40results about How to "Achieve pre-separation" patented technology

The invention belongs to the technical field of agricultural mechanized transplantation, and particularly relates to a seedling sending, taking and delivering device for a pressing type seedling taking full-automatic seed tray seedling transplanter. The device comprises a rack, a seedling sending mechanism and a seedling taking and delivering mechanism; the seedling sending mechanism comprises a lead screw driving motor, a chain driving motor, a sliding rail, a side plate, a chain, a front bottom plate, a driven shaft, a driving shaft, a rear sliding rail support, a sliding rail sliding block,a rear bottom plate, a first connecting beam, a ball lead screw, a lead screw sliding block, a second connecting beam, a third connecting beam and a front sliding rail support; the seedling taking and delivering mechanism comprises a seedling taking plate, a cylinder mounting plate, a seedling pressing rod, a seedling pressing cylinder and a seedling guide tube. Accordingly, pot seedlings are taken out from the lower portion of a seedling tray, seedling delivering is conducted directly, and the seedling taking process and the seedling delivering process are combined into a whole, and the efficiency is higher.

The invention discloses a method of ore dressing and pre-desilication of alumyte, comprising the following steps: a. the alumyte is treated by milling grinding, and is added with dispersant in the process of milling grinding; b. flocculating agent is added into the ground product of the alumyte obtained in the step a, and then the mixture is settled; c. the dispersant is added into the settlement product obtained in the step b, and settlement product (coarse) concentrated ore is obtained by stirring, scouring and settling separation. The process flow of the method is simple, can improve the separating efficiency of aluminium silicon, and can effectively realize the pre-desilication of alumyte; the obtained products can be directly taken as the raw material of alumina technique, or as the raw material of the next stage of ore dressing and desilication technique, so that the utilization rate of low-grade alumyte resources can be further improved.

The invention provides a point discharge micro-plasma atomic emission spectrum analysis device in argon-hydrogen flame, sample steam containing elements to be detected and a shielding gas respectivelyenter an atomic emission spectrum excitation source (point discharge micro-plasma in the argon-hydrogen flame), and generated atomic emission spectrum signals are detected by a spectrum detector. Theexcitation source is composed of a point discharge part and an argon-hydrogen flame part which are coaxially arranged in series up and down, the point discharge part is a pair of tip electrodes whichare symmetrically arranged on the two sides of a ceramic fixing base, and a spectrum detection window is formed in the side face of the point discharge part; according to the argon-hydrogen flame part, an outer quartz tube is fixed to a base circle, the outer quartz tube and an inner quartz tube are coaxially arranged, the upper portion of the inner quartz tube is large, the lower portion of theinner quartz tube is small, the lower section of the inner quartz tube is located in a base center hole, a bottom opening serves as an inlet of a working carrier gas and the sample steam, and an inletof the shielding gas is formed in the outer quartz tube. The point discharge micro-plasma atomic emission spectrum analysis device has the characteristics of high atomization/excitation efficiency, high sensitivity, strong anti-interference capability (small interference between sample moisture and a matrix), good stability, low power consumption and the like.

The invention relates to the technical field of beneficiation, and provides a pre-separation and waste-discarding beneficiation method for low-grade copper sulphide ores. According to the method, low-grade copper sulfide ores are screened into -60+10 mm, -10+6 mm, -6+2 mm, -2+0.15 mm and -0.15 mm ores through crushing and repeated screening, the -0.15 mm ores are regarded as primary slime and aredirectly used as qualified ores, the -2+0.15 mm, -6+2 mm and -10+6 mm ores are subjected to pre-separation and waste discarding through jigging, and the -60+10 mm ores are subjected to pre-separationand waste discarding through intelligent ray ore separation, and the copper grade of the finally obtained qualified ores is 0.27% or above. According to the provided method, pre-separation of the copper sulphide ore and a large amount of barren rock is realized, the copper grade of the selected ores is improved, the amount of ores entering a concentrating mill for grinding and separation is reduced, operation is stable, the cost is low and industrial production is realized easy.

The invention discloses a particulate matter online dilution sampling measurement system and method. A PM10 cyclone cutter, a PM2.5 cyclone cutter, a sampling gas-flow flowmeter, a primary diluter, asecondary diluter, a charge particle measurement device, a particulate matter filter, a flue gas flowmeter, a flue gas flow control valve and a sampling pump are orderly connected; compressed air provided by an air compressor is divided into three paths after entering a compressed air buffer and processing device: a dry and clean gas-flow path, a primary diluting gas-flow path and a secondary diluting gas-flow path; the drying cleaning gas-flow path leads to an inlet end of the dry and clean gas-flow ionization device, the primary diluting gas-flow path leads to a primary diluting gas-flow inlet of the primary diluter, and the secondary diluting gas-flow path leads to a secondary diluting gas-flow inlet of the primary diluter. The particulate matter online dilution sampling measurement system has obvious advantages that the particulate matter sampling measurement feedback is timely, the cooling and the diluting are enough, the pipeline clogging is avoided, the measurement result is accurate, and the system is long in stable running time.

