103results about How to "Promote disturbance" patented technology

The heat exchanger includes baffle gratings and heat exchange tubes mainly. Baffle grating is composed of baffle rings and curtain type slant mounted baffle pieces (SMBP) welded on grating. There is semicircular, quadrate, or gearwheel shaped openings on curtain type baffle piece, and there are bulges between two openings. Size of the opening is 0.25-0.5mm larger than outer diameter of heat exchange tube. Angle of tilt between curtain type baffle piece and baffle ring is 15-75 degrees. SMBP increases mean flow rate and turbulent motion degree of shell side liquid in shell type heat exchanger with slant stream tubes, and related heat transfer coefficient of shell side liquid under lower coequal Re operating condition (OC); and SMBP intensifies thermal conduction, and eliminates flow dead zone so as to reduce pressure drop of shell side under higher Re OC. The invention is suitable to OC, where higher heat transfer coefficient is required, and applied power is limited.

The invention discloses a microbial remediation method for cadmium-polluted bottom mud, and belongs to the field of microbial remediation of the bottom mud. The method comprises the following steps: enriching sulfate reducing bacteria, domesticating the sulfate reducing bacteria and expanding culture of the sulfate reducing bacteria; and repairing the Cd-polluted bottom mud by using the sulfate reducing bacteria. According to the method, the sulfate reducing bacteria and compound bacteria are added into the Cd-polluted bottom mud after separation identification, the content of the exchangeable form and the carbonate binding form of the Cd can be reduced, the content of the iron-manganese oxide binding form, the organic matter binding form and the residue form can be increased, so that the Cd is converted into a stable form, the content of the Cd in pore water of the repaired bottom mud is obviously reduced, and therefore the mobility, the biological effectiveness and the toxicity of the Cd are reduced. The method has the characteristics of being simple in technology, low in cost, good in remediation effect and large in in-situ application potential and the like.

The invention relates to a method for synthesizing an aluminum-based composite material by multielement magnetic field combined fusant reaction, which belongs to the technical field of preparation of materials. In the method, the fusant reaction synthesizing process is divided into three phases of reactant dispersion, contact chemical reaction and reaction product dispersion and by-product separation according to the characteristic that the fusant synthesizing reaction is solid-liquid phase reaction; and a corresponding combined magnetic field is applied according to different characteristics of all phases to carry out control. A high-frequency magnetic field and a low-frequency traveling wave magnetic field are applied in the reactant dispersion phase to improve the dispersing effect and the dispersing rate of a reactant; a pulse magnetic field and the low-frequency traveling wave magnetic field are applied in the contact reaction phase to accelerate the in-situ reaction course in a fusant; and the high-frequency magnetic field and the pulse magnetic field are applied in the reaction product dispersion and by-product discharge phase to control the clustering of particles and be beneficial to separating slag phases. The method can realize accurate control on the reaction synthesizing process of the fusant, improves the synthesizing efficiency and is beneficial to improving the quality of the composite material fusant.

The invention provides a comprehensive utilization device for desulfurization and denitrification. The device comprises an evaporator, a desulfurization and denitrification tower, an ammonia water tank, a concentration and separation tower, wherein a desulfurization chamber and a denitration chamber are arranged inside the desulfurization and denitration tower; the denitrification chamber is arranged above the desulfurization chamber; an ammonia-water atomization spray nozzle is arranged inside the desulfurization chamber; a flue gas inlet of the desulfurization and denitration tower is arranged below the ammonia-water atomization spray nozzle; an ozone and flue gas mixer is arranged inside the denitration chamber and communicates with an ozone source arranged outside of the desulfurization and denitration tower; the ozone and flue gas mixer is composed of a horizontal coil pipe and a vertical straight pipe; the horizontal coil pipe is arranged outside of the vertical straight pipe; the lower side of the horizontal coil pipe is provided with a plurality of first gas jet outlets; the inner side of the horizontal coil pipe is provided with a plurality of first cylindrical pins; the vertical straight pipe is provided with a plurality of second gas jet outlets; the outer side wall of the vertical straight pipe is provided with a plurality of second cylindrical pins; and the first gas jet outlets and the second jet outlets form a downward inclined angle a. The comprehensive utilization device provided by the invention has good desulfurization and denitrification rates, can obtain an ammonium sulfate solution with higher concentration at the same time, facilitates to production of a high-grade ammonia fertilizer, and achieves comprehensive utilization of desulfurization and denitrification of the flue gas.

