34results about How to "Large particle size range" patented technology

The invention relates to a device and a method for determining parameters of a hydraulic engineering material and particularly relates to a device and a method for determining the permeability characteristic of coarse-grained soil with super large grain size (the d85 is larger than or equal to 60mm and smaller than or equal to100mm), and the IPC (International Patent Classification) codes of the device and the method are respectively E02D1/04 and E02D33/00. The device comprises a testing drum, an automatic compression system 11 and a pressure determining tube 12, wherein a plurality of pressure determining holes are formed in the wall of the testing drum, the pressure determining holes in the wall of the testing drum can be used as air discharge holes when air is discharged out of soil body from saturation, and the pressure determining holes and air discharge holes in the drum top and the drum bottom jointly accelerate air discharge, so that a sample can be saturated rapidly. Proven by a large number of experiments, the method has the advantages that hot water at the temperature of 25-40 DEG C is used, the sample with super large grain size cab be saturated rapidly and the influences on the chemical and physical stability of the sample are minimized.

The invention discloses a concentration measuring device and method for dust in large diameter range. Aiming at the shortcoming that scattering integration method in the prior art is not applicable when the particle size is smaller than 10 microns, the measuring device uses a multistep neutral density filter to attenuate transmission light and scattered light to a same light intensity level, realizes simultaneous shooting of transmission light and scattered light in a measurement system of a single digital area-array camera, and has the advantages of high sensitivity, fast response and simple and compact optical system. According to the obtained information of scattered light and transmission light, the distribution of particle size can be acquired; with the known particle size distribution, a method combined scattered light with scattering integration can be used to measure dust concentration of micron level, and a method combined transmission light with light extinction can be used to realize the measurement of dust concentration of submicron and nanometer levels. The invention successfully realizes the measurement of dust concentration of micron, submicron and nanometer levels, covers large particle size range, and has great market advantage.

The invention discloses a median type tailing damming method utilizing mold bags. The median type tailing damming method has the advantages that the grouted mold bags 7 are piled up to build a downstream dam body 2, the downstream dam body 2 is kept clean and smooth by the sand consolidation effect of the mold bags 7, and the environmental problems such as dust flying, gullying and coarse sand loss are solved well; tailing pulp with the content of tailing particles, smaller than 0.05mm in size, not larger than 40% (by weight) is taken as mold bag filling pulp for the mold bags 7, so that the particle size range of tailing sand available for damming is widened, sand quantity available for the median type tailing damming method is increased, water drainage of the mold bags 7 can be accelerated, solidification can be speeded up, and grouting efficiency of the mold bags 7 is improved; in addition, the action of gravity is fully utilized for grouting, and the mold bags 7 can be grouted by multiple branch ore drawing pipes 92 at the same time, so that cost and energy consumption are reduced, and damming efficiency is improved.

The invention discloses a sulfide highly-uniform microsphere with the precisely controllable particle size and a preparing method thereof. The method includes the primary core growth step and the secondary layer-layer growth step on the basis of the concept of the core-shell-shell structure. In the primary growth step, through stable reaction conditions, the sulfide nanosphere with the stable particle size is obtained; in the subsequent step, the adding moments and amounts of metal salt and a sulfur source are controlled, and then the particle size of the nanospheres can be precisely controlled. According to the synthesis method, the sulfide microsphere with the target particle size can be obtained by precisely designing test steps through the preset target particle size; meanwhile, by means of the method, the controllable particle size range is obviously increased, and the controllable range is 100-1000 nm.

