67results about How to "Adjust the amount added" patented technology

The invention discloses a preparation method for carbonic nanotube viscoelastic fluid, which uniformly disperses carbonic nanotubes in a viscoelastic vermiculate micellar system formed by an anion / cation surface active agent under the dispersive function of a polymer to the carbonic nanotube and with the help of ultrasound and the like external forces. The carbonic nanotubes of the carbonic nanotube viscoelastic fluid prepared by the method can achieve favorable dispersion, and the mixed system has considerable viscoelasticity. The dispersion degree of the carbonic nanotubes and the viscoelasticity of the mixed system can be conveniently adjusted by changing the varieties, the mixing proportion and the total concentration of the surface active agent, the addition amount of the polymer and the like, thus meeting the requirements of practical application on various occasions.

The invention discloses a zirconia, hydroxyapatite and magnesium phosphate laminar composite and belongs to the field of medical laminar composites. A method for preparing the laminar composite is characterized in that a zirconia and hydroxyapatite two-component slurry layer and a zirconia, hydroxyapatite and magnesium phosphate three-component slurry layer are coated outside a zirconia ceramic surface layer with stable yttria through a physical coating method in sequence. The flexure strength and the breaking tenacity of the laminar composite are enhanced through adjusting the addition of zirconia of an inner layer, and the bone-growth inducibility of the laminar composite is improved through regulating the addition of hydroxyapatite and magnesium phosphate of an outer layer. The prepared multilayer ceramic composite is superior to a traditional bone repair material in flexure strength and breaking tenacity. Moreover, the multilayer ceramic composite is higher in biocompatibility and inducing osteogenesis capability and can be used for repairing bone defects of parts, such as shanks, thigh joints and the like.

The invention provides a biodegradable modified urea resin adhesive and application thereof. The biodegradable modified urea resin adhesive is prepared by mixing a segmented copolymer with protein hydrolysate at a mass ratio of 1:(0.1-0.5), and can be used as an adhesive for preparing a biodegradable product. A degradable modified urea resin is prepared by using a copolymerizing and blending combined method; the degradation period of the adhesive is adjusted and controlled by controlling the addition amount and hydrolysis of the protein hydrolysate in the blending process; furthermore, a seedling culturing container prepared from the adhesive is capable of providing nutritive elements, such as nitrogen, phosphorus and potassium, in the seedling growing process, so that growth of seedlings is promoted.

The invention discloses a rust-resistant hot rolled ribbed bar and a production process thereof. The chemical components of the ribbed bar comprise C, Si, Mn, V, Cr, P and S, wherein the percentages by weight of the chemical components are as follows: 0.20-0.25% of C, 0.40-0.60% of Si, 0.90-1.10% of Mn, 0.010-0.020% of V, 0.15-0.25% of Cr, not larger than 0.042% of P, not larger than 0.040% of S and the balance of iron and unavoidable impurities. The production process mainly comprises the following steps: (1) preparation of blast furnace molten iron; (2) top-blown converter smelting; (3) LF furnace molten steel refining; (4) continuous casting; (5) rolling steel production; (6) cooling treatment. The rust-resistant hot rolled ribbed bar disclosed by the invention has the advantages that the chemical components of the ribbed bar are optimized, the addition amount of alloy elements is adjusted, the alloy cost is greatly reduced, the rolled cooling strength is reduced, the mechanical properties of the bar are guaranteed, damage of the strong water penetration cooling process on iron oxide coating on the surface of the ribbed bar after rolling is avoided as well, and the rust resistance of the ribbed bar is guaranteed.

The present invention relates to a method to measure molybdenum content in molybdenum concentrate with a differential spectrophotometry method belonging to the field of analytical chemistry, which adopts the differential spectrophotometry method to measure a series of concentrations of standard solutions to obtain a slope K and an intercept b of a standard curve. In addition, 10ug / ml molybdenum solution is provided for the test as reference solution. Absorbency of the solution to be tested is measured with the differential spectrophotometry method. The slope K and the intercept b of the standard curve are input. An instrument automatically calculates molybdenum content in the tested solution according to the absorbency. The method removes hard operation due to excessive steps of gravimetric method to measure molybdenum content, greatly reduces assay period, saves reagents, water and electricity and decreases assay cost.