The invention relates to an ultra-low wall loss submicron terminal virtual impactor. The impactor comprises an inflow inlet, positioning double-screw bolts, a lateral flow cavity, an accelerating nozzle, a small-particle-size particle collecting cavity and a large-particle-size particle collecting cavity; the inner flow inlet is fixedly connected with the top wall of the lateral flow cavity through the positioning double-screw bolts; the bottom wall of the lateral flow cavity is fixedly connected with the acceleration nozzle; the upper end of the acceleration nozzle is located inside the lateral flow cavity; the lower end of the acceleration nozzle is fixedly connected with the upper end of the small-particle-size particle collecting cavity; the lower end of the small-particle-size particle collecting cavity is fixedly connected with the large-particle-size particle collecting cavity; and the upper part of the large-particle-size particle collecting cavity is located in the small-particle-size particle collecting cavity. The ultra-low wall loss submicron terminal virtual impactor of the invention can be adopted as a terminal device so as to be directly exposed to a sample environment, and can separate aerosol particles at the beginning of collection; a transverse-ring-shaped sample collection inlet design for submicron particles is realized, so that the pre-separation of the particles is realized, and separation precision can be improved; and pure gas flow is added, so that direct contact of the aerosol particles with an inner wall surface can be avoided, so that the wall surface loss of the particles is extremely low.

The invention discloses a catalytic gasoline deep hydrodesulfurization method. The method comprises: adjusting the operating conditions of a catalytic device fractionating tower, adding a lateral line, adopting an appropriate cutting point to conduct cutting so as to obtain FCC (fluid catalytic cracking) gasoline light fractions at the tower top and FCC heavy fractions at the lateral line; subjecting FCC gasoline light fractions to alkali-free deodorization, and then separating light gasoline and medium gasoline through a hydrogenation prefractionator; and carrying out moderate selective hydrogenation on the medium gasoline, performing deep selective hydrogenation on the heavy gasoline, and mixing the obtained two parts of refined distillate oil with the light gasoline subjected to alkali-free deodorization, thus obtaining a clean gasoline product or a blending component. Compared with the existing catalytic gasoline hydrodesulfurization technologies, the method provided in the invention can significantly reduce equipment energy consumption, the gasoline octane number loss is small, the obtained gasoline product quality can meet the quality requirement for a sulfur content of less than 10 micrograms/g, and the economic benefits of oil refining enterprises are improved.

The invention relates to a dilution sampling device for flue gas under the high-humidity condition and a sampling method of the dilution sampling device. A PM10 whirlwind cutter, a first-level PM2.5 whirlwind cutter, a flue gas insulation and dehumidification device, a sampling airflow flowmeter, a first-level diluter, a second-level diluter, a second-level PM2.5 whirlwind cutter, a particulate filter, a flue gas mixing device, a flue gas flowmeter, a flue gas flow control valve and a sampling pump are connected in sequence, compressed air produced by an air compressor is divided into three paths through a compressed air buffering and processing device, one path is connected with the flue gas mixing device through a drying air flow control valve, a drying airflow flowmeter and the flue gasinsulation and dehumidification device, one path is connected with the first-level diluter through a first-level dilution airflow control valve and a first-level dilution airflow flowmeter, and one path is connected with the second-level diluter through a second-level dilution airflow control valve, a second-level dilution airflow flowmeter, the first-level diluter, and a second-level dilution airflow pressure gage. According to the dilution sampling device for the flue gas under the high-humidity condition, flue gas capturable particulate matters and condensable particulate matters under thehigh-humidity condition are sampled.

The invention discloses a coal milling method adopting a medium speed coal mill as well as the coal mill. The coal mill comprises a coal falling pipe (2) and a mill body (1), wherein the mill body (1) is provided with a coal falling port (6), a coal outlet (8) and an air inlet channel (4), a pre-drying device is added to the coal falling port (6) in the front end of the mill body (1) for pre-drying coal entering the coal mill, so that the drying capacity and the working condition of the mill body (1) are improved, further, the drying capacity of the coal mill is improved, the unit consumption of the coal mill is reduced, and wear of a mill roller is reduced.

The invention relates to a shunting guide type inertia cyclone separator which comprises a coalescence shunting type inlet and a barrel body; the coalescence shunting type inlet comprises a tangential inlet, a coalescence pipe, a flow guide body, a conversion pipe and a shunting guide pipe; and the barrel body is formed by sequentially connecting a rotational flow section, a conical section and an underflow section which have the same central axis from top to bottom, an inner cone is connected to the axis of the top of the barrel body, and an overflow pipe is arranged at the center of the underflow section. A continuous phase, a large-particle-size dispersed phase and a small-particle-size dispersed phase can be shunted and layered under the action of inertia through the shunting guide type inlet, three different fluids are guided to different positions in the cyclone through an inner-layer guide plate and an outer-layer guide plate, and the dispersed phases with different particle sizes are finely separated. The cyclone can realize higher separation efficiency on dispersed phases with large and small particle sizes, and has the outstanding advantages of small equipment volume, realization of targeted shunting and guiding effects on liquid drops with different sizes so as to finish efficient separation and the like.

The invention discloses an enrichment and pre-separation system for VOCs in atmosphere. The system comprises a sampling device, a water removal device, an enrichment and pre-separation device and a sampling device. The enrichment and pre-separation device comprises a second cold trap, a third cold trap, a fourth cold trap, a second gas flow controller and a third gas flow controller. According tothe enrichment and pre-separation system for VOCs in the atmosphere, VOCs in sample gas can be synchronously adsorbed, concentrated and preliminarily separated, and the adsorption efficiency is high.VOCs subjected to preliminary adsorption and separation are respectively classified and captured through different desorption and capture channels, so that pre-separation of various VOCs is realized.Self-cleaning of the equipment can be achieved, operation is easy, and no extra auxiliary device is needed.