The invention relates to an outer wind shield for a vehicle. The outer wind shield is characterized in that a guide groove is arranged at the vehicle bottom position of the outer wind shield, thus guide space of air flow can be increased, and the influence on the outer wind shield due to air flow disturbance at the vehicle bottom can be improved; a protecting steel sleeve is added at the installation hole position of the outer wind shield, thus the stress concentration on rubber due to installation threads can be reduced, the stressed area of an installation hole can be increased, the stress distribution situation of the installation hole can be improved, and the anti-bending performance of the outer wind shield can be increased through the supporting of the protecting steel sleeve; and a certain inwards-inclined angle exists between a wing plate of the outer wing shield and a vehicle body direction, thus pressure difference at two sides of the outer wind shield can be reduced, the eversion aerodynamic force suffered by the outer wind shield can be reduced, the air flow environment of the whole outer wind shield can be improved, the inwards-inclined angle is not less than 2 degrees, and the force distribution of the air flow on the outer wind shield can be more facilitated. According to the outer wind shield disclosed by the invention, through the improvement, the defect that the outer wind shield is in eversion or avulsion when a train is in high-speed running can be overcome, the service life of the outer wind shield is prolonged, and the replacing and repairing cost can be reduced.

The invention relates to an air flow velocity and temperature composite measuring device for a low velocity flow field. The device comprises a wind deflector, a connecting support arm fixedly arranged on the wind deflector, and a total pressure pipe and a static pressure pipe which are arranged on the wind deflector and respectively connected with the inside of the wind deflector. Two ends of the wind deflector are provided with a wind deflector air inlet and a wind deflector air outlet respectively. A thermocouple is arranged at the wind deflector air outlet. Compared with the prior art, the device of the invention ensures that the direction of the total pressure pipe is consistent with the direction of an incoming flow and reduces the sensitivity to the incoming flow by the arrangement of the wind deflector hood; and the device has a compact size, can measure the air flow velocity and temperature of a low velocity field simultaneously in a region with a small space and complicated flow, is high in environmental adaptability, accurate in measurement, high in stability and small in disturbance to the flow field, avoids the interference to the measured region during the measurement, can be installed separately and also be assembled through a threaded rod into a measurement array, and is simple in layout and high in flexibility.

The invention relates to an antagonistic attack and defense method and system based on a PID controller. The method comprises the following steps: S1, inputting a training data set and a machine learning model f; s2, training a machine learning model f according to the input training data set; and S3, judging whether the loss function J is converged or not, if the loss function J is not converged,training the machine learning model f by adopting the adversarial sample xadv generated by the adversarial attack based on the PID controller and the original data x as a training data set until theloss function J is converged to obtain the trained machine learning model f, and if the loss function J is converged, directly outputting a result. According to the invention, a higher attack successrate can be realized under the same disturbance constraint limitation through a process of generating an adversarial sample by an adversarial attack, and the invention can be used for evaluating the performance of a machine learning model and the effectiveness of an adversarial defense method; adversarial training on the machine learning model by using adversarial samples generated by adversarialattacks can be used as a defense method to improve the robustness of the model.

The invention belongs to the field of plastic recycling, and particularly discloses a waste plastic rinsing system. The system aims to solve the problem that an existing rinsing device has low recycling efficiency with the following solutions. The waste plastic rinsing system includes a rinsing box, a water-containing box, a mounting box and a rinsing mechanism, wherein the water -containing box is fixedly arranged at one side of the rinsing box, the mounting box is fixedly arranged at the top of the water-containing box, the rinsing box communicates with the water-containing box, one side, close to the water-containing box, of the rinsing box is provided with an opening, the front of the water-containing box is fixedly provided with a controlling platform, and the rinsing mechanism includes a flushing assembly, a drying assembly, a driving assembly, and a loading assembly. The waste plastic rinsing system has the advantages that the system not only has good rinsing effect, but also the materials can quickly be dried after being rinsed, the continuity of the drying and rinsing process is good, the transfer processing time is greatly shortened, the recycling efficiency is improved,and the two processes can be driven to finish with only a second motor, so that less driving devices are needed to be installed to a certain extent and the cost is reduced.