The invention discloses a soil improving method of sludge compost. The method includes: mixing a heavy metal passivator with sludge compost to prepare a compost mixture; air-drying the mixture; addingdesulfurized gypsum powder, original soil and charcoal into the air-dried mixture to obtain an improved soil finished product. By adding the heavy metal passivator, the desulfurized gypsum powder andthe charcoal, content of active-state heavy metal is lowered obviously, pH value of soil is lowered, water-holding capacity of the soil is improved, and germination index of the soil when used for plant culture is increased. The method is suitable for saline-alkaline land improvement, sandy soil improvement and mine restoration.

The invention discloses a preparation method of a negative-ion master batch, which comprises the following steps of: putting a negative-ion auxiliary agent and a surface treatment agent into a high-speed stirrer and stirring until the surface treatment agent is molten; putting the stirred raw materials into a low-speed stirrer and stirring when cooling until the raw materials are cooled to room temperature so as to obtain a cooled material; carrying out ball milling on the cooled material and pulverizing so as to obtain a modified negative-ion auxiliary agent; mixing 20 to 80 parts of modified negative-ion auxiliary agent, 20 to 80 parts of organic carrier, an antioxidant and a lubricant evenly; and extruding the raw materials, cooling, pelleting and drying so as to obtain the negative-ion master batch. The negative-ion master batch prepared by the method has good compatibility with resin, can be mixed with various kinds of resin and then can be prepared into a plastic product by a conventional method. The additive amount of the master batch can be regulated according to the concrete application occasion of the plastic product so as to regulate the release concentration of negative ions, the application range is wide, and the application mode is flexible.

The invention provides a preparation method of aroma-increasing buffalo yogurt and belongs to the technical field of food processing. According to the preparation method, raw buffalo milk serves as raw milk and is subjected to part skimming treatment so that partly skimmed milk can be obtained, then a specially developed buffalo milk fat natural aroma-increasing base material is added, a proper quantity of strains are added for fermentation after homogenizing, sterilization and cooling are carried out, and thus the aroma-increasing buffalo yogurt is obtained. In the operation process of the preparation method, the buffalo milk fat natural aroma-increasing base material is prepared by using the raw buffalo milk or single cream obtained through skimming or part skimming of the raw buffalo milk as an enzymolysis substrate and carrying out enzymolysis with flavor proteinase and fat proteinase in sequence. The obtained aroma-increasing base material is stable in quality and rich in flavor and is added for preparation of yogurt, so that comprehensive utilization of by-product fat is achieved. Meanwhile, the base material has abundant small molecular peptide, amino acid and fatty acid, pH is lower than that of the raw milk, buffalo milk fermentation and yogurt coagulation can be promoted, the prepared buffalo yogurt product is rich in lactoprotein-derived flavor and milk fat-derived flavor, and the fat content is low.

A method for solidifying and the solidifying agent can not noly hoist working performance of solidifying working but also offer materials of kinds of solidifying standard to attain proper solidifying intensity, and its character is: to the admixture of the materials of solidifying standard and calcium group, successively or simultaneously appending solution A which based on admixture of lignin group and sodium silicate and solution B which based on admixture of lignin group and calcii chloridum, solidifying the said materials of solidifying standard by mixing and agitation.

The invention relates to an in-situ synthesis method of a nano oxide catalyst coated hydrogen storage alloy composite. In the nano oxide catalyst coated hydrogen storage alloy composite, an Lal-x-yRExMgyNi3.0-a-bM1aM2b hydrogen storage alloy is selected in the hydrogen storage alloy, rare earth oxide and / or transition metal oxide are / is selected in the nano oxide catalyst, x, y, a and b are atomicratios, x is larger than 0 and smaller than 0.2, y is larger than 0 and smaller than 0.6, and a+b are smaller than 1. According to the raw material composition and the preparing method, the catalystsynthesis and the coating process are carried out at the same time, the catalyst is evenly and stably coated on the alloy surface in a nano thin layer manner, at the same time, the catalyst precursorenvironment can carry out surface treatment on the alloy, the circular stability and dynamics properties of the hydrogen storage composite are obviously improved, and the high-capacity battery needs are met.

The invention discloses a biological reactor compound bacterium ectopic soil remediation system based on solar strengthening. The soil remediation system comprises a microbial fermentation tank, a nutrient storage tank, a valve, a vacuum pump, a converter, a controller, a solar panel, a heat transfer pipeline, an electrical control panel, a drug injection pipe, a pressure gauge, a suction pipe, anactivated carbon adsorption device and a biological reactor; the microbial fermentation tank is connected to the nutrient storage tank through the drug injection pipe and the pressure gauge, and thesolar panel is connected to the biological reactor through the controller, the converter and the heat transfer pipeline; and an air outlet of the biological reactor is connected to the activated carbon adsorption device through the suction pipe. According to the soil remediation system, through combination of vapor phase extraction and bioremediation technology, volatile organic compounds in soilcan be removed through the vapor phase extraction; organic matters in the soil can be degraded by compound bacteria, and heavy metals in the soil are fixed; and the purpose of remedying the heavy metals and the organic matters in the soil is achieved, and the remediation efficiency of multi-metal contaminated soil is improved.

