123results about "PH-change processes" patented technology

The embodiment of the invention provides a hydrochloric acid PH control device in a germanium oxide production process and a control method thereof, and belongs to the field of chemical process automatic control. The device comprises an acid liquor storage tank used for storing raw liquor hydrochloric acid and connected to an acid mixing tank through a raw acid feeding control valve; the acid mixing tank is used for mixing an acid solution with a diluent and is connected to the pH regulation reaction tank through a mixed acid feeding control valve; the alkali liquor storage tank is connected to the pH regulation reaction tank through an alkali liquor adding control valve; the pH regulation reaction tank is used for receiving the mixed acid liquor and the alkali liquor and regulating the pH value of a reaction system, and is provided with a pH sensor for detecting the pH value in real time; and the control unit is used for dynamically adjusting the opening degree of each valve by adopting an improved fuzzy self-adaptive PID control algorithm according to a detection result of the pH sensor so as to control the pH value to be within a target range. According to the scheme, the problems of overshoot and lag caused by traditional fixed parameter PID adjustment are solved, and therefore the stability of the pH value of the solution and the consistency of the technology in the germanium oxide production process are guaranteed.

The invention provides a fluopicolide preparation method and a fluopicolide preparation device, and relates to the technical field of pesticide bactericide production. A first feeding pipe and a second feeding pipe are mounted at the left end of the first reaction tank, and the right end of the first reaction tank is connected with a second reaction tank through a first discharging pipe; raw materials participating in the reaction are cheap and easy to obtain, the product quality and yield stability are high, the reaction conditions are mild, and the device and the preparation method are suitable for large-scale production in workshops; when the device discharges, powder adhered to the inner wall of the drying tank is automatically scraped and cleaned, so that the device has better cleaning and using effects and better maintenance efficiency; the problems that multiple chemical substances need to be introduced to participate in the reaction, the reaction process is complex, later impurity removal and purification are not facilitated, the production cost is relatively high, the reaction speed is slow, the reaction effect is poor, and the device and the preparation method are not suitable for large-scale production in workshops are solved.

The invention belongs to the technical field of drilling fluid processing, and particularly relates to a special silicate water-based drilling fluid for a coal-bed gas well as well as a processing method and a processing device of the special silicate water-based drilling fluid. The top end of the stirring tank is communicated with a first feeding hole and a second feeding hole, and the bottom end of the stirring tank is communicated with a discharging pipe; a rotating shaft is rotationally connected to the top surface of the inner wall of the stirring tank, and a sliding groove is formed in the bottom surface of the rotating shaft; a rotating shaft is driven by a first motor to rotate, and the rotating shaft drives a connecting shaft to rotate, so that fresh water and additives in a stirring tank are stirred and mixed by stirring blades, and a first screw rod can be driven by the first motor to positively and negatively rotate in a reciprocating manner in the mixing process; the first screw rod drives the connecting shaft to move up and down in the sliding groove, so that the stirring blades move up and down, the stirring blades stir and mix the water and the additive while moving, and the mixing efficiency and uniformity of the additive and the water are improved.

The system comprises a first reaction unit and a second reaction unit which are connected in series, and the second reaction unit comprises an alkali dissolution device and an acid extraction device which are connected in series; in the first reaction unit, nitric acid oxidizes lignite to generate fulvic acid, and a separated solid phase sequentially passes through an alkali dissolution device and an acid extraction device to obtain humic acid; the system further comprises a tail gas buffering device, the tail gas buffering device is connected with the first reaction unit and the acid extraction device, and NOx generated by the first reaction unit enters the acid extraction device through the tail gas buffering device. According to the system for co-producing the fulvic acid and the humic acid, the fulvic acid and the humic acid are obtained through one-step activation reaction, and co-production is achieved by separating reaction products; nOx generated by activation reaction is introduced into the acid extraction device, so that the pH value in the acid extraction device is 1-2, ulmic acid and humic acid are extracted, and the product precision is improved.

A method and system for converting copper cyanide to copper oxide is provided. The method includes contacting a copper cyanide solution with an acidic solution in a precipitation tank under reaction conditions sufficient to produce a copper cyanide slurry, removing the copper cyanide slurry from the precipitation tank, separating solid copper cyanide from the copper cyanide slurry in a first separation device, removing the solid copper cyanide from the first separation device, contacting the solid copper cyanide with a sodium hydroxide solution in a production tank under reaction conditions sufficient to produce a copper oxide slurry, removing the copper oxide slurry from the production tank, separating solid copper oxide from the copper oxide slurry in a second separation device, and removing from the second separation device any residual sodium hydroxide not reacted during the process of contacting the solid copper cyanide with the sodium hydroxide solution in the production tank.

The invention relates to the technical field of nickel metal preparation, and particularly discloses an electrolytic nickel purification and impurity removal reactor which comprises a reaction precipitation unit and a resin adsorption unit, the reaction precipitation unit comprises a reaction tank, a stirring ventilation mechanism is rotationally arranged in the reaction tank, and an adjusting liquid dropwise adding assembly is arranged above the stirring ventilation mechanism; a conveying belt parallel to the bottom wall of the reaction tank and a driving roller for driving the conveying belt are arranged below the stirring ventilation mechanism, a plurality of scrapers are arranged on the outer surface of the conveying belt, and the scrapers below the conveying belt are in contact with the bottom wall of the reaction tank; an impurity collecting tank extending downwards is arranged on one side of the lower end of the reaction tank, and a tank sealing plate is movably arranged at an opening in the upper end of the impurity collecting tank; according to the electrolytic nickel purification and impurity removal reactor disclosed by the invention, different sediments can be discharged and collected in batches, so that various different sediments can be effectively separated, and the condition that an outlet is blocked due to the fact that all the sediments are intensively discharged at a time is avoided.

The application belongs to the technical field of wastewater treatment, and particularly relates to a polymerization reaction device for producing polyaluminum sulfate flocculant and a production method, which comprises a base, a reaction kettle, a mixing structure and a scraping assembly. The reaction kettle is formed by combining an upper tank body and a lower tank body. An exhaust pipe is fixed to the top of the upper tank body. A feed pipe is symmetrically fixed to the upper part of the side of the lower tank body. The mixing structure is arranged in the middle of the reaction kettle. The mixing structure is rotatably installed below the middle of the upper tank body. The mixing structure comprises a driving shaft, and the side of the driving shaft is uniformly provided with stirring rods. A motor for driving the mixing structure to rotate is fixed to the top of the upper tank body. The scraping assembly is installed on the driving shaft. The scraping assembly is driven to rotate by the driving shaft to clean the foam on the top of the mixed solution in the reaction kettle. The foam on the surface of the mixed solution is cleaned by the scraping assembly, so that the gas generated in the reaction process is smoothly discharged upwards from the inside of the solution, and the reaction is stably carried out.

The invention belongs to the technical field of nano materials, and provides a method and heating control equipment for in-situ polymerization of a nano SiO2 nylon 1010 composite material, and the method comprises the following steps: S1, preparation of nylon salt, S2, preparation of a nano SiO2 / nylon 1010 composite molten material, and S3, preparation of composite material particles. And S2, adding the nylon salt containing 10-15% of ethanol, other ingredients and nano S O2 into a polymerization kettle according to a certain proportion in the process of S2, vacuumizing, performing nitrogen protection, pressurizing and heating until the nylon salt begins to melt, performing pressure-maintaining heating, dehydrating to normal pressure, and emptying. In the S1 process, heating control equipment is adopted to integrate the functions of a dissolving kettle and a neutralizing kettle, and a wall sleeve design with better heat exchange performance, a stirring device design and the like are provided. According to the invention, the mechanical property of nylon 1010 is improved, the space utilization rate of a workshop can be improved through the heating control equipment, the preparation efficiency of nylon salt is improved, and the preparation efficiency of a composite material is further improved.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a polymerization reaction device for producing a polyaluminum sulfate flocculant and a production method. The reaction kettle is formed by combining an upper tank body and a lower tank body, an exhaust pipe is fixed to the top of the upper tank body, and feeding pipes are symmetrically fixed to the side edges of the upper portion of the lower tank body; the mixing structure is arranged in the middle of the reaction kettle, the mixing structure is rotatably mounted below the middle of the upper tank body, the mixing structure comprises a driving shaft, stirring rods are uniformly distributed on the side edge of the driving shaft, and a motor for driving the mixing structure to rotate is fixed at the top of the upper tank body; the scraping assembly is mounted on the driving shaft, and the scraping assembly is driven by the driving shaft to rotate so as to clean foam at the top of the mixed solution in the reaction kettle; the foam on the surface of the mixed solution is cleaned by arranging the scraping assembly, so that gas generated in the reaction process is smoothly discharged upwards from the interior of the solution, and the reaction is promoted to be stably carried out.

The present invention describes an integrated system, apparatus and method for de- alkalizing lignocellulosic material and producing bioproducts. Particularly, the system produces de-alkalized lignocellulosic feedstock which can be used in various downstream bioproducts, such as formation of biofuel, biogas and biochemicals. Among others, the system comprises a slurry-making subsystem for combining lignocellulosic pre-treated particles with a water mixture comprise of water and a chemical agent to obtain a slurry; an ultrasonic treatment subsystem for the disruption of cellular structures, loosening of lignocellulosic matrix, removing and neutralizing alkali at the cellular level of the lignocellulosic material in the slurry