111results about How to "Guaranteed reaction temperature" patented technology

The invention relates to the technical field of resource and environment, in particular to a supercritical water oxidation system and a starting method thereof. The system comprises a fuel branch, evaporable water branches, a waste liquid branch, an oxygen branch, a water membrane reactor and a mixer; the fuel branch and the waste liquid branch are respectively connected to the mixer, and the mixer is connected with a raw material inlet of the water membrane reactor; the evaporable water branches are respectively connected to a raw material inlet and a side wall surface of the water membrane reactor, and the oxygen branch is connected with an oxygen inlet of the water membrane reactor. The supercritical water oxidation system adopts the fuel as a starting simulation material to start the supercritical water oxidation reaction of the simulation material, thereby achieving an effect for warming a furnace; then the real waste liquid is gradually used to substitute the fuel, so that the waste liquid can be directly injected into the reactor without being preheated.

The invention relates to a multistage oxidation-membrane separation collaborative water treatment system and a process for a light-sound-electricity coupled energy field. The multistage oxidation-membrane separation collaborative water treatment system comprises three parts, namely a light-sound-electricity coupled energy field multistage oxidation unit, a dual-membrane separation unit and a disinfection and sterilization unit, wherein the light-sound-electricity coupled energy field multistage oxidation unit comprises a light-sound-electricity coupled energy field multistage oxidation reactorprovided with a light-sound ozone joint oxidation reaction zone and an electrochemical oxidation adsorption reaction zone; the dual-membrane separation unit consists of a first-stage nano-composite ultrafiltration membrane and a second-stage nano-composite ultrafiltration membrane; the disinfection and sterilization unit adopts an ultraviolet sterilizer. By using a coupling synergistic effect among an ozone oxidation technology, an ultraviolet photoxidation technology, an ultrasonic oxidation technology, an activated carbon adsorption technology, an electrochemical oxidation technology, a membrane separation technology and the like, the multistage oxidation-membrane separation collaborative water treatment system is efficiently integrated to form an integral inseparable reaction system ofwhich all parts are synergized; the multistage oxidation-membrane separation collaborative water treatment system can be used for carrying out multistage oxidation and degradation on organic pollutants in a water body and then separating and removing the organic pollutants, and effectively removing organic salts, in particular to high valence salt ions.

The invention provides a method for synthesizing 3-fluoro-4-(4-morpholinyl)aniline by using a micro-channel reactor. The micro-channel reactor comprises a preheating module group composed of one or more parallely-connected preheating modules and a reaction module group composed of one or more tandemly-connected reaction modules, wherein the preheating module group is series connection with the reaction module group. The method comprises the following steps: separately preheating difluorobenzene, concentrated nitric acid and concentrated sulfuric acid, then subjecting the preheated difluorobenzene, concentrated nitric acid and concentrated sulfuric acid to a reaction in the reaction module group and carrying out treatment so as to obtain 3,4-difluoronitrobenzene; dissolving 3,4-difluoronitrobenzene in an organic solvent, adding organic base, dissolving morpholine in the organic solvent, carrying out preheating, allowing the obtained solution to enter the reaction module group for a reaction and carrying out treatment so as to obtain 4-(2-fluoro-4-nitrophenyl)morpholine; and dissolving 4-(2-fluoro-4-nitrophenyl)morpholine in ethyl acetate, adding a catalyst, carrying out preheating, allowing the obtained solution and hydrogen to enter the reaction module group for a reaction and carrying out treatment so as to obtain 3-fluoro-4-(4-morpholinyl)aniline. The method has the advantages of low energy consumption, high yield, high product purity, safety, flexibility, etc.

The invention relates to a preparation method of halohydrocarbon-free alpha-cyanoacrylate, which comprises the following steps: mixing cyanoacetate and methyl carbonate in a reaction kettle, simultaneously mixing formaldehyde and a base catalyst in a charging hopper, then adding the mixture of the formaldehyde and the base catalyst to the reaction kettle at twice, performing a refluxing and condensation reaction at 78 DEG C under normal pressure, adding a dehydration solvent methyl carbonate to dehydrolyze after the condensation reaction is finished, adding an anionic polymerization inhibitor phosphorus pentoxide and a free radical polymerization inhibitor, and depolymerizing and distilling at 155-210 DEG C at a vacuum degree of 0.5-30 mmHg to obtain an alpha-cyanoacrylate coarse monomer; and rectifying the coarse monomer to obtain a high-purity alpha-cyanoacrylate refined monomer, wherein the yield of the alpha-cyanoacrylate refined monomer is more than 75%, and the purity of the alpha-cyanoacrylate refined monomer is 99%. The invention has the advantages of no pollution, energy conservation and high yield and high purity of the obtained product, and is stable in reaction, thereby being suitable for popularization and application.