The invention belongs to the technical field of food processing and specifically relates to an oven with a fan cleaning function. The oven comprises an oven main body, a roasting cavity, a fan, a heating tube and a cleaning device, wherein the oven main body is used for providing an installation space, the roasting cavity is arranged in the oven main body and is used for providing a roasting space, the fan is arranged on a rear lateral wall of the roasting cavity and is used for providing circulation air, the heating tube is arranged on the outer side of the fan and is used for providing heating, and the cleaning device is arranged in the oven main body, is connected with the fan and is used for cleaning the fan. According to the oven disclosed by the invention, when the fan is cleaned, the cleaning device is used for spraying water to clean the fan; thus, convenience in operation is achieved; high-temperature heating is avoided in a cleaning process, and energy consumption can be effectively saved; the oven has the characteristics of convenience in operation and low energy consumption.

The invention discloses a preparation method of a hydrophobic silica nano sphere-supported palladium-based catalyst. The method comprises the following steps of (1) preparing silica nano spheres with a hydrophobic group and a reduction group; and (2) reacting the silica nano spheres with palladium salt to obtain the hydrophobic silica nano sphere-supported palladium-based catalyst. According to the preparation method, a reducing agent is fixed on the surface of a carrier through an Si-C bond, Pd ions in the solution can only be reduced into Pd atoms on the surface of the carrier, the generated Pd atoms are easily gathered on the surface of the carrier to form supported nano palladium particles due to relatively high surface energy, the problem that a common chemical reduction method cannot be easily carried out on the hydrophobic surface of the carrier is overcome, the preparation process is not a high-temperature process generally adopted for hydrogen reduction, an organic group on the surface of the carrier can be well reserved. Compared with a post-grafting method in the prior art, the method disclosed by the invention has the advantage that the adding amount of the organic group can be conveniently adjusted to effectively control the hydrophobic property of the surface of the catalyst.

The invention discloses a spiral scraping dosing mixing catalytic oxidizer and a sludge utilization method, and belongs to the field of environment. A feed liquid inlet is formed in one end of a spiral scraping dosing mixing catalytic oxidizer shell, and a variable-pressure discharge port is formed in the other end of the spiral scraping dosing mixing catalytic oxidizer shell; a driving motor coaxially connected with a spiral scraping and pushing mixing knife is arranged at the feed liquid inlet end and used for driving the spiral scraping and pushing mixing knife to conduct rotary cutting, one end of a semi-sacrificial catalytic oxidation doser is inserted into the spiral scraping and dosing mixing catalytic oxidizer shell, and a catalyst is generated through in-situ cutting while liquidmedicine is provided. The sludge utilization method comprises the following steps: carrying out gradient structure reaction on a medicament added by a semi-sacrificial catalytic oxidation doser and sludge, carrying out catalytic oxidation on the sludge by generating a catalyst in real time, treating the sludge, carrying out catalytic oxidation decomposition on components with high nitrogen and sulfur contents in the sludge to prepare a fertilizer, carrying out solid-phase carbonization in the sludge, and combining with the catalyst. Therefore, a novel composite catalyst is obtained, and the comprehensive utilization of sludge is realized.

The invention discloses a normal and low temperature suspension reactor for resin processing, the reactor comprises a base, a reaction box is installed on the base, a driving motor is installed at the upper end of the reaction box, the output end of the driving motor is fixedly connected with a rotating rod, a stirring mechanism connected with the rotating rod is installed on the reaction box, and a material box is installed on the base. A material supply mechanism is installed at the upper end of the material box, a feeding pipe is installed at the upper end of one side of the reaction box, a discharging pipe is installed at the lower end of one side of the reaction box, a valve is installed on the discharging pipe, the stirring mechanism comprises a rotating shaft penetrating through the side wall of the upper end of the reaction box, and a plurality of spiral stirrers are fixedly connected to the outer wall of the rotating shaft. With arrangement of the driving motor, the material stirring can be achieved, the mixed material can be intermittently injected into the reaction box, and the addition is almost quantitative each time so as to achieve the good mixing reaction, no manual addition is needed, the manpower resource is saved, and the safety is provided.

