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162results about How to "Reduce remaining amount" patented technology

Method for actively regulating mixture ratio of spacecraft propellant

A method for actively regulating mixture ratio of a spacecraft propellant comprises the following steps: conducting trial run before installing an engine with high consumption into a spacecraft propelling system, determining working parameters, and reaching a standard mixture ratio of an oxidant to fuel at a standard inlet pressure by regulating system hardware; arranging a pressure sensor at an oxidant and fuel inlet, and arranging a self-locking gas supply valve on pressurizing pipelines at the upstream of an oxidant storage tank and a fuel storage tank respectively; and in the working process of the engine, acquiring pressure parameters of the fuel and the oxidant at the inlet of the engine in real time through a propelling system controller, and comparing and regulating the pressure parameters to control the pressures of the two propellants at the inlet of the engine to be very close, so that the deviation level of the total mixture ratio of the propellant can be controlled. By the method, the utilization ratio of the propellant of the spacecraft propelling system is effectively improved, so that the service life of a spacecraft is prolonged, the effective load mass of the spacecraft is improved and the production cost of the spacecraft is reduced.
Owner:SHANGHAI INST OF SPACE PROPULSION

Oxidized graphene and water-soluble vinyl monomer copolymerized leather tanning agent and preparation method thereof

The invention discloses an oxidized graphene and water-soluble vinyl monomer copolymerized leather tanning agent. The leather tanning agent is prepared from the following raw materials in parts by weight: 20-30 parts of oxidized graphene nanosheet dispersion liquid, 0.5-1 part of an oxidizing agent, 60-80 parts of a monomer mixed solution, and 20-30 parts of an initiator. The invention further discloses a preparation method of the oxidized graphene and water-soluble vinyl monomer copolymerized leather tanning agent. The preparation method adopts the water-solution free radical polymerization reaction to implement the free radical copolymerization reaction for double bonds in the oxidized graphene structure and the water-soluble vinyl monomer, so that the obtained copolymer both comprises the oxidized graphene nanosheet and the water-based vinyl structural unit; furthermore, the size of the oxidized graphene nanosheet can be reduced and the distribution can be more uniform, and the tanning agent can generate the chemical bond function and the nanometer size effect after the tanning agent permeates the leather collagenous fibers, so as to obtain the tanning effect on the leather fibers; the tanning agent can serve as the leather tanning agent separately.
Owner:苏州盛泽科技创业园发展有限公司

Domestic sewage integrated treatment unit

The invention designs a sewage treatment device and particularly relates to a domestic sewage integrated treatment unit used for treating the non-traditional sewage (no flushing water). The domestic sewage integrated treatment unit comprises a reaction vessel, biology filler and a micro-filtration membrane module, wherein a water inlet pipe 10 is arranged at one side in the reaction vessel 5; one end of the water inlet pipe 10 extends into the bottom of the reaction vessel 5 and is connected with an aerator pipe 7 of a water inlet system arranged at the bottom of the reaction vessel 5; an air inlet pipe 12 is arranged at the other side in the reaction vessel 5; one end of the air inlet pipe 12 extends into the bottom of the reaction vessel 5 and is connected with an aerator pipe 8 of an air inlet system arranged at the bottom of the reaction vessel 5; and after being connected in series, the filler 4 is suspended on an aerator hole 13 of the aerator pipe 7 of the water inlet system. Aiming at the characteristics of the China specific domestic sewage, the invention provides the domestic sewage integrated treatment unit which is economically feasible really and has the advantages of small occupied area, simple process and low operating cost.
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI

Hot plate type continuous vacuum drying system

The invention relates to a hot-plate type continuous vacuum drying system, comprising a main machine and a cylinder of the main machine; a main shaft is arranged inside the cylinder of the main machine; a bed bracket is arranged on the inner wall of the cylinder; a plurality of layers of plate-style jacket heating devices are arranged on the bed bracket; the main shaft passes through central apertures of each plate-style jacket heating device and is arranged between the top and the bottom of the cylinder; the upper end faces of the plate-style jacket heating devices are material-bearing faces; the main shaft is provided with a plurality of branch arms and material turning plates are arranged on the lower end faces of the branch arms; and the plate-style jacket heating device is a plate jacket casing inside which a heat conducting pipeline is arranged; the plurality of layers of plate-style jacket heating devices can be at least divided into a high-temperature layer group, an intermediate-temperature layer group, a low-temperature layer group and a cooling layer group from top to bottom. The hot-plate constant vacuum drying system adopts the combined heating system adopting both drying and cooling so as to reduce the processes and largely enhance the manufacturing efficiency and the productivity; and simultaneously the drying system can realize the constant vacuum feeding and discharging, solvent recycling and disposal of harmful gas.
Owner:查晓峰

Auxiliary support structure and application method thereof for laser selective forming of suspended plane

The invention discloses an auxiliary support structure and an application method thereof for laser selective forming of a suspended plane and belongs to the technical field of additive manufacturing.The auxiliary support structure comprises at least one back-up block. A first supporting plane, a second supporting plane and a suspending plane are arranged on the back-up block. The first supportingplane is used for connecting a suspending plane of a product and supporting the suspending plane. The second supporting plane is used for connecting an inner surface of the product. The plane of thesuspending plane is crossing with the first supporting plane and the second supporting plane. Due to the suspending plane, the volume of the support structure can reduce more than 40%, the forming time of the auxiliary support structure is reduced, the volume of the row material is reduced. The cost of production is saved. Meanwhile, the probability of a partial disintegrate and collapse of the auxiliary support structure for laser selective forming of suspended surface in forming process are significantly reduced. The probability of wrapping and deforming is also significantly reduced. The qualified rate is improved.
Owner:CAPITAL AEROSPACE MACHINERY +1

Method and apparatus for desolvating flowing liquid

Methods and apparatus for desolvating flowing liquid streams while retaining temporal resolution of dissolved substrates are disclosed. A novel small-scale self-regulating spray dryer preserves temporal resolution while desolvating a liquid chromatography eluent stream and depositing the solute onto an optical surface for infrared spectrographic analysis. The liquid eluent is pumped through a heated nebulizer to create a high-speed jet of solute containing liquid and solvent vapor. This jet is directed circumferentially inside a hot cylindrical cavity. Centrifugal force causes the larger liquid droplets to travel along the outer diameter of the cavity. The cavity surface is heated to cause the droplets to film boil. Film boiling reduces droplet contact with the cavity surface thereby retaining the solute in the droplets. The solute temperature is limited by controlling the pressure into which the solvent evaporates from the droplets. When the droplets are sufficiently small, Stokes drag from the exiting solvent vapor carries the droplets out through the center of the cylindrical cavity. After exiting, the superheated solvent vapor further dries the droplets. Solvent vapor is removed by condensation onto a cooled surface. A freezing point reducing agent may be added to improve removal of solvent condensate. Stokes drag from a non-condensable gas maintains the dried droplets in suspension. This suspension travels through an orifice that focuses the impaction of the dried droplets onto the optical surface for infrared analysis. The deposition surface is in an evacuated chamber and is temperature controlled to freeze liquid solutes yet allowing sublimation of residual solvent.
Owner:SPECTRA ANALYSIS INSTR
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