The invention relates to an energy-saving low-carbon environment-friendly European-type grinding machine comprising an analytical machine on the upper part of a host machine, wherein the lower part of the host machine comprises an upper machine body, a middle machine body and a lower machine body; a discharge hole is formed in the top end of the upper part of the main machine; an airflow isolation loop is arranged on the lower part of the host machine; fine powder sending space is formed between the airflow isolation loop and the machine bodies of the lower part of the host machine; a feeding hole is installed in the outer side of the middle machine body; an air inlet is arranged in the lower machine body; a main shaft transmission device is installed in the middle machine body; the main shaft transmission device comprises a host machine belt wheel and a belt wheel transmission shaft; the host machine belt wheel is installed at the outside of the middle machine body; one end of the belt wheel transmission shaft is connected with the host machine belt wheel; the other end of the belt wheel transmission shaft is engaged with the other conical gear of the main shaft; a combined-type grinding roller lifting frame is installed on the main shaft; a cross arm shaft is installed on the combined-type grinding roller lifting frame; the upper end of a long-arm grinding roller shaft assembly is suspended on the cross arm shaft to form a movable fulcrum; a grinding roller capable of performing autogiration is installed at the lower end of the long-arm grinding roller shaft assembly; and a grinding ring with the position corresponding to that of the grinding roller is installed on the lower machine body. The energy-saving low-carbon environment-friendly European-type grinding machine is high in grinding efficiency, convenient to examine and repair and install, and long in service life, and a finished product produced by the energy-saving low-carbon environment-friendly European-type grinding machine is wide in particle size range.

An enrichment system for enrichment of a sample comprising one or more microscopic particles of interest in a fluid carrier is disclosed. The enrichment system comprises a flow cell configured to receive a portion of the sample, a plurality of sample holding chambers and a waste, each connected to a flow cell, an imaging sensor configured to obtain an image of the microscopic particles in the fluid carrier in the flow cell and a controller configured to direct passage of the portion of the fluid sample in the flow cell, in dependence on the image obtained by the imaging sensor, to one of the holding chambers or to the waste.

The invention discloses a coal mine dust-removing device based on ultrasonic atomization and condensation. The coal mine dust-removing device comprises a negative pressure pipeline composed of an airblower, a vacuum pump and a connecting pipeline. The negative pressure pipeline is provided with a cyclone separator, an ultrasonic atomizer, a pressure valve and a condensation chamber sequentially.The cyclone separator is connected with the air blower. The vacuum pump is further connected with a dust collector. The condensation chamber is internally provided with an ultrasonic oscillator. A sound absorption sponge is further arranged at an outlet of the condensation chamber. The coal mine dust-removing device is easy to implement and high in efficiency, the content of coal dust in air in acoal mine roadway is effectively decreased, vicious accidents such as coal dust explosion are avoided, and safe conducting of the coal mine roadway exploiting process is ensured.

The invention discloses highly uniform zinc oxide submicrospheres with controllable particle size and a preparation method thereof, which belong to the field of preparation of photonic crystal materials. According to the method, an alcohol-water system is adopted, so that the temperature and pressure required by synthesis of the zinc oxide microspheres are reduced, and the zinc oxide polycrystalline submicrospheres with good monodispersity are synthesized more cleanly. In the nucleation process, the temperature, the initial rotating speed, the zinc source and the deionized water amount are regulated and controlled, so that the nucleation process is rapidly carried out. In the growth process, mass transfer is further controlled by introducing polyhydric alcohol to control the viscosity of a system, and zinc oxide submicrospheres with stable particle sizes can be obtained through one-step reaction. According to the synthetic method, the zinc oxide submicrospherewith the specific target particle size can be obtained only by changing the amount of the zinc source and the variety and amount of the polyhydric alcohols. The adjustable particle size range of the zinc oxide submicrospheres prepared by the method is obviously enlarged, the adjustable range is 100-800 nm, and the monodispersity of the zinc oxide submicrospheres is good.

The invention provides a composite material containing an ordered microsphere array and a preparation method of the composite material, and belongs to the technical field of functional material preparation. On the basis of a silk-screen printing method, regular silk-screen meshes are filled with microspheres through a scraper blade, and the ordered microsphere array can be obtained after a silk screen is removed. According to the preparation method, regular arrangement of the microspheres is realized by utilizing meshes of the silk screen, the arrangement mode of the microspheres is controllable, the particle size range of the applicable microspheres is large, regular arrangement of larger microspheres can be realized, the operation is simple, the cost is low, the efficiency is high, and the preparation method is suitable for preparation of a large-area two-dimensional microsphere array and a large-volume three-dimensional microsphere array. In the composite material prepared by the method provided by the invention, the array formed by regularly arranging the microspheres can enhance the functionality of the material, and can be applied to the fields of electromagnetic shielding, radiation shielding, catalysis, light filtering and the like.