The invention discloses an aluminum alloy welding wire suitable for arc fuse additive manufacturing. The aluminum alloy welding wire is composed of an outer aluminum strip and inner flux-cored powder,and the flux-cored powder comprises following components in percentage by mass: 1.0-3.0% of Mg powder, 1.0-5.0% of Ge powder, 5.0-20.0% of ceramic particles, and the balance of Al powder. The room-temperature strength and the high-temperature strength of an original Al-Si substrate are improved by adding germanium (Ge), the thermal fatigue resistance of an additive manufacturing structure under the effect of multi-layer and multi-pass welding is improved, the ceramic particles with good lattice matching degree with an aluminum substrate are added to serve as a heterogeneous nucleating agent,grains are refined, the additive manufacturing structure and the performance regulation and control are realized, the anisotropism of the additive manufacturing structure and performance is improved,the ceramic particles can be used as a strengthening phase along with the increase of the adding amount of the ceramic particles, and the mechanical property of an additive manufacturing part is further improved.

The invention discloses a lightweight fresh-keeping and anticorrosive composite packaging material for vegetables and fruits. The lightweight fresh-keeping and anticorrosive composite packaging material is prepared from the following raw materials in parts by weight: 50-100 parts of matrix resin, 3-8 parts of neopentyl glycol diglycidyl ether, 5-10 parts of hydroxy propyl distarch phosphate, 2-6 parts of polyvinyl pyrrolidone, 1-5 parts of sodium polyacrylate, 1-3 parts of calcium carbonate, 1-3 parts of resorcinol bis(diphenyl phosphate), 5-10 parts of hydroxy propyl distarch phosphate, 1-3 parts of hydroxyl silicone oil, 0-58 parts of modified filler, 0.5-2 parts of a light stabilizer, 0.5-1.5 parts of an antioxidant and 0.2-0.8 part of fungicide, wherein the matrix resin is resin of ethylene-1-octylene copolymer, polyvinyl butyral and molybdenum-modifying phenol-formaldehyde, and the ratio in parts by weight is (2-4):(1-2):1. The lightweight fresh-keeping and anticorrosive composite packaging material for vegetables and fruits is a vegetable and fruit packaging product raw material which has the characteristics of being light in weight, fresh-keeping, anticorrosive, free of pollution, free of peculiar smell, free of toxic chemical substance and smooth in surface.

The invention relates to a decolorization device for wastewater by metal surface coloration permeation flaw detection. A water treatment vessel is communicated with a water inlet pipe and a water outlet pipe. The water treatment vessel is also connected with a decolorizer synthesis vessel and a dosing device which are further connected with a feeding device. A parameter measurement instrument is arranged on the water outlet pipe. The decolorization device for the wastewater by the metal surface coloration permeation flaw detection can integrate the synthesis of decolorizer, the addition of auxiliary medicines, and a raw liquor treatment device into a whole. The decolorization device is capable of carrying out continuous decolorization treatment; simultaneously, after an automatic control device is added, the treatment process can be controlled by a computer, thereby bringing about more convenient use and higher efficiency.

The invention discloses a culture method of river crab megalops larvae and relates to the technical field of crab breeding. The culture method comprises the following steps: constructing a nursery pond, planting aquatic plants, breeding parent fries outside cages, feeding baits, carrying out water quality management and carrying out greenhouse management. By adopting the method disclosed by the invention, the survival rate of the river crab megalops larvae can be improved; the megalops larvae have the advantages of rapid development, large size, high yield, low sexual precocity rate and easiness for management; and after the megalops larvae are cultured into phase-V juvenile crabs, the phase-V juvenile crabs can be transferred into a juvenile crab culture phase by ponds to be cultured, andthe culture method has very good culture popularization value.

The invention relates to a flow valve. The flow valve is used on a jet flow mixer of a venturi structure, a liquid suction nozzle and an air suction nozzle which protrude outside and are connected with the interior of the jet flow mixer are arranged on the narrow portion of the jet flow mixer, and the flow valve is connected with the jet flow mixer through the liquid suction nozzle and the air suction nozzle; the negative pressure is generated in the narrow portion of the jet flow mixer by the water flow, an air pressure bag in the flow valve is inhaled to lift a needle valve by using the generated negative pressure, a washing agent passage from a washing agent container to the jet flow mixer is built, washing agents in the washing agent container are inhaled to enter the jet flow mixer and mixed with water by using the negative pressure, the flow of the washing agents is matched with the water flow, the water flow is greater, the generated negative pressure is larger, the inhaled washing agents are more, and the water and the washing agents are mixed into laundry detergent with a uniform concentration simultaneously; the position of an adjustable ring on an adjusting seat is adjusted by screwing the adjustable ring, and accordingly the effect of adjusting the addictive amount of the washing agents under the same negative pressure is achieved.

