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High-temperature gas generating device on basis of porous medium combustion and heat storage

The invention discloses a high-temperature gas generating device on the basis of porous medium combustion and heat storage. The high-temperature gas generating device comprises a first porous medium heat storage chamber, a first porous medium combustion chamber, a high-temperature flue gas distribution chamber, a second porous medium combustion chamber and a second porous medium heat storage chamber which are sequentially communicated with one another; the first porous medium heat storage chamber is communicated with the second porous medium heat storage chamber by a four-way reversing valve, and other two ports of the four-way reversing valve are respectively connected with an air pipeline and a low-temperature flue gas pipeline; the first porous medium combustion chamber and the second porous medium combustion chamber are respectively connected with a first fuel gas pipeline and a second fuel gas pipeline; and a high-temperature flue gas pipeline is arranged on the high-temperature flue gas distribution chamber. The high-temperature gas generating device is additionally provided with a porous medium combustor on the basis of a heat storage combustor, gas such as gas of coal mines and industrial exit gas with a low heat value can be combusted to generate high-temperature gas, fuel gas can be directly filled into the combustion chambers without being premixed, and accordingly the high-temperature gas generating device is high in safety.
Owner:ZHEJIANG UNIV

Three-dimensional focused-flow micro-fluidic chip used for synthesis of liquid drops and preparation method thereof

The invention provides a three-dimensional focused-flow micro-fluidic chip used for synthesis of liquid drops and a preparation method thereof. The chip comprises a continuous-phase layer and a dispersed-phase layer; the continuous-phase layer comprises a continuous-phase channel, a continuous-phase fluid storage tank, an anti-blockage array structure, a fluid output channel and a fluid outlet; the dispersed-phase layer comprises a dispersed-phase channel, a dispersed-phase fluid storage tank and a contraction port; the continuous-phase channel begins at the continuous-phase fluid storage tank, passes through the anti-blockage array structure and is then divided into two branch continuous-phase channels which are symmetrically located at two sides of the dispersed-phase channel and intersect and communicate with each other at the outlet of the dispersed-phase channel, and then the continuous-phase channel enters the fluid output channel via the contraction port; the width of the contraction port is less than the width of the dispersed-phase channel; and the depth of the continuous-phase channel is greater than the depths of the dispersed-phase channel and the contraction port, and the outlet of the continuous-phase channel is located at the center of the continuous-phase channel in transverse and depth directions. The micro-fluidic chip can easily generate focused flow and stably produce submicron liquid drops.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Method for purifying cooking fume organic matter

The invention provides a method for purifying cooking fume organic matter. The method includes: air is fed into a to-be-processed area in a constant circulation manner to allow the cooking fume organic matter and oxygen to be physically sufficiently mixed to form mixed cooking fume organic matter; working gas at the starting end of the torch tube of a microwave plasma torch device is stimulated by a microwave electromagnetic field to generate high-energy electrons, the mixed cooking fume organic matter in the to-be-processed area is allowed to pass the plasma flame of the microwave plasma torch device, the high-energy electrons collide with the passing cooking fume organic matter to allow the molecular bonds of the cooking fume organic matter to sequentially break according to bond energy magnitude so as to generate small molecular substances and / or organic free radicals, the high-energy electrons collide with oxygen and water molecules to generate O free radicals, OH free radicals and active particles, and the small molecular substances and / or organic free radicals react with the O free radicals, OH free radicals or active particles to generate CO2 and H2O; the processed cooking fume is discharged out of a range hood. The method is suitable for being popularized in domestic range hoods, good in cooking fume removing effect and stable.
Owner:ZHEJIANG SUPCON RES

An improved method for generating a light quantum random number

The invention discloses an improved method for generating a light quantum random number, which is applied to a random number generator. The random number generator comprises a light source, a detectorarray and a random extractor. The implementation method comprises the following steps: homogenizing a light field emitted by a light source to a detector array; Receiving a bit stream generated by the detector array, and periodically counting an interval of pixel intensity distribution to obtain light intensity information; According to the light intensity information, judging whether each pixelintensity reaches a preset threshold or not, transmitting the bit stream generated by the detector array to a random extractor if, and judging whether the light intensity is greater than a preset light intensity value or not if not; When the light intensity is greater than the preset light intensity value, driving the light source to reduce the light emitting brightness; And when the light intensity is not greater than the preset light intensity value, driving the light source to improve the light emitting brightness. According to the invention, the calibration and association design on the random extractor can be avoided, the device is greatly simplified, and the generation of the random number is more stable.
Owner:徐文婷

Anti-scald health care ceramic product and preparation method thereof

InactiveCN110282965AUniform and dense poresLow thermal conductivityIonAluminum silicate
The invention discloses an anti-scald health care ceramic product. The anti-scald health care ceramic product comprises a green body and a glaze layer; the green body is prepared from the following raw materials in parts by weight: 30 to 45 parts of albite, 25 to 35 parts of anorthite, 12 to 16 parts of marble, 10 to 15 parts of bentonite, 12 to 17 parts of diatomaceous earth, 7 to 11 parts of glass fiber, and 4 to 6.5 parts of aluminum silicate fiber; the glaze layer is prepared from the following raw materials in parts by weight: 20 to 25 parts of albite, 15 to 20 parts of wollastonite powder, 17 to 20 parts of mullite powder, 10 to 15 parts of quartz, 5 to 8 parts of talc, 6 to 10 parts of opal, 4 to 7 parts of medical stone, 3 to 5 parts of tourmaline, 14 to 18 parts of violet gold clay, 9 to 13 parts of diatomaceous earth, and 4 to 8 parts of meteorolite powder. The anti-scald health care ceramic product disclosed by the invention is low in thermal conductivity and good in thermal insulation performance, and can effectively prevent users from being scalded; far infrared rays and magnetic fields can be generated to activate water contained in the ceramic product; negative ions, and the like can be generated.
Owner:福建省德化琦轩陶瓷工艺有限公司

Process for preparing concentrated sulfuric acid from industrial sulfur-containing tail gas

The invention discloses a process for preparing concentrated sulfuric acid from industrial sulfur-containing tail gas. The process comprises the following steps: introducing the sulfur-containing tail gas and air into a converter; carrying out a catalytic oxidation reaction under the action of a catalyst in order to convert sulfur-containing compounds such as H2S, Sx, COS and SO2 in the tail gas into SO3, CO2 and H2O; recovering heat through a residual heat recovering system, and introducing the SO3, the CO2 and the H2O into an acid tower; performing heat transfer by cooling water countercurrent contact, wherein concentrated sulfuric acid being 98 percent or above in percentage by mass can be prepared after condensation of sulfuric acid in a gas phase; the concentration of the sulfuric acid can be further increased by steam stripping of a stream of dry hot air in the acid tower; the temperature of the inlet of the converter is 350 to 500 DEG C; the temperature of the outlet is 400 to 600 DEG C; the operation pressure of the converter is -20 to 300kPaG; the operating temperature of the acid tower is 60 to 250 DEG C; the operating pressure of the acid tower is -20 to 300kPaG. The process can be widely applied to treatment of sulfur-containing tail gas produced in coal chemical industrial enterprises, petroleum enterprise and the like, and the sulfur-containing compounds in the tail gas are converted into the concentrated sulfuric acid.
Owner:SHANGHAI DONGHUA ENVIRONMENT ENG
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