The invention discloses a digital ink jet dyeing machine. The digital ink jet dyeing machine comprises an unwinding and cloth feeding device, an ink jet device, a drying device and a winding device which are sequentially arranged in the fabric feeding direction, wherein the ink jet device comprises a machine body, a controller, an ink box, a cleaning liquid box, a waste liquid barrel and an ink jet module; the machine body is provided with at least two groups of ink jet modules, at least one ink box, at least one cleaning liquid box and at least one waste liquid barrel; each ink jet module comprises spray heads, a positioning frame and a supporting and moving mechanism; a plurality of spray heads arranged in parallel form spray head groups; and each ink jet module comprises at least one spray head group. According to the scheme, the fixed single-channel spray heads are adopted, and ink of a single color being subjected to color matching is evenly dotted on a textile so as to complete digital pure color printing, so that the most headache point-shaped granular feeling of a conventional digital printing machine is avoided, the color development effect is greatly improved compared with the color development effect of pure color printing of the printing machine, and the digital ink jet dyeing machine has the advantages of quick cleaning.

The invention provides a sewage precipitant and a use method thereof. The sewage precipitant comprises a flocculant, a coagulant aid, a conditioner, a demulsifier, a defoamer and a disinfectant, and is characterized in that the flocculant is a mixture of polyaluminum chloride and PVA, the coagulant aid is a mixture of activated carbon, bentonite and polyacrylamide, the conditioner is calcium oxideand ferric chloride, the demulsifier is T-1, the defoamer is a mixture of silicon dioxide powder and stearic acid, the disinfectant is ozone, and the mass ratio of the flocculant to the coagulant aidto the conditioner to the demulsifier to the defoamer is 2: 10: 0.5: 0.1: 0.1. The sewage precipitant is high in precipitation rate, capable of removing heavy metal ions, free of retention of a largeamount of Al<3+> and Fe<3+> after sewage treatment, capable of sterilizing and removing organic matters such as color, smell and the like in water, high in decomposition speed, free of residual substances and free of secondary pollution.

The invention provides an MCF fracturing temporary plugging agent and a preparation method and application thereof.The MCF fracturing temporary plugging agent comprises main components and additives, the main components comprise petroleum resin, ozocerite and calcium stearate, the additives comprise thermosetting resin, water-soluble resin and positive electricity gel, and the weight ratio of the additives to the main components is 1: (10-50). The MCF fracturing temporary plugging agent provided by the invention belongs to an oil-soluble resin temporary plugging agent, has the technical advantages of high compression strength, full degradation, adjustable particle size, safety, environmental protection, no danger, small dosage, low cost and the like, and has a wide application prospect.

The invention discloses an organic profile control agent. The organic profile control agent comprises 25-50 wt% of profile control agent solid particles, 0.2-0.5 wt% of a surfactant, 0.1-0.2 wt% of adispersing mutual solvent, 1-20 wt% of a water-soluble regulator, and the balance of water. The profile control agent solid particles are a reaction product obtained by heating 60-80 wt% of a naturalresin industrial product and 20-40 wt% of a polyol to 260 DEG C and performing a polymerization reaction for 10 h. The natural resin industrial product is one of rosin, Chinese lacquer, damar resin and shellac. The polyol is one of glycerol, pentaerythritol, diethylene glycol and trimethylolpropane. The organic profile control agent is a light yellow suspension system with a large particle size span, is insoluble in water and acids, and can quickly plug gun perforations and large cracks to effectively prevent a working fluid from entering the formation and selectively plug the target reservoir; and the organic profile control agent also has the advantages of simple preparation process, strong controllability, suitableness for large-scale production, and broad application prospects.