The invention relates to chilli sauce processing, in particular to a chilli sauce processing system and a chilli sauce processing method. The chilli sauce processing system comprises a device support,a stirring support, a stirring mechanism I, a stirring mechanism II, a feeding mechanism, a pulling mechanism, control modules and a stirring motor II, the stirring motor I and the stirring motor IIrespectively drive a spiral base plate II and a spiral base plate I to rotate so as to stir materials in a stirring barrel; meanwhile, a telescopic mechanism is started, and the telescopic mechanism adjusts the relative height between the spiral base plate II and the spiral base plate I; a pulling motor is started to drive a clamping frame and a clamping plate to move forwards, and the clamping frame and the clamping plate pull a plurality of control modules to move forwards; the multiple control modules move forwards to push the corresponding feeding mechanisms to be opened or closed, the corresponding raw material is added into the stirring barrel, different processing raw material can be added during processing by adjusting the number and positions of multiple push plates according to different use requirements, and the adding time and the adding amount of each raw material are controlled.

The invention provides sewage treatment equipment with an automatic dosing function, which comprises a filter combination, the filter combination comprises a filter tank and a conical barrel, one side of the conical barrel is provided with an automatic dosing assembly, the automatic dosing assembly comprises an inlet pipe and a medicine box, the inner side of the filter tank is provided with a slag discharge system, and the inner side of the conical barrel is provided with a water outlet pipe. The sewage treatment equipment comprises a filter tank, a disinfection system is mounted at the bottom of the filter tank, dredging systems are distributed on the inner side and the outer side of the filter tank, and a solid-liquid separation system is welded to one side of the filter tank. The sewage treatment work does not need to be stopped, sludge drying and sewage discharging work does not need to be carried out, the working efficiency of the equipment is improved, input of high-pressure gas can be automatically stopped, the dredging time is shortened, the high-pressure gas and consumption are reduced, the adding amount of chemicals can be automatically adjusted according to the flow of sewage, and the device is suitable for sewage purification and filtration treatment.

The invention provides a preparation method of aroma-improved defatted buffalo milk, and belongs to the technical field of food processing. The preparation method comprises the following steps: performing defatting treatment on raw buffalo milk serving as raw milk to obtain defatted milk, adding a specially developed natural buffalo milk fat aroma-improving base material, and performing homogenization treatment, pasteurization, cooling, canning, sealing, boxing and cold storage at 1 to 4 DEG C to obtain the aroma-improved defatted buffalo milk which is checked to be qualified. According to the preparation method, operation procedures are simple, wherein the buffalo milk fat aroma-improving base material is prepared by sequentially performing enzymolysis through flavourzyme and fatty proteinase by adopting the raw buffalo milk or watery cream obtained by defatting the raw buffalo milk as an enzymolysis substrate; the obtained aroma-improving base material is stable in quality, strong in flavor and rich in small molecule peptide, amino acid and fatty acid, and can be applied and added for preparation of the defatted buffalo milk to realize comprehensive utilization of a byproduct fat, and the defatted buffalo milk is rich in milk protein and low in fat content, and has a milk fat source flavor.

The invention discloses a high-porosity plastic light profile and a manufacturing method of the high-porosity plastic light profile. The high-porosity plastic light profile comprises a profile intermediate core part of a meshy three-dimensional hole structure, and a solid skin is arranged on the outer surface of the profile intermediate core part. The manufacturing method comprises the following steps: step one, preparing raw materials, and respectively acquiring skin material powder and core part material particle fragments; step two, adding the core part material particle fragments into a mold cavity, keeping the core part material particle fragments to be at a loose state, closing a mold, heating, naturally fusing, plasticizing and connecting the core part material particle fragments to form the meshy three-dimensional hole structure under the effect of a formation auxiliary agent; and step three, forming the solid skin. The core part material particle fragments are not pressed in the mold cavity, interval holes are reserved among the fragments, and the core part material particle fragments are naturally fused, plasticized and connected to form the meshy three-dimensional hole structure; compared with relatively conventional method products, the performance index of the formed product is greatly improved, and the solid skin of the profile is smooth, and the intensity of the profile is also improved.

