70results about How to "Concentration unchanged" patented technology

The invention belongs to recovery treatment on lead plaster of a waste lead-acid storage battery. The method comprises the following steps of: mixing the lead plaster of the waste lead-acid storage battery with waste sulfuric acid in the waste lead-acid storage battery according to the design requirement and roasting; adding roasting sand in a stirring kettle; adding tap water to a water level line of the device and stirring the roasting sand; adding a proper amount of calcium acetate, acetic acid and nitric acid; starting a solution circulating system pump, leaching out the roasting sand and maintaining the concentration of lead acetate to be saturated; adding a proper amount of bone glue and beta-naphthol, electrolyzing immersion liquid, recovering the metallic lead at the cathode and recovering lead dioxide at the anode; press filtering residues to obtain lead-off slag and filtrate; and adding calcium carbonate in the filtrate and recycling. The device mainly comprises a leaching part, a press filtration part, a circulating part and an electrolysis part, and concretely includes eight key components of the stirring kettle, a press filter, an overflow port, an electrolysis direct current power supply, an electrolytic cell, a cathode titanium basket, a corrosion resistant pump and a heating element.

The invention discloses a photoresist removing method which comprises the following steps of providing a sulfuric acid solution; adding hydrogen peroxide into the sulfuric acid solution periodically to form the washing liquid containing the sulfuric acid and the hydrogen peroxide; spraying the washing liquid on the photoresist of a semiconductor substrate to remove the photoresist. The method can prolong the service life of the washing liquid.

The invention discloses an automatic pesticide mixing device for a vehicle-mounted variable spraying machine. According to a set mixing concentration, quantitative clear water and quantitative pesticide concentrated liquid are drawn through a metering pump, the pesticide concentrated liquid and the clear water are sufficiently and uniformly mixed in a mixing tank and transferred into a buffer tank, and needed pesticide liquid is provided for the spraying machine. The liquid level in the buffer tank and the liquid level in the mixing tank are monitored through liquid level sensors in real time, a system determines whether the pesticide liquid needs to be transferred from the mixing tank or pesticide mixing needs to be conducted again according to the information, the buffer tank is supplemented with the pesticide liquid, and the pesticide liquid is provided for the spraying machine for use. The spraying machine conducts variable spraying including massive spraying, less spraying and zero spraying according to target characteristic information detected by a vehicle-mounted sensor, and the concentration of the mixed pesticide liquid is always constant in the process. Through the automatic pesticide mixing device, the concentration of the mixed pesticide liquid is controlled accurately and intelligently, the probability of contact between personnel and pesticides is reduced, pesticide waste is reduced, and development and popularization of the vehicle-mounted pesticide mixing device are accelerated.

The invention relates to an agricultural plant protection unmanned aerial vehicle capable of guaranteeing a pesticide spraying effect. The agricultural plant protection unmanned aerial vehicle capable of guaranteeing the pesticide spraying effect comprises a body, a propeller, a support and a liquid storage box, wherein the body further comprises a stirring mechanism, a cover opening mechanism and a fixing mechanism; the stirring mechanism comprises a tightening and releasing assembly and a stirring assembly; a cover opening mechanism comprises a cylinder and a sealing cover; and the fixing mechanism comprises a third motor, a cylindrical gear, a rack, a fixing plate and a fixing assembly. According to the agricultural plant protection unmanned aerial vehicle capable of guaranteeing the pesticide spraying effect, the liquid storage box is opened by the cover opening mechanism; pesticide in the liquid storage box is stirred efficiently by the stirring mechanism, so that the pesticide cannot precipitate in a spraying process, the concentration of the pesticide is not changed, the pesticide spraying effect is guaranteed, and growth of crops is prevented from being affected; meanwhile, the liquid storage box is fixed on a support by the fixing mechanism, is fixed firmly, and is prevented from injuring people or crops; and when the liquid storage box needs to be taken down, parts do not need to be detached, the liquid storage box can be directly taken down from the support, and the time and labor are saved.