The invention discloses a microalgae culture device comprising a closed reactor assembly, two negative pressure liquid storage tanks, a control electric cabinet, a simple air purification device, andan auxiliary water pump. The microalgae culture device achieves the purpose of negative pressure high-efficiency driving through alternate liquid storage of the two negative pressure liquid storage tanks; the device not only overcomes the defect that the conventional open culture cannot realize sterile culture, but also has the advantages of smaller shear force and better culture solution disturbance effect in the culture process compared with closed culture devices driven in other ways, less damages to algae cells, capability of obtaining higher density algae liquid, low energy consumption and the like.

The invention relates to a fluidized bed gasification reaction method and a reactor employing packed fuel, and belongs to the field of gasification utilization of biomass energy. In the device, rich biomass straw resources in China are packed to serve as gasification raw materials, the packs are scattered by a front-furnace scattering device for feeding, and the problem that the conventional auger feeding equipment is easily damaged. By adopting low-true density porcelain granule sand as bed materials, the problem of easy slagging of the traditional quartz sand bed materials is effectively solved. The gasification reactor is a bubbling fluidized bed, is low in fluidizing velocity and effectively reduces the combustible ratio in fly ash. By adopting the expanded design, a gasification reactor body can reduce a fluidized dead zone of the bed materials, accelerate the bed materials to form an inner cycle and improve the fluidization quality. Therefore, the high-efficiency utilization of biomass straws is realized, and the device can be used as an ideal device for combining pulverized-coal fired boilers with biomass in future.

The invention discloses a detachable anti-scaling efficient evaporator for a water source heat pump, and belongs to the technical field of evaporators for water source heat pumps and hot water units.The evaporator comprises a shell, a cover plate, flow guide plates, a heat exchange straight pipe and a heat exchange pipe bend, the shell and the cover plate are fixedly connected in a seal manner, the shell is provided with a water inlet flange, a water outlet flange and a sewage draining exit, the flow guide plates are mounted in the shell, the flow guide plates are mounted in an up and down staggering manner at equal distances, the heat exchange straight pipe is mounted in the shell, and penetrates through the flow guide plates to be fixedly mounted, joints on the two ends of the heat exchange straight pie are arranged outside the shell, and the ends of the heat exchange straight pipe are connected through the heat exchange pipe bend. According to the evaporator for the heat pump and ahot water unit, a new heat exchange pipe bundle layout is adopted, due to a non-pressure container type, dismounting, mounting and cleaning at any time can be facilitated, dirt, filth blockage and corrosion problems can be effectively solved, and the reliability is extremely high.

The invention provides a trapezoidal tilted baffle plate shell and tube type heat exchanger. The exchanger comprises a shell body, heat exchange tubes, tube sheets, pull rods and trapezoidal baffle plates. Two groups of adjacent trapezoidal baffle plates are in perpendicular arrangement. Each group of trapezoidal baffle plates includes at least tow parallel trapezoidal baffle plates. The trapezoidal baffle plate is provided with a plurality of evenly distributed holes for mounting the heat exchange tubes correspondingly, which pass through the holes. The trapezoidal baffle plates are placed in a tilted mode. The rims of the trapezoidal baffle plates are provided with evenly distributed tube fixing holes for mounting the pull rods correspondingly which pass through the tube fixing holes. The pull rods are covered by the tube distance fixers in a sleeve mode. The tube distance fixers are fixed to the pull rods by bolts. The heat exchanger has the advantage of being able to effectively enhance the heat exchanging efficiency, being easily processed, and having broad application prospect.

The invention discloses a cutting fluid recovery device for a numerically controlled machine tool, and relates to the technical field of cutting fluid recovery. Including a frame, the top of the frame is installed with two side plates, the two side plates are arranged in parallel, and a baffle plate assembly is arranged between the two side plates, and the two ends of the baffle plate assembly are respectively connected to the side plates of the side plate. Both ends are flush; the guide plate assembly includes several guide plates, which are arranged in parallel and are arranged in a stepped shape from bottom to top, and a guide plate is connected between two adjacent guide plates. The vertical plate, the guide plate and the two sides of the guide vertical plate are respectively in contact with the inner sides of the two side plates; one end of the guide plate assembly is provided with a liquid inlet box, and the other end is provided with a liquid discharge box, and the liquid inlet box, The tops of the liquid discharge box and the side plate are flush, and a discharge pipe is installed on the liquid discharge box; an intercepting mechanism is respectively provided above each guide plate. The invention has the advantages of being convenient for retaining debris, convenient for recycling processing of cutting fluid and cleaning of debris.