The invention discloses a novel stirring and lifting device for pharmaceutical equipment. The device comprises a stirring barrel, wherein liquid storage tanks are symmetrically and fixedly connected to the upper end of the stirring barrel, and a liquid pumping device for pumping medicine liquid in the liquid storage tanks into the stirring barrel is mounted on the stirring barrel. According to thedevice, a sliding plug cylinder, a sliding plug, a telescopic rod, a disc and a second motor are arranged, so that the second motor rotates to enable the sliding plug to move back and forth in the sliding plug cylinder; the medicine liquid in the liquid storage tanks is pumped into an arc-shaped cavity, and sprayed through liquid outlets; manual addition of the liquid medicine, which causes too-long stirring time of medicine, and reduced stirring efficiency is prevented; the telescopic rod is adjusted to control the adding amount of the medicine liquid, the adding amount of different types ofthe medicine liquid can be conveniently adjusted, and the situation that the adding amount of the medicine liquid cannot be accurately judged due to the fact that the adding amount of the medicine liquid is manually controlled is avoided.

The invention discloses brewing equipment capable of facilitating taste adjustment. The brewing equipment capable of facilitating taste adjustment comprises a distillation tank, wherein a heating baseis arranged at the lower end of the distillation tank, a sealing cover is arranged at the upper end of the distillation tank, a reaction chamber with open upper and lower ends is arranged in the distillation tank, a carrier board is arranged at the lower end of the reaction chamber, air vents are formed in the carrier board in an array mode, heating pipes are arranged at the upper end of the carrier board at an interval, and heating devices are communicated with side walls of the reaction chamber, the carrier board and the heating pipes; outer walls of the heating pipes are sleeved with stirring screws, a motor is arranged at the upper end of the sealing cover, an output shaft of the motor is connected with a transmission shaft, and the transmission shaft and the stirring screws are in transmission connection; and the sealing cover is provided with an air outlet pipe and a feeding opening, and a sealing door used for sealing the feeding opening is hinged to an edge of the upper end ofthe feeding opening. The brewing equipment capable of facilitating taste adjustment is provided, so that the taste and the quality of distilled liquor with a fruit flavor can be improved, and meanwhile, the taste is easy to adjust.

A flow valve can be applied to a jet flow mixer in a Venturi structure. A narrow part of the jet flow mixer is provided with a liquid absorption nozzle and an air absorption nozzle both outwardly projected and communicated with the interior of the jet flow mixer; the flow valve is connected with the jet flow mixer via the liquid absorption nozzle and the air absorption nozzle; negative pressure is produced in the narrow part of the jet flow mixer when water flows; an air pressure bag in the flow valve can be absorbed by the produced negative pressure, so a needle valve can be lifted up; a laundry detergent channel is built from a laundry detergent container to the jet flow mixer; the laundry detergent in the laundry detergent container can be absorbed via the negative pressure to enter the jet flow mixer to be mixed with water; flow amount of the laundry detergent is matched with water flow amount; larger water flow can produces larger negative pressure and more laundry detergent can be absorbed; and water and the laundry detergent can be synchronously mixed to form washing liquid with even concentration.

The invention discloses a device and method for keeping the particle concentration stable in a proppant speed measurement experiment, wherein particles comprise tracer particles and proppant particles. The device comprises a settling tank, a first conveying pump, a first stirring tank, a second conveying pump, a second stirring tank and a third conveying pump which are connected in sequence, wherein the first stirring tank is used for preparing a liquid, the second stirring tank is used for mixing sand, the settling tank comprises a first tank body, a first liquid inlet, a first liquid outlet and a sand discharge port are formed in the first tank body, a filter screen and a liquid up-and-down limiting sensor are arranged in the first tank body, the interior of the first tank body is divided into an upper filtrate cavity and a lower sand setting cavity by the filter screen, the first liquid inlet is formed in the side wall of the lower sand setting cavity, the first liquid outlet is formed in the side wall of the upper filtrate cavity, the sand discharging port is formed in the bottom of the lower sand setting cavity, and the liquid up-down limiting sensor is arranged in the upper filtrate cavity. According to the invention, continuous mixing and circulating pumping of a sand-carrying fluid in a proppant conveying experiment process can be realized, and the stability of the concentration of tracer particles and the proppant used in a PIV test process can also be ensured.