The invention relates to the technical field of environment experiments, and particularly relates to a constant-pressure environment simulating chamber. The constant-pressure environment simulating chamber comprises a chamber body and a pressure balance assembly, wherein the pressure balance assembly is positioned inside the chamber body; an air inlet and a sampling hole are formed in the chamber body; the pressure balance assembly is communicated with the air inlet. Experimental gas is loaded in the chamber body of the constant-pressure environment simulating chamber, the pressure balance assembly is placed in the chamber body and is communicated with the outside atmosphere through the air inlet. As the experiment is in progress, negative pressure is gradually formed in the chamber body when the gas in the chamber body is collected through the sampling hole, at this time, the outside air pressure is greater than the air pressure in the chamber body, the outside air is introduced into the pressure balance assembly inside the chamber body through the air inlet, and the stability of the air pressure in the chamber body is maintained, so that the concentration of the gas in the chamber body is invariable. According to the constant-pressure environment simulating chamber disclosed by the invention, the gas in the chamber body is basically and totally used for analyzing without influencing sampling volume and gas concentration; stable and uniform standard gas can be conveniently prepared; the constant-pressure environment simulating chamber disclosed by the invention can be used for carrying out a gas reaction experiment and detecting release gas of put-in objects.

Disclosed are a device and a method for using a two-stage jet absorption heat pump to improve thermal cycle efficiency. The device comprises a steam condenser, a first evaporator, a first condenser, a first jet pump, a first generator, a first absorber, a second evaporator, a second condenser, a second jet pump, a second generator, a second absorber and a second heat exchanger. One side of the second evaporator is connected with the first absorber. The other side of the second evaporator is connected with an injecting end of the second jet pump and the second heat exchanger respectively through a pipeline. One side of the second condenser is connected with the second generator and the second heat exchanger respectively through a pipeline. The other side of the second condenser is connected with the second absorber and the first condenser respectively through a pipeline. The second generator is connected with a jet outlet end of the second jet pump and the second absorber respectively through a pipeline. The second absorber is connected with an inlet end of the second jet pump through a pipeline provided with a second jet absorbing cycle pump. The invention further discloses the method for using the two-stage jet absorption heat pump to improve thermal cycle efficiency. By the device and the method, thermal cycle efficiency can be better improved.

The invention discloses a precise powder supply device for acceleration dust collection testing of an air conditioner heat exchanger, and relates to the field of dust testing of the air conditioner heat exchanger. The device comprises a dust holding container, a mixed impeller piece, a rotating motor, a micro cylindrical straight cylinder, a flaky switch valve, a dust conveying pipe, a stepper motor, an airflow air guide pipe, an air valve, an air pump, a dust concentrator, a programmable controller and a dust collecting chamber. The rotating motor and the mixed impeller piece are used for preventing dust bonding on the wall surface of the dust holding container; dust of the micro cylindrical straight cylinder is totally conveyed into the dust collecting chamber through a dust blowing module; and based on feedback control, when the concentration of the dust in the dust collecting chamber is reduced to an appointed threshold, the dust is quantitatively fed by using the micro cylindricalstraight cylinder with specific capacity to maintain a dust containing environment with higher, stable and invariable dust concentration in the dust collecting chamber. The device is simple and reliable in standard, high in operability and particularly suitable for micro and precise powder supply places easy to bond with the dust.

The invention relates to nanometal particles and a preparation method thereof. Specifically, the nanometal particles are prepared with the method comprising the following steps: a) providing a solution of a metal precursor; b) providing mother liquor containing a reducing agent; c) atomizing the solution of the metal precursor and enabling the atomized solution of the metal precursor to make contact with the mother liquor; and d) allowing the metal precursor to react with the reducing agent so as to form the nanometal particles, wherein the solubility of the metal precursor in a first solvent is higher than that of the metal precursor in the mother liquor. The preparation method of the nanometal particles has the advantages that equipment is simple, raw materials are easily available, cost is low, conditions are easy to control, yield is high, output is large and the like which are realized with a traditional liquid-phase chemical reduction method, and further, the obtained nanometal particles have very ideal particle size and particle size distribution.

The invention discloses a method used for preparing a gel ball. Preparation is conducted by selecting the following devices: an instillator, a coagulator, classifiers, a crosslinking agent storage, apump and a connection pipe; a solution of a high molecular material (such as sodium alginate, chitosan and gelatin) is added into a solution (such as a calcium chloride solution) containing a crosslinking agent dropwise to make a high molecular compound chain subjected to crosslinking, a compact three-dimensional network structure is formed, and the small gel ball is formed.

