Micro-flow control device of multilayer hole plate structure

The invention relates to a micro-flow control device of a multilayer hole plate structure. The micro-flow control device comprises connector assemblies (1), hole plates (2) and end cover plates (3). Each hole plate (2) is in a disc shape, a plurality of small holes are machined in the surface of the disc, channels are formed between the small holes through etching, the end cover plates (3) are in disc shapes, small holes are formed in the centers of the discs, the two end cover plates (3) are welded to the two sides of the discs of the hole plates (2), the center holes of the end cover plates (3) are communicated with the small holes in the centers of the hole plates (2), the small holes in the hole plates (2) are connected in series through the etched channels from the small hole in the center, and the small holes are finally led to the small hole in the center; the two connector assemblies (1) are connected with the two end cover plates (3) respectively.

Organic base catalyst for synthesizing aryl carboxylate through ester exchange

The invention relates to an organic base catalyst for synthesizing aryl carboxylate through ester exchange, belonging to the technical field of organic chemistry and catalytic chemistry. In a process of synthesizing aryl carboxylate through ester exchange, phenyl methyl oxalate and phenyloxalate are synthesized by using phenol and dimethyl oxalate as raw materials through ester exchange. The organic base catalyst is an organic compound containing nitrogen, phosphorus and halogen elements and immobilized organic base thereof; and hydroxyl on the surface of an immobilized heterogeneous catalyst is subjected to treatment of silane reagents with different polarities to obtain a catalyst with different surface polarities. The catalyst has good catalysis property, is easy to separate from a reaction system, is mild in ester exchange condition, convenient for continuation, and is suitable for industrialized application, wherein the transfer rate of the dimethyl oxalate can reach above 90 percent ...

Slurry circulating pump control method and device

The invention discloses a slurry circulating pump control method and device, and relates to the technical field of circulating pump control, and the method comprises the steps: determining the lift margin of a circulating pump based on the working parameters of the circulating pump and the pressure of a slurry nozzle; based on the linear correlation coefficient between the flue gas parameters and the linear correlation coefficient between the slurry property parameters, determining the correlation degree between the flue gas parameters and the correlation degree between the slurry property parameters; the slurry flow of the circulating pump is corrected according to the correlation degree between the flue gas parameters and the correlation degree between the slurry property parameters; determining a slurry adjusting amount, and determining an initial frequency adjusting value according to the slurry adjusting amount; determining the cavitation degree of each circulating pump according to ...

Energy-conservation and dust-removing method for ferroalloy furnace smoke waste heat power generation

The invention discloses an energy-conservation and dust-removing method for ferroalloy furnace smoke waste heat power generation. The energy-conservation and dust-removing method is characterized in that smoke in a ferroalloy furnace is exhausted through a fourth hole and mixed with cold air through a water cooling sliding sleeve and then enters a settling chamber; the smoke passing through the settling chamber enters a waste heat exchange chamber, the smoke discharges heat and directly enters a dust remover, and the smoke with the dust removed is pressed into an exhaust cylinder through a main fan and exhausted to the atmosphere; meanwhile, circulation water enters a heat pipe heat exchanger in the waste heat exchange chamber through a water pump to absorb the heat of the smoke, a formed gas and water mixture enters an evaporator, the heat is discharged, a low-boiling-point organic working medium passes through a working medium pump, absorbs the heat of the gas and water mixture in the ...

Catalyst for low temperature elimination of CO and its preparation process

Organic acid base catalyst for synthesizing aryl ester carboxylic acid by interesterification

The invention belongs to the technical fields of organic chemistry and catalytic chemistry, and relates to an organic acid-base catalyst which is used for carboxylic acid aryl-ester groups which are compounded by ester exchanges. The organic base in the organic acid-base catalyst refers to an organic compound which contains nitrogen, phosphorus and halogen elements and solid-carrying organic base of the organic base, while the organic acid mainly refers to organic sulfonic acid, organic phosphorus acid, organic carboxyl acid, urea and the like and solid-carrying organic acid of the organic acid. The invention can be used as organic matters such as amino acid and the like which has double functions of organic acid and base and as catalysts which can be used to solid support the organic acid base on a same carrier. The catalyst of the invention has good catalytic performance and is easy to be separated from reaction systems, ester exchange conditions are temperate, the invention is convenient ...

