprises a test box. A dial indicator rack is suspended on the top of the test box. An embedded body is embedded in the bottom of the test box. The test box is filled with a soil mass simulation material. The embedded body comprises a first tunnel excavation test body, a middle partition test body and a second tunnel excavation test body. The first tunnel excavation test body and the second tunnel excavation test body are of the same structure. The first tunnel excavation test body sequentially comprises a primary support simulation layer, a secondary lining simulation layer and a mountain simulation piece from outside to inside. The mountain simulation piece comprises a plurality of plates which are arranged in parallel and detachably connected. By means of the test device, ground surface deformation data can be collected, stress data of a middle partition, a primary support and a secondary lining is collected at the same time, the process of simulating mountain excavation is changed into the process of taking out the simulation piece in a layered mode piece by piece through the platy layered mountain simulation piece, detachment is convenient, and the contour left after detachment is smoother.

The device has a piston syringe (11) for receiving the blood. A filter unit (10) is provided with a multi-layer film filter for separating the plasma. A piston pump (20) is set for generating low pressure in the filter unit. A plasma collection container (17) is arranged in a filter cartridge (13) and is tapered towards the filter unit. The filter cartridge is isolated after the plasma generation such that a tip (9) of the plasma collection container is set free for sample introduction into an analyzer.

A catamaran airship is tethered to a portable and mobile housing. The roof of the housing will be the landing and take-off place for the airship. Many types of vehicles—truck, ship—can be a mobile base for the housing and its airship. This is primarily a visual surveillance and long-range communication system for day and night, and in all-weather. This system can survey large areas over long periods of time, economically and noiselessly.

A method is provided for operating a device for modifying a substrate with an irradiating unit in which multiple cylindrical infrared emitters having longitudinal axes arranged parallel to one another are grouped together. The method includes the steps (a) specifying a total radiation output power as a function of the substrate modification to be achieved, (b) operating each infrared emitter at a desired operating output power, (c) specifying a desired radiation spectrum as a function of the substrate modification to be achieved, and (d) selecting the desired operating output power of each infrared emitter individually so that, when the output powers are added together, the desired radiation spectrum and the total radiation output power are obtained, (e) with the proviso that the infrared emitters are of an identical construction and that the total radiation output power deviates by a maximum of 15% from a specified desired value.

The invention discloses a dispersive droplet emulsion and a preparation method thereof. The preparation method comprises steps of mixing a hydrophobic organic solvent with a hydrophilic organic solvent according to a weight ratio of 1:20-1:2000 to obtain a dispersive solvent; and mixing the dispersive solvent with an aqueous inorganic salt solution to form the dispersed droplet emulsion, wherein the dispersive solvent and the aqueous inorganic salt solution are mixed in a static mixer. By feeding the dispersive solvent obtained by mixing the hydrophobic organic solvent with the hydrophilic organic solvent into the static mixer to be mixed with the aqueous solution, the dispersive homogeneous droplet emulsion with a controllable particle size and a wide diameter distribution is prepared rapidly. The method is simple in operation, and is economic and practical. The method avoids problems of oversized particle size ranges, large equipment sizes, high cost and difficult operation in traditional preparation processes of dispersive droplet emulsions.

The invention discloses a method for measuring ion strength of a substance. The method comprises the following steps of: preparing the solution of a substance to be detected into micro-dispersion liquid drop emulsion by a liquid-liquid micro-dispersion method; sending the micro-dispersion liquid drop emulsion into an electric field to measure the electrophoretic mobility; and obtaining the ion strength of the micro-dispersion liquid drop emulsion according to the value of the electrophoretic mobility. The method is accurate, economical and effective in measuring the ion strength of solution. The measuring method is simple in operation, economical and practical, and the defect of range limitation during the traditional measuring process of ion strength is avoided. The method is applicable to solution with different viscosity systems, and is widely applied to the measurement of ion strength of solution in the oil and chemical industry.

The present invention relates to a preparation method for lactide modified polyether polyol. In order to solve the technical problem of long polymerization time in a preparation process of a lactide modified polyether polyol, the preparation method for the lactide modified polyalcohol comprises: enabling oxyalkylene and lactide to carry out ring-opening copolymerization by taking a double-metal cyanide complex as a catalyst and taking a compound containing an active hydrogen atom as an initiator, wherein the double-metal cyanide complex catalyst comprises the following components in parts by weight: a) 40-99.8 parts of a double-metal cyanide mixture; and b) 0.1-30 parts of C4-C10 tertiary alcohol. The technical scheme solves the technical problem well, and can be used for industrial production of the lactide modified polyether polyol.

The present invention relates to a catalyst for ring-opening copolymerization of oxyalkylene and lactide, and mainly solves the problems of low activity and long copolymerization time of a catalyst for ring-opening copolymerization of oxyalkylene and lactide. According to the technical scheme, the catalyst for ring-opening copolymerization of oxyalkylene and lactide comprises the following components in parts by weight: a) 40-99.8 parts of double metal cyanide as shown in formula (I); b) 0.1-30 parts of n-silicate ester as shown formula (II); and c)0.1-30 parts of tertiary alcohol, the technical problem is solved well, and the catalyst can be used in ring-opening copolymerization of oxyalkylene and lactide.

A filter device purifies fluids, especially fuels contaminated with organic substances. Hydroxyl radicals are formed from water molecules contained in the fluids by a separating device (10, 14, 22). The hydroxyl radicals oxidize the impurities, especially organic substances, as much as possible and convert them into compounds such as CO₂.

The present invention provides of a system for generating electricity from air hydropower. The system is having a pump from a reservoir. Also, at least one vessel for receiving pumped water therein, the at least one vessel having a pressure plate being buoyant over the water and pressurized pneumatically from other side to increase pressure over the water. The pressurized water is automised and released over the turbine for generating electricity. The system has an advantage of having less construction and maintenance cost by using very small area. Further, the system has an advantage of being converted from thermal power to air hydro power plant.

The invention relates to a roll (1) for processing nonwoven, textile, plastic or paper material webs, comprising a roll carrier (10) and a roll shell (20), which can rotate around the roller carrier (10), the roll shell (20) having an outer peripheral surface (26) forming the working roll periphery (25) and an inner peripheral surface (27). According to the invention, the roll shell (20) is designed as a homogeneous, self-supporting shell body (21) comprising a thermosetting plastic (22) and having a hardness of 85 to 95 [degree]ShD and a modulus of elasticity in the longitudinal extent of the shell body (21) of at least 2000 and at most 8000 MPa at room temperature and of at least 1000 and at most 6000 MPa at a temperature of 70 DEG C, preferably 120 DEG C.