The invention aims to provide an experimental device and an experimental method for researching the behavior of boiling bubbles in a pit under severe accidents. The device comprises a glass container,a condensed water tank and a preparation water tank. A top cover is mounted at the upper end of the glass container. A base is mounted at the lower end of the glass container. The top cover is connected with the top of the condensate tank through a first pipeline. The lower portion of the glass container is connected with the bottom of the condensation water tank through a second pipeline, the upper portion of the condensation water tank is connected with the lower portion of the preparation water tank through a third pipeline, spiral coils of the electromagnetic inductor are wound outside the glass container, gaps for shooting are reserved between the spiral coils, and a heater and a stirrer are arranged in the preparation water tank. The decay heat of aerosol in the pit can be visuallysimulated, and the behavior of boiling bubbles in the pit can be deeply studied. The heating boiling behavior of aerosol in the pit can be independently researched, and the boiling behavior of the aerosol in the pit with melt can also be researched at the same time.

The invention belongs to the technical field of water electrolysis apparatus, and more specifically relates to a device used for rapid preparation of hydrogen oxygen mixed gas. The device comprises afoam maker, an electrolytic tank, electrode groups, a gas inlet pipe, and a gas outlet pipe; the gas outlet pipe is arranged on the top of the electrolytic tank; the foam maker and the electrode groups are arranged in the electrolytic tank successively from bottom to top; the top of the foam maker is connected with the gas inlet pipe; an electrolyte is introduced into the electrolytic tank, compressed air is introduced into the electrolytic tank through the gas inlet pipe, or air is introduced into the electrolytic tank using a blower fan, hydrogen oxygen mixed gas obtained via electrolysis isdischarged through the gas outlet pipe. The device is capable of realizing rapid high efficiency electrolysis, and is large in hydrogen oxygen mixed gas yield.

The invention provides a method for making cold coffee and a coffee maker using the method. The method comprises the steps that water with the temperature within the range from 0 DEG C to 25 DEG C issupplied through an electric pump, and the water makes contact with coffee powder in the pressure intensity range from 1.5 bar to 20 bar to extract coffee, so that drinkable cold coffee liquid is obtained. According to the method, the coffee is extracted by using the high-pressure cold water, compared with the existing methods that iced drops are used and coffee is heated and then cooled by addingice, time is saved, the concentration of the coffee is increased, and the taste of the cold coffee is improved. Through the method, an electric-heating pressure coffee maker in the prior art can be improved, the electric-heating pressure coffee maker is made to have the functions of making hot coffee and cold coffee, and more convenience is brought to home application.

The invention discloses a forward osmosis membrane water treatment device, which consists of a stock solution unit, a forward osmosis membrane component and a solution suction unit. In the forward osmosis membrane component, the surface of a mold is of a saw-toothed and wrinkled structure, a solution can form a vortex flow when passing through the forward osmosis membrane component, and the concentration of the solution is kept unchanged, so that the concentration polarization phenomenon of the surface of a membrane is reduced, and meanwhile, pollution to the surface of the membrane is reduced. In the device, a solar cell is adopted as an energy source for a low-power electric pump, so that the device is more environmentally-friendly and energy-saving. The device is easy to disassemble, assemble and use and convenient to carry. High performance of the device can be achieved under the conditions of fieldwork, disaster relief and high-quality water source lacking.

The invention discloses a silicon oxide and titanium oxide composite material and a synthesis method thereof. The composite material takes titanium oxide as a core layer and silicon oxide as a shell layer. The synthesis method comprises the following steps: mixing titanium oxide with an alcohol solvent, adding a buffer solution and a silicon source, stirring, standing, washing, drying, and finallycarrying out a heat treatment to obtain the silicon oxide/titanium oxide composite material. The provided silicon oxide/titanium oxide composite material has a core-shell structure, the shell coatingis stable and not easy to fall off, and the synthesis method is simple and feasible.

The invention discloses a technique for separating and purifying succinic acid from a microbial fermentation liquid by cocrystallization. The method comprises the following steps: adding a proper amount of urea into a pretreated succinic acid fermentation liquid, and carrying out cocrystallization to obtain a succinic acid-urea adduct; and precipitating a sodium succinate solid by utilizing the acid-base neutralization reaction and the property that the sodium succinate is insoluble in alcohols, converting the sodium succinate into succinic acid by using a strongly-acidic cation exchange resin, carrying out reduced pressure evaporation, and drying to obtain the succinic acid of which the purity is greater than 99%. The technique for separating and purifying succinic acid from a microbial fermentation liquid is simple and green, and has the advantages of low production cost, high quality and environment friendliness.