Method for detecting expression quantity of cone opsin gene of brachymystax lenok tsinlingensis by adopting fluorescent RT-PCR (reverse transcription-polymerase chain reaction) technology

The invention discloses a method for detecting the expression quantity of a brachymystax lenok conopsin gene by adopting a fluorescent RT-PCR (Reverse Transcription-Polymerase Chain Reaction) technology, which is used for detecting the expression quantity of the brachymystax lenok conopsin gene, and has the advantages of simplicity and convenience in operation, avoidance of introduction of other error factors, high result stability, high sensitivity of fluorescent detection, strong specificity and high detection sensitivity. The result is a directly read digitized fluorescence signal and is easy to standardize. According to the method for detecting the expression quantity of the cone opsin gene of the brachymystax lenok tsinlingensis by adopting the fluorescent RT-PCR technology, a foundation is laid for revealing an illumination adaptability mechanism of brachymystax lenok tsinlingensis visual molecule regulation and control, the visual behavior characteristics of brachymystax lenok tsinlingensis ...

Micro-flow accuracy control device

A micro-flow accuracy control device comprises joint components (1), pore plates (2), end cover plates (3) and temperature control components (4), wherein the pore plate (2) are disc-shaped, a plurality of small holes are formed in the surfaces of the discs, and channels are etched among the small holes; the end cover plates (3) are also disc-shaped, small holes are formed in the centers of the end cover plates (3), and the two end cover plates (3) are welded on two sides of the discs of the pore plates (2); the center holes of the end cover plates (3) are communicated with the small holes in the centers of the pore plates (2); from the middle, the small holes in the pore plates (2) are connected in series through the etched channels to be communicated with the small holes in the middle; the two joint components (1) are respectively connected with the two end cover plates (3); the temperature control components (4) comprise a heater and a temperature measuring sensor which are packaged ...

Reinforced composite building material

A reinforced compound construction material takes a solid foam material as the core to wrap it with a reinforcing layer cured by mixed fiber material and adhesive, which utilizes materials with two different properties to form a new reinforcing compound mateial by structural combination of the core and reinforcing layer, not only having the property of the core in flexible, light water-proof, anti-corrosion and heat-isolation features but also strengthening the strength of the structure.

Method for synthesizing kilogram-stage nano molecular screen MCM-56 and template agent removing method

This invention discloses a method for synthesizing kilogram grade nanometer molecular sieve MCM-56, and method for removing metrix agent. The procedures are: mixing silicon source, aluminium source, alkali, metrix agent and water in proper ratio, heating at 80-200deg.C, crystallizing for 5-240hrs; taking the product out and proceeding water-washing, drying to obtain the inventive product MCM-56 molecular sieve. Said crystallization is in a 30L reaction tank and being rotating round a central horizontal axis at speed of 5-40 rpm. Hydrogen peroxide is used for removing metrix agent. In this invention, due to the use of less water and metrix agent to form athick raw material mud, it is beneficial to formation of molecular sieve kernels in great amount. The even heating in the reaction tank makes the final product being of crystalline phase homogeneous. No use of high temperature calcinations makes the skeleton keep its original structure. This inventive method is suitable for commercial production ...

Flue gas waste heat power-generation energy-conservation and dust-removal method for electric furnace with liquid storage tank

Provided is a flue gas waste heat power-generation energy-conservation and dust-removal method for an electric furnace with a liquid storage tank. The method is characterized in that flue gas of the electric furnace is exhausted from the inside of the electric furnace, the flue gas is mixed into cold air through a water-cooled flue gas to enter a settling chamber, the flue gas passing the settling chamber enters a high-temperature dust remover which is a filter element dust remover made of high temperature resistance carbon and copper composite materials, and then enters a thermal storage temperature evening device, after thermal storage and temperature evening are carried out on the flue gas, the flue gas enters a collection chamber and emits heat, the flue gas is pressed into an exhaust funnel through a main fan and exhausted to atmosphere, meanwhile, circulating water flows into a heat exchanger and absorbs the heat of the flue gas, a steam-water mixture is formed and enters an evaporator ...

Coastal engineering silt physical model test bottom bed dynamic and comprehensive observation method

The invention provides a coastal engineering silt physical model test bottom bed dynamic and comprehensive observation method. The method is characterized in that the method is involved in a total station, high-speed cameras, a mini-type soil pressure sensor and pore water pressure sensors, wherein the total station and the high-speed cameras are arranged on the outer side of a silt physical model test water tank and the mini-type soil pressure sensor and the pore water pressure sensors are arranged in a bottom bed in the silt physical model test water tank; the observation method includes a high-speed photographing method, a double-sensor synchronous point detection method and a total station section measurement method, the high-speed photographing method is used for photographing the bottom bed dynamic evolution and the wave time interval change from the glass side wall of the silt physical model test water tank, the double-sensor synchronous point detection method is used for separating ...

Method for detecting Rhodopsin gene expression of brachymystax lenok tsinlingensis

The invention belongs to the technical field of biological fluorescence detection, discloses a method for detecting Rhodopsin gene expression of brachymystax lenok, and designs a real-time quantitative PCR (Polymerase Chain Reaction) detection primer group for Rhodopsin gene expression quantity of brachymystax lenok. Extracting total RNA from a brachymystax lenok tsinlingensis sample to be detected; the method comprises the following steps: synthesizing a cDNA first chain by taking total RNA of a brachymystax lenok sample to be detected as a template; adding a real-time quantitative PCR (Polymerase Chain Reaction) detection primer group for the expression quantity of the Rhodopsin gene of the brachymystax lenok tsinlingensis, and carrying out real-time fluorescent quantitative PCR detection by taking beta-actin as an internal reference; according to a quantitative result of LightCycler 96SW1.1 software, a 2-delta delta Ct method is adopted to calculate the relative expression level of the ...

Organic acid base catalyst for synthesizing aryl ester carboxylic acid by interesterification

The invention belongs to the technical fields of organic chemistry and catalytic chemistry, and relates to an organic acid-base catalyst which is used for carboxylic acid aryl-ester groups which are compounded by ester exchanges. The organic base in the organic acid-base catalyst refers to an organic compound which contains nitrogen, phosphorus and halogen elements and solid-carrying organic base of the organic base, while the organic acid mainly refers to organic sulfonic acid, organic phosphorus acid, organic carboxyl acid, urea and the like and solid-carrying organic acid of the organicacid. The invention can be used as organic matters such as amino acid and the like which has double functions of organic acid and base and as catalysts which can be used to solid support the organic acid base on a same carrier. The catalyst of the invention has good catalytic performance and is easy to be separated from reaction systems, ester exchange conditions are temperate, the invention is convenient ...

Anti-corrosion coating for highway bridge anti-collision guardrail and preparation method of anti-corrosion coating

The invention relates to the field of anti-corrosion coatings, and particularly discloses an anti-corrosion coating for a highway bridge anti-collision guardrail and a preparation method of the anti-corrosion coating. The invention discloses an anticorrosive coating for a highway bridge anti-collision guardrail. The anticorrosive coating is prepared from 2-4 parts of graphene, 1-3 parts of nano silicon, 7-8 parts of polydopamine, 1.5-3 parts of modified cellulose, 2-4 parts of a resin material, 0.5-0.8 part of perfluorotripropylamine, 1 part of a dispersing agent, 2-6 parts of an ionic liquid solvent, 1-3 parts of dioctyl phthalate and the balance of deionized water, wherein the modified cellulose is modified hydrophobic nano cellulose; the preparation method comprises the following steps: enabling graphene and nano silicon to have better dispersibility through ball milling, adding the graphene and nano silicon into a solution which is cooled to room temperature and in which modified nano ...

Bracket riveting equipment for automobile part production

The invention is applicable to the field of riveting, and provides bracket riveting equipment for automobile part production, which comprises a workbench, a mounting frame fixedly connected to the top of the workbench, an extrusion frame slidably connected to the interior of the mounting frame, an extrusion head slidably connected to the interior of the extrusion frame, and a clamping mechanism, the clamping mechanism is connected to the extrusion frame and used for clamping the automobile parts to the workbench. The first motor drives the extrusion frame and the extrusion head to do reciprocating vertical motion, so that continuous operation can be realized, and the riveting working efficiency is improved; according to the automatic riveting device for the automobile parts, the automobile parts are clamped on the workbench firstly, then the extrusion head rivets the automobile parts, the problem that in the riveting process, the riveting quality is reduced due to displacement of the automobile ...

Cs supported pure silicon molecular sieve catalyst, preparation method and applications thereof

The invention discloses a Cs supported pure silicon molecular sieve catalyst, a preparation method and applications thereof. KIT-6 is taken as the carrier, a Cs salt or a mixture made of Cs and modifying elements is loaded on the carrier, and the catalyst is prepared by an impregnation method; wherein the mixture comprises 0.1 to 15 wt% of Cs, and 0 to 2 wt% of modifying elements. The impregnation method is adopted to prepare the catalyst, the technology is simple, and the method can be applied to massive industrial production. The prepared catalyst can be repeatedly used for several times, and moreover the catalyst has the advantages of high catalytic activity, high selectivity, and long service life. The catalyst can be applied to methyl acrylate production in a fixed bed reactor, the conversion rate of methyl acetate is not less than 30%, the selectivity of methyl acrylate is not less than 93%, and the yield of methyl acrylate is not less than 27%.

Processing circuit is gathered to analog quantity

The utility model provides a processing circuit is gathered to analog quantity, including signal amplifier, signal amplifier sets up to LM124J NULL, LM124J NULL is equipped with no. 1 foot 1OUT, no. 2 foot 1IN -, no. 3 foot 1IN+, no. 4 foot VCC, no. 5 foot 2IN -, no. 6 foot 2IN+, no. 7 foot 2OUT, no. 8 foot 3OUT, no. 9 foot 3IN+, no. 10 foot 3IN -, no. 11 foot GND, no. 12 foot 4IN+, no. 13 foot 4IN - and no. 14 foot 4OUT, 1, the small -signal is gathered to the function of this circuit, through gathering the current signal, enlargies the output voltage analog quantity, and the collection of confession system is used. 2, adopt LM124J NULL as signal amplifier, make that the noise is low among the sampling process, the consumption is little, anti -interference strong, and it insidely has four amplifiers simultaneously, therefore signal amplifier can solve the problem, the cost is little.

On-site collection method of karst plateau lake water environment DNA sample

The invention discloses an on-site collection method of a karst plateau lake water environment DNA sample, which comprises the following steps: step 1, a worker needs to wear disposable sterile gloves before sampling, and a water sampler and a plastic barrel are fully rinsed and washed 3-5 times at a sampling point; 2, collecting a water sample by using a water collector, pouring the water sample into a washed plastic barrel, filling 2 L of water into a sterile wide-mouth bottle, and then immediately carrying out low-temperature dark storage treatment; 3, carrying out suction filtration on the water sample by using a diaphragm vacuum pump and a sand core glass filtering device; and 4, after the suction filtration work is completed, enriching the eDNA in the water sample on the filter membrane, rolling up the filter membrane by using tweezers, placing the rolled filter membrane in a sterile centrifugal tube, and storing the rolled filter membrane at-20 DEG C. The invention provides the sampling ...

Flue gas waste heat power-generation energy-conservation and dust-removal method for electric furnace with thermal storage temperature evening device

Provided is a flue gas waste heat power-generation energy-conservation and dust-removal method for an electric furnace with a thermal storage temperature evening device. The method is characterized in that flue gas in the electric furnace is mixed into cold air through a water-cooled sliding sleeve, then enters a settling chamber, the thermal storage temperature evening device and a waste heat exchange chamber and emits heat, the flue gas enters a bag-type dust remover, the flue gas after dust removal is pressed into an exhaust funnel to be exhausted to atmosphere through a main fan, meanwhile, organic working media absorb heat in an evaporator through a working medium pump to become steam, the steam enters a steam drum, working medium steam does work in a steam turbine in an expansion mode and drives a generator to generate electricity, the working medium steam exhausted from a low boiling point working medium steam turbine is condensed to saturated liquid through a condenser to enter ...