45 results about "Trickle flow" patented technology

The invention discloses a method for preparing an ultra-high molecular weight polyethylene fiber. According to the method, an ultra-high molecular weight polyethylene decahydronaphthalene solution is extruded through a spinneret plate to form a spinning trickle flow; the spinning trickle flow sequentially passes through a gas-phase section, a liquid-phase section, a physical extrusion section, a drying heat tank section and the like to obtain raw filaments; meanwhile, thin spinning filaments exiting from the liquid-phase section have stretching stress, and the raw filaments are subjected to high-power thermal stretching to obtain the ultra-high molecular weight polyethylene fiber of which the single-filament fineness is lower than 0.3dtex. The breaking strength of fiber bundle filaments is not lower than 40cN.dtex<-1>, and the modulus is not lower than 2,000cN.dtex<-1>. The method has the characteristics that the production energy consumption is reduced; the energy is saved, the emission amount is reduced, and the production cost is low. The prepared ultra-high molecular weight polyethylene fiber has excellent quality and is used for preparing public safety protection articles, labor safety products and medical materials such as bulletproof and stab-resistant clothes, explosion-proof blankets, explosion-proof tanks, anti-puncturing shoes, anti-puncturing shoe soles and operation suture lines.

The invention relates to a preparation method of polyacrylonitrile fibres by using protein as a modifier. The preparation method comprises the following steps of (1) dissolving protein and polyacrylonitrile in an ionic liquid, and preparing a homogeneous-phase mixed spinning solution; (2) defoaming, filtering and measuring the spinning solution, and then extruding via a spinning jet to form a spinning trickle flow, and passing the spinning trickle flow through a humid air layer and then entering into a coagulating bath, and performing coagulating forming; and (3) performing pre-drawing, drawing, water-washing, drying and heat-setting, and then performing spinning forming, so as to prepare protein-modified polyacrylonitrile filaments or short fibres.

The invention discloses an image measurement method for flow parameters in a gas-liquid-solid three-phase system, comprising the steps of image acquisition, image preprocessing, artificial neural network modeling, phase volume fraction parameter extraction and the like, and the flow parameters such as gas phase area, liquid phase area, liquid phase fraction, gas phase fraction and the like can beobtained through the method. Furthermore, the image measurement method processes images at different moments under the same experiment condition to obtain data of the flow parameters changing along with time; Typical flow patterns such as trickle flow, pulse flow and bubbling flow can be identified through statistical analysis. The method can overcome the defects of the existing image recognitiontechnology, breaks through the limitation of extracting quantitative gas-liquid flow parameters by images, and further improves the recognition accuracy of the gas-liquid flow pattern.

The invention discloses an open flow flow table refreshing method. Table items in a table item lookup chip are divided into a plurality of position intervals according to priorities to enable the priorities of the plurality of continuous table items in the same position interval to be equal to each other, the table items of which the priorities are lower than the priority of a new table item in an open flow flow table are determined when whether the new table item needs to be inserted or not is determined and a first table item is placed behind an end table item in every position interval corresponding to the table items in turn, and accordingly the new table item can be inserted into the unoccupied position behind the table items of which the priority is equal to that of the new table item. Accordingly, the updating efficiency of the open flow flow table in the table item lookup chip is effectively improved under the condition that the processing accuracy is ensured.

A remote shower actuator and temperature sensing unit installs in a shower having a shower head in a water line that is downstream of hot and cold water mixing for the shower. The shower actuator includes a battery powered wireless actuated blocking valve, a digital temperature sensor mechanism, a temperature indicating mechanism and generally two independent one wireless controllers. The valve may move between a closed position, an open position and a trickle flow position. The trickle flow position is a significantly reduced flow in response to a potentially hazardous temperature reading. The temperature indicating mechanism may be a visible display on the controllers that constantly displays the measured temperatures, or may be a visible or audible indicator on the controllers that identifies that the flowing water temperature has reached an acceptable steady state temperature, or a combination of the two.

The one-step process of preparing hydantoin is that in a trickle bed reactor hydroxy methyl cyanide, CO2 and ammonia as material and solid acid as stuffing and catalyst are prepared into hydantoin through one-step process. Hydroxy methyl cyanide is made to flow into the trickle bed from the top in the flow rate of 100-300 ml/hr, CO2 and ammonia are made to flow into the trickle bed from the bottom in the flow rate of 0.01-0.1 cu m/hr and 0.005-0.06 cu m/hr separately, and through reaction at 40-120 deg.c for 2-5 hr, the reaction liquid is collected and processed through concentration, crystallization, filtering to obtain initial crystal, recrystallization and drying to obtain hydantoin. The synthesis yield may reach 74.85 %.

The invention discloses a method for preparing 1, 3-butanediol through catalytic hydrogenation, and belongs to the technical field of catalytic hydrogenation. 3-hydroxybutyraldehyde is taken as a rawmaterial, and catalytic hydrogenation reaction is carried out in a trickle bed reactor in the presence of a supported metal nickel catalyst and an alkaline solvent under the hydrogen atmosphere of 293-3733K and 1.0-8.0MPa. Under optimized conditions, the hydrogenation conversion rate of 3-hydroxybutyraldehyde can reach 86%, and the selectivity of 1, 3-butanediol can reach 88%.

