43results about How to "Reduce steam pressure" patented technology

This invention provides a high heat transfer performance liquid nano-metal. It relates to cooling fluid working medium, and especially it can be used under high rush density condition which need high intensity cooling fluid working medium for heat exchanging and cooling, such as computer array and reactor. The solvent of this invention is liquid metal, and the soluble of this invention is nanometer particle. This invention solve the problem of high price of present metal liquid cooling working medium and the limited performance of common metal liquid, leaking out easily taken place using common liquid and easy forming sediment of present nanometer cooling agent.

The invention discloses a novel drying oven. The novel drying oven comprises an oven shell, an air exhaustion hole, an air inlet, a flat plate and a support used for placing the flat plate, wherein a tray used for placing dried materials is arranged on the flat plate; the flat plate is an air-permeable type flat plate; and an air inlet tube is arranged on a drying box for inlet nitrogen or carbon dioxide or inert gases. In the novel drying oven, steam evaporated from wet materials to be dried can be quickly exhausted through an air-permeable structure due to the adoption of the air-permeable type flat plate, and the mass transfer is rapid, so steam pressure of the evaporated steam is lowered, the steam is not easily detained and condensed, and the drying speed is greatly improved; and under the condition of introducing a proper gas such as nitrogen into the air inlet tube, permeable holes can obviously improve the flowing and distribution of the nitrogen in the drying oven, so the steam at all parts of the drying oven can be quickly taken away along with the nitrogen, and the drying speed is further quickened.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region. A cap is sealable on the holder. A plug is positioned in the body. The plug has a wall having a spiral formed groove therein in communication with the internal chamber region. An opening provides for a single flow path for communication between the environs and the internal chamber via the groove.

The invention discloses a high strength sprayed concrete for high ground temperature tunnels and a preparation method thereof. The concrete comprises following raw materials: cement, fly ash, slag powder, sand, coarse aggregate, glass beads, PVA fibers, steel fibers, modified rubber, a water reducer, a setting accelerator, and water. Low melting point water-soluble PVA fibers are adopted, after concrete reaches the melting point of the PVA fibers, fibers are melted, tunnels are formed, thus water steam in the concrete can be conveniently dissipated through the tunnels, the steam pressure in the concrete is reduced, the risk of bursting is reduced, at the same time, the melted water-soluble PVA fibers can largely enhance the inner cohesive force of concrete, and the cracking of a cement face is avoided. Through the cooperation of all raw materials, the prepared concrete has the characteristics of low heat conductivity coefficient, good anti-permeability, high interfacial bond strength,and little long-term strength loss. The long-term strength of concrete after spraying is largely improved. The cracking of high ground temperature concrete is avoided.

The invention discloses a pretreatment method of cellulosic ethanol raw materials. The pretreatment method is characterized in comprising following steps: step 1, cellulose raw material is delivered into a screw feeder (20) for squeeze dehydration so as to remove at least a part of water of the cellulose raw material and obtain a compact product, wherein dry substance content of the compact product accounts for 20 to 50wt%; step 2, the compact product is delivered into a first-stage steam receiver (30), and is scattered, and the scattered cellulose raw material is subjected to first-stage steam treatment, wherein pH value of steam in the first-stage steam receiver (30) is lower than 7; and step 3, the cellulose raw material processed via first-stage steam treatment is delivered into a second-stage steam receiver (40) for second-stage steam treatment. The pretreatment method is used for pretreatment of cellulose raw material so as to reduce energy consumption; and the amount of inhibition substances generated when the cellulose raw material is subjected to steam treatment can be reduced; and recovery rate of cellulose and recovery rate of hemicellulose are increased.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region. A cap is sealable on the holder. A plug is positioned in the body. The plug has a wall having a spiral formed groove therein in communication with the internal chamber region. An opening provides for a single flow path for communication between the environs and the internal chamber via the groove.

A method for manufacturing a creped fiber web is provided and includes providing a rotating cylindrical dryer surface, providing a creping adhesive composition or coating package having a pH boosted at least 0.5 pH units relative to its original base formulation pH in the range of from about 4.5 to about 9, for chemically setting a crosslinkable polymer component at least in part before applying the creping adhesive composition to the rotating cylindrical dryer surface to provide an adhesive dryer surface on which a fiber web can be transferred, dried, and creped.

The invention discloses a phase-change heat-storage large capsule with a metal core material coated with a ceramic shell and a preparation method of the phase-change heat-storage large capsule. The preparation method comprises the following steps: preparing a spherical metal core material from a metal powder raw material, then evenly coating the surface of the spherical metal core material with alayer of ceramic slurry, conducing forming and drying to obtain the large capsule with the metal core material coated with the ceramic shell, and finally, carrying out two-stage heat treatment consisting of low-temperature presintering and high-temperature sintering to prepare the phase-change heat-storage large capsule with the metal core material coated with the ceramic shell. The large capsuleis a spherical capsule with a diameter of 1-50 mm and structurally comprises a ceramic shell layer and a metal core, wherein the diameter of the metal core is 0.5-30 mm, and a hole is formed in the metal core layer. The spherical large capsule prepared by the method can effectively solve the problems of volume expansion of metal at high temperature and liquid phase leakage at high temperature; andthe preparation method is simple in process, friendly to environment and suitable for industrial batch production.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region. A cap is sealable on the holder. An opening is defined in the body or cap that forms a single tortuous ingress and egress path communicating the interior chamber with the environs. An insulating layer is disposed over the body and cap to fully insulate the body and cap other than over the opening so as to not interfere with the ingress and egress path. The insulating layer reduces the heat transference from the environs to the interior chamber region.

The invention discloses an easily melted foamed polyethylene bead with strong temperature tolerance and a preparation method thereof. Low density polyethylene with a Vicat softening point of 90 to 105DEG C and high density polyethylene are compounded, at the same time, an inorganic compounding foaming aid is adopted, and through the synergistic effect generated by three components, goals of easily melting and high temperature tolerance are realized. Through the cooperation of formula and technology, the size of inner pores of primarily foamed EPE beads is controlled in a range of 200 to 230 [mu]m, after foaming, no thermal insulation device is needed, and a step of introducing steam with a certain air pressure into a pipe for delivering polypropylene resin particles is not needed either.The moulding steam pressure is obviously reduced, the melting stability between particles is excellent, and the curing degree is 95% or more. Because the inner pores in the beads are increased, and the pore uniformity is increased, the polyethylene bead can tolerate a certain moulding temperature, the stiffness of pores in the surface of a moulded product is improved, and the beauty of the surfaceof a EPE bead moulded product is obviously improved.

A mixed carbonate heat transfer and heat storage working medium comprises the following molten salt components by mole fraction: 20%-40% of K2CO3, 23%-42% of Li2CO3, 30%-60% of Na2CO3, and 5.5-15% of CaCO3. The molten salt working medium has the advantages of high heat transfer coefficient, high working temperature, less corrosion, low vapor pressure, environmental-friendliness, good safety and the like.

The invention relates to a preparation method of block-shaped rice noodles. The preparation method comprises the following steps of uniformly mixing potato starch with sweet potato starch, pea starch, corn starch, buckwheat flour, black rice, sorghum and wheat kernels, then performing grinding to obtain mixed powder materials, and screening the mixed powder materials with a 160-200-mesh screen stencil; adding purified water to the screened mixed powder materials to form paste, wherein the mixed powder materials are 30-40% of the total weight of the paste, then adding carrageenin which is 0.3% of the total weight of the paste to be used as a texture improver, performing stirring and uniform mixing to obtain noodle dough, letting steam in, performing primary steaming, wherein the primary steaming time is 5-12 minutes, and the steam pressure is 0.3-0.5MPa; putting the steamed noodle dough into a rice noodle making machine, performing vermicelli extruding to obtain rice vermicelli, performing re-steaming under the condition of re-steaming time being 8-12 minutes and re-steaming pressure being 0.1MPa, and after re-steaming, cutting the steamed rice vermicelli into segments; and conveying the rice vermicelli segments into a drying box for drying, after drying, controlling the water content to be 11-13wt%, and performing cooling so as to obtain finished products. The block-shaped rice noodles produced by the method disclosed by the invention are good in mouth feel and rich in nutrition.

The invention relates to a process for the absorptive separation of NH₃ and CH₄ from a gas under high pressure, which at least contains NH₃, H₂, N₂ and CH₄, using a high-boiling, physically acting and regenerable solvent which contains homologues of alkylene glycol-alkyl-ether and which also may contain water, the absorbed components NH₃, H₂, N₂ and CH₄ being separated from the laden solvent in at least two further process steps at different pressure rates, thereby withdrawing at least one NH₃-rich and at least one CH₄-rich gas fraction from the solvent. This process is particularly suitable to be incorporated as unit in an ammonia production plant.