The invention relates to a method for purifying a diamond or cubic boron nitride abrasive. The method comprises the following steps: adding sodium hydroxide and potassium hydroxide to diamond or cubic boron nitride containing pyrophyllite silicate, hexagonal boron nitride and silicon oxide; stirring the sodium hydroxide and the potassium hydroxide as well as the diamond or cubic boron nitride for reaction; controlling an internal temperature at 130-150 DEG C and controlling an external temperature range at 240-250 DEG C; 2-4 hours later, closing a heating system; and discharging a product through a discharging product. Through the adoption of the method provided by the invention, product quality is absolutely guaranteed; in addition, uniformity is kept in stirring; a fact that purity reaches reaches requirements of purifying reaction consistency is guaranteed; impurities and incomplete reaction phenomenon are avoided; the sodium hydroxide and the potassium hydroxide are saved by 70 % according to process statistics; the comprehensive cost is reduced by 50 %; and very good promotion and application values are obtained.

A water-cooling-type tail gas cleanup device of an explosion-proof diesel engine is provided with a front flange, a rear flange, a shell and a DOC core. The front flange is fixed to the front end of a main body shell, a thermal-insulation flange is arranged in the front flange, the rear half portion of the front flange is connected with a flow guide cover, the rear of the flow guide cover goes deep into the main body shell, a front space ring and a rear space ring are arranged on the inner wall of the middle of the main body shell, the DOC core is clamped between the front space ring and the rear space ring, an annular area outside the cylindrical surface of the DOC core between the front space ring and the rear space ring is an air isolation area, an inner shell of a lower shell extends upwards to form a flow guide pipe, an air outlet hole is formed in the cylindrical surface, facing the wall of a hemispheroid cavity, of the flow guide pipe, and the rear flange is installed at the lower end of the lower shell. Through the water-cooling-type tail gas cleanup device, not only is the surface temperature of the diesel engine made to reach the standards, but also high conversion efficiency of the DOC core can be guaranteed.

The invention discloses a clean production technology of two-step isolation type totally chlorine-free and whole cotton stalk bleaching pulp, which has the advantages of simplifying the process, saving cost, reducing pollution, saving energy and the like. The clean production technology comprises the following steps of: 1) material preparation: the whole cotton stalk plant material is treated with cotton-shell removal, leave removal and cutting-off; 2) steaming and water washing; 3) discongesting: the whole cotton stalk material is sent to a compressing and discongesting machine for compression and discongesting; 4) first-step dipping: a one-step bleaching solution is used for dipping the whole cotton stalk material released from the compressing and discongesting machine, and the dipping is maintained; 5) first-step bleaching: the dipped whole cotton stalk material is heated and bleached; 6) jordaning of a first stage: the bleached whole cotton stalk material is ground into unscreened stock by a pulping machine; 7) second-step dipping: the unscreened stock ground by the pulping machine is dipped by using a second-step bleaching solution; 8) second-step bleaching: the unscreened stock treated with second-step dipping is heated and bleached; 9) jordaning of a second stage: the unscreened stock treated with second-step bleaching is ground and dissolved into water pulp; 10) pulp washing and pulp shoving; and 11) stock screening and pulp forming.

The invention belongs to the technical field of urea-formaldehyde resin preparation, and particularly relates to a preparation method of a nano silicon dioxide/rosin modified urea-formaldehyde resin. The method comprises the following steps: preparing a urea-formaldehyde resin from urea and formaldehyde by a weak alkali-weak acid-weak alkali technique, and modifying with nano silicon dioxide and rosin to obtain the nano silicon dioxide/rosin modified urea-formaldehyde resin. The method has the advantages of simple technique and accessible raw materials, and is suitable for industrialized mass production. The prepared urea-formaldehyde resin has the advantages of favorable viscosity, high softening point, low free formaldehyde content, environment friendliness, higher water resistance, favorable toughness and improved aging resistance, is suitable for artificial board production, and can be used as an adhesive in material binding, bamboo/wood processing, paper binding, steel paints, multicolor pattern paints and other industries.

The present invention provides a new method for preparing o-nitro anisole by using a micro-channel reactor, particularly application of a micro-channel reactor with an enhanced mass transfer unit structure to carry out a continuous flow o-nitro chloro benzene etherification reaction. According to the present invention, the mass transfer and the heat transfer can be completed dependent on the kinetic energy of the fluid without the mechanical stirring process under the reactor operation condition higher than the normal temperature, the space time reaction rate of the micro-channel reactor can be substantially improved, the temperature fluctuation and the concentration fluctuation during the reaction process can be avoided, the phenomena such as temperature runaway and overheating do not exist, and the reaction process is safe.

The invention relates to a magnetic covalent triazine framework material, and a preparation method and an application thereof. The magnetic covalent triazine framework material comprises a covalent triazine framework and Fe3O4. The magnetic covalent triazine framework material of the invention is magnetic, is convenient to recycle, can be used in wastewater treatment, and also can be used in the degradation of antibiotics as a catalyst. The preparation method of the invention is characterized in that terephthalonitrile is rapidly condensed with microwaves as a heat source and Fe3O4 as a microwave absorption and transmission medium. The presence of the Fe3O4 makes a powder aggregate in the reaction process in order to make the powder not prone to fly over, so the reaction is complete.

The invention relates to a device and a method for detecting pesticide residue and nitrite based on a scanning code type paper chip by adopting a microfluidic technology and an image processing technology to identify, detect and record the pesticide residue and nitrite harmful substances. The method includes, arranging a plurality of layers of microfluidic paper chips inside a heating chip detection cavity, wherein a plurality of layers of the microfluidic paper chips consist of five layers which are glued together from top to bottom, each layer has a chip bar code detection areal adding, by adropper, mixed liquid into a chip sample inlet drop by drop; showing, by the chip bar code detection area of each layer, different colors according to a composition of the sample mixed liquid; imaging and scanning, by intelligent mobile equipment, a color development result of a plurality of layers of the microfluidic paper chips to obtain a detection result. The method applies an inhibition principle of organophosphorus pesticides on acetylcholine esterase and a diazonium coupling reaction of aminobenzenesulfonic acid and N-1-naphthylethylenediamine dihydrochloride under an acidic condition,and integrates automatic sample introduction, intelligent heating, reaction, color development and result analysis, recording and processing.

The invention relates to a method for preparing food-grade xylose by utilizing waste liquid generated in a production process of viscose staple fibers. The method comprises the following steps: carrying out optimized combination on the waste liquid generated by a squeezing procedure in a viscose staple fiber production process through utilizing a series connection type nanofiltration membrane and electrodialysis; hydrolyzing, neutralizing and de-coloring, carrying out ion exchange, carrying out membrane concentration, evaporating, crystallizing and drying to obtain a xylose finished product. According to the method provided by the invention, the food-grade xylose is prepared by taking hemicellulose in the waste liquid generated in a viscose production process, and the problem that a lot of waste liquid containing the hemicellulose in the viscose production process cannot be treated effectively prior to discharge, so that social environmental pollution is caused is solved; the hemicellulose in the waste liquid is used as a raw material for producing the xylose, and a new way is provided for sources of the raw materials of the xylose.

The invention discloses a high-temperature and high-pressure reaction kettle with an online sampling device. The high-temperature and high-pressure reaction kettle comprises a main shell and a reaction cavity formed in the main shell. An operation table is fixedly arranged on the end wall of the lower side of the reaction cavity. A movable door is arranged in the end wall of the front side of thereaction cavity. A driving mechanism with a power motor as a main body is arranged in the main shell. The pressurizing device in the reaction cavity is driven by the driving mechanism to move downwards, and a gate between the cooling device and the reaction cavity is opened when the pressurizing device presses downwards, so that the internal space of the reaction cavity is compressed and cooling is carried out; when the temperature in the reaction cavity reaches a preset value, the pressure in the reaction cavity is further finely adjusted through a cam device. The device is simple in structure; through a compact transmission relationship, the cooling and pressurizing processes of the reaction cavity are completed; in addition, the well-designed sealing structure ensures that the temperature and the pressure intensity of the reaction cavity are not changed within a long time.

The invention relates to a boiler denitration process taking ammonia-containing waste gas as a denitration agent. The boiler denitration process includes the steps: generating raw process gas by a gasification furnace; enabling the raw process gas to enter a carbon washing tower and then enter a conversion furnace; enabling the raw process gas to enter an ammonia washing tower through a heat exchange system; forming ammonia-containing washing water in the ammonia washing tower; enabling the ammonia-containing washing water to enter a stripping tower; forming the ammonia-containing waste gas after stripping in the stripping tower; enabling the ammonia-containing waste gas to enter a waste gas mixer; mixing the ammonia-containing waste gas with secondary air of a boiler; enabling the mixed gas to enter the boiler through a boiler air supply system to perform denitration reaction; exhausting the denitrified boiler waste gas from a chimney through an induced draft fan. The ammonia-containing waste gas serves as the denitration agent, resources are utilized, waste gas emission pollution is decreased, and flue gas denitration cost is remarkably reduced. In the denitration process, compared with traditional SNCR (selective non-catalytic reduction) denitration, the denitration process has the advantages that liquid water vaporization latent heat consumption and heat waste are decreased, and nitric oxide emission concentration is lower than 100mg/m<3>.

The invention relates to a method for harmlessly treating electroplating sludge. The method comprises the following steps that the electroplating sludge, a reducing agent and quartz sand are proportioned according to a certain ratio, and mixing and granulating are carried out in a granulator to obtain a furnace-in material; and the furnace-in material is added into a smelting furnace, natural gasand oxygen are introduced, reducing atmosphere is controlled to carry out reduction smelting, and glassy-state smelting slag and alloy are obtained. According to the method, the obtained smelting slagis no longer hazardous waste with leaching toxicity characteristics, and can be used as a building material and the like; and the alloy is further separated and purified, valuable metal in the electroplating sludge can be efficiently recovered through reduction smelting, the recovery rate of copper and nickel can reach 90% or above, the valuable metal is good in recovery benefit, low in labor intensity, short in treatment time, friendly in operation environment, and mature and reliable in process.

The invention discloses an SCR thermal management system based on a 48V micro hybrid power system and an energy-saving priority control method thereof. The SCR thermal management system comprises a vehicle control unit connected with a battery with 48V voltage, wherein the vehicle control unit is used for evaluating the condition of a vehicle, calculating the energy required for driving, distributing the energy of the battery and issuing a work instruction; the vehicle control unit is electrically connected with an SCR post-processing device control unit; and the SCR post-processing control unit controls the start or stop of heating elements in the SCR post-processing device according to the work instruction. Based on the SCR thermal management system, the energy of the battery is effectively distributed according to the energy required by the vehicle to ensure the service life of the battery, and a power system of the vehicle and SCR heating can both obtain the required energy and make full use of electric energy so that the economy of the whole vehicle can be guaranteed, the reaction temperature of the SCR post-processing device is guaranteed, and the treatment effect is improved. In addition, the crystallization risk of the SCR post-processing device is eliminated, and the use effect of the SCR post-processing device is guaranteed.

The invention provides a sample-residue-free heat-insulating reusable multifunctional cell counting and imaging device which comprises a first substrate and a second substrate which can be matched with each other to form at least one micro-channel, wherein the first substrate and the second substrate are respectively provided with a first flow channel wall and a second flow channel wall which are matched with each other to form the at least one micro flow channel, the first flow channel wall and the second flow channel wall being respectively provided with a super-hydrophobic/hydrophobic thermal insulation material layer or formed by super-hydrophobic/hydrophobic thermal insulation materials, or the hydrophobic thermal insulation material is formed in the first substrate material and the second substrate material around the first flow channel wall and the second flow channel wall. Heat insulation detection and residue-free export of the sample are realized, so that the optical detection device is convenient to position under multiple visual angles; when an inlet heating device and an infrared temperature measurement interface are introduced into the device, the temperature control function of the reagent and the sample can be realized; and convenient material setting and specific reaction conditions are provided for various micro-channel biochemical experiment requirements.

The invention discloses a method and a system for double-heating SCR denitration of sintering flue gas. The method comprises the following steps: desulfurizing the sintering flue gas, and mixing the desulfurized sintering flue gas with high-temperature flue gas for the first time; then allowing mixed flue gas to exchange heat with denitrated flue gas; mixing heat-exchanged flue gas with the high-temperature flue gas for the second time, and carrying out denitration; and subjecting the denitrated flue gas to heat exchange, and carrying out discharging. The method provided by the invention mainly solves the problem of GGH blockage after heating in medium-and-low-temperature SCR denitration; after desulfurization is completed, the denitrated flue gas is mixed and heated with the high-temperature flue gas for the first time, so wet flue gas is guaranteed to be changed from an unsaturated state to an overheated state, and the blockage probability of a heat exchanger is reduced; and secondary mixing and heating are carried out before the denitrated flue gas enters an SCR denitration reactor, so the reaction temperature of a catalyst is guaranteed, and the denitration efficiency is improved.