A water system uses a pressure reservoir of an extremely small size. A valve device is placed between a water pump and the pressure reservoir. The valve device has a constant outlet pressure to limit the flow from the pump at high pressures. The pump is turned on and off by a pressure on/off switch. The valve device maintains the pressure to the reservoir at or below the off switch pressure except for a trickle flow. The trickle flow fills the reservoir when there is little or no water usage from the reservoir. The trickle flow is achieved by preventing the surfaces to seal by a projection or notch the valve surfaces of the valve device. Each time the valve opens any debris is washed from the valve surfaces thereby keeping them free of debris.

The invention provides a network flow statistics method and device, electronic equipment and a storage medium, and the method comprises the steps: carrying out the first processing of a Flow flow through employing a first set number of uplink threads according to the data size of the Flow flow, and writing the processed Flow flow into a cache queue; adopting a second set number of downlink threadsto perform second processing on the Flow flow written in the cache queue, each uplink thread having the same processing capability as each downlink thread; if the cache queue is fully written, addinga first number of downlink threads; and if the cache queue is empty, deleting the second number of downlink threads. According to the method and the device, the thread group is adopted to perform synchronous processing on the Flow flows, and the processing capacity of the thread group is dynamically regulated and controlled by judging whether the cache queue is fully written or empty or not and increasing or decreasing the number of the downlink threads, so that the problems of fixed processing capacity and lack of cooperative cooperation among processing steps in the prior art are solved.

The invention discloses a production process and process equipment for polyester crimped yarn, wherein the production process is as follows: drying the copolyester chips, putting the dried copolyester chips into an extrusion device, heating and melting the copolyester chips to obtain the copolyester chips melt; pressing the copolyester chips melt into a spinning beam, measuring the flow by a measuring pump and flowing into the spinning components, and then enabling the copolyester chips melt to pass through a spinneret plate of the spinning components, so as to obtain copolyester chips melt trickle flow, and then cooling and solidifying the copolyester chips melt trickle flow through a cooling and solidifying device to obtain the copolyester yarn; treating the copolyester yarn successively by the steps of applying oil via a lubricating nipple, pre-network and heat-setting, and then winding and forming. The process equipment comprises a drying device, an extrusion device, a spinning beam, a cooling and solidifying device and a winding and forming device which are connected in sequence according to the order. The polyester crimped yarn produced by the production process provided by the invention has the characteristics of silk-like sheen and feel, fabric bright sense, elegant and soft silk light perception; the polyester crimped yarn not only has excellent optical properties, but also realizes good air permeability and has a super bright glittery effect.

This invention has disclosed a kind of continuously producing method for substituted benzyl alcohol and its device. Mix substituted benzyl halogen and water, the mixture and steam pass the trickle-bed reactor side-by-side, hydrolyzing and separating continuously, producing substituted benzyl alcohol. This device is trickle-bed reactor, including mixing device, reactor, condenser, heat exchanger, extraction reactor, evaporator, rectification tower. This method is simple and environmental protection, costs little, quality of production is high, could product continuously. This device is of simple structure and easy to operate.

The invention discloses heat-storage temperature-adjustment fiber and a preparation method thereof. According to the invention, fiber is taken as a sheath core structure, a sheath layer is a fiber-forming polymer, and a core layer is a comb high-molecular phase-transition material; the comb high-molecular phase-transition material is poly(ethylene-g-maleic anhydride)-g-alphanol; and according to the mass percentage, the mass of the comb high-molecular phase-transition material accounts for 30-70% of that of the heat-storage temperature-adjustment fiber. The preparation method comprises the following steps: 1) performing respective fusion extrusion on dried raw materials, passing the materials through a filter screen and a shaped spinneret plate to obtain spinning trickle flow; 2) performing air bath cooling and drying on the spinning trickle flow at the temperature of 0-40 DEG C, and reeling the material at the speed of 500-3500 m/min for forming fiber, or directly collecting the material without reeling to obtain nascent fiber; and 3) after post-treatment, obtaining the heat-storage temperature-adjustment fibers with different forms. The phase-transition heat-storage value of theheat-storage temperature-adjustment fiber is 43-102 J/g, no supercooling crystallization and liquid external migration phenomena is generated, after extracting tests, the mass loss late of the phase transition material does not exceed 5%.

A moisture removal system for removing water moisture from an air stream and an associated method are provided. The moisture removal system includes one or more packed beds that include a water-entry surface at which liquid water is received and an air-entry surface that is located substantially opposite the water-entry surface and at which the air stream is received. The air stream passes through the one or more packed beds in a direction substantially counter-current to the passage of the liquid water and the liquid water and the air stream contact one another in the one or more packed beds resulting in the removal of at least a portion of the water moisture from the air stream. The moisture removal system can be located upstream of and be operably connected to the inlet of a gas turbine system to which the air stream is delivered from the moisture removal system.