The invention discloses a standard substance for morphological analysis of a trivalent arsenic element and a preparation method of the standard substance. The preparation method comprises the following steps of analyzing the purity of a trivalent arsenic compound in a trivalent arsenic compound raw material by a high resolution mass spectrometry method and an HPLC-ICP-MS (High Performance Liquid Chromatography-Inductively Coupled Plasma-Mass Spectrometry) method; when the trivalent arsenic compound raw material is free of any other arsenic element compound, preparing a trivalent arsenic compound solution, and adding thiourea and ascorbic acid to the trivalent arsenic compound solution to obtain a trivalent arsenic compound pretreatment solution; adding a distilled and purified MOS (Metal Oxide Semiconductor) hydrochloric acid solution to the trivalent arsenic compound pretreatment solution to obtain a trivalent arsenic compound stabilization solution; performing packaging under high-purity nitrogen protection to obtain the standard substance; and performing combined measurement on the concentration of trivalent arsenic in the standard substance. The standard substance is good in stability, meets the morphological analysis of the trivalent arsenic element, and avoids resource waste and environmental pollution caused by discard due to long-term disuse.

The invention discloses a silicon oxide and carbon composite material and a synthesis method thereof. The composite material takes carbon as a core layer and silicon oxide as a shell layer. The synthesis method comprises the following steps: mixing carbon and an alcohol solvent, adding a buffer solution and a silicon source, stirring, standing, washing, drying, and roasting to obtain the silicon oxide/carbon composite material. The silicon oxide/carbon composite material has a core-shell structure, the shell coating is stable and not easy to fall off, and the synthesis method is simple and feasible.

The invention relates to the field of medical appliances and particularly relates to a specimen container for preventing formaldehyde from leaking. The specimen container is communicated with at leastone injection pipeline capable of injecting a formaldehyde solution into a container body, the injection pipeline is internally provided with a limiting ring, the limiting ring is provided with a liquid injection hole for allowing the formaldehyde solution to go through, and an upper tooth group capable of puncturing an aluminum foil film on a bottleneck of a formaldehyde solution bottle is arranged on the upper end face of the limiting ring. Due to the design of the injection pipeline and the limiting ring, the formaldehyde solution poured into the container body avoids volatilizing to endanger the human body, and the concentration of the formaldehyde solution is guaranteed to be not changed.

The invention relates to a method for measuring mercury content by using a gas-phase molecular absorption spectrometer. The method comprises the following steps of diluting a mercury standard stock solution step by step by using a hydrochloric acid solution to prepare a mercury standard working solution; detecting the mercury standard working solution by using a gas-phase molecular absorption spectrometer, and correspondingly drawing a standard curve by using the detection data and the concentration; detecting a to-be-detected water sample by adopting a gas-phase molecular absorption spectrometer, and finding the concentration of mercury according to the drawn standard curve by adopting detection data of the to-be-detected water sample; wherein the gas-phase molecular absorption spectrometer adopts two paths of sample injection, one path of sample injection being a mercury standard working solution or a to-be-detected water sample and a potassium dichromate-hydrochloric acid solution,the other path of sample injection being a KBH4 solution, and the two paths of sample injection being performed at the same time and being mutually converged. Compared with the prior art, the method is advantaged in that the standard solution is very stable and can be stored for a long time, detection sensitivity of the method is high, the determination result is accurate and stable, and operationis convenient.

The invention provides a method for decoloring a methionine crystallization mother liquor by adopting a membrane integration technology. The method comprises the following steps: 1, carrying out ultrafiltration (UF) system treatment on methionine; and 2, carrying out nanofiltration (NF) membrane decoloring purification system treatment, adding pure water to the obtained nanofiltration concentrate, carrying out filter washing, directly conveying the obtained substance to a burning device, burning, and allowing an NF permeation liquid to directly enter a subsequent process. The clean production membrane integration decoloring technology is adopted to substitute active carbon decoloring in order to remove colloids and other pigments in the methionine crystallization mother liquor, so the generation of solid wastes of an enterprise is reduced, and the working environment of a decoloring workshop is improved; and high concentration multiple of the membrane technology is used, so the emission amount of wastewater is reduced, and the running pressure of the wastewater treatment station of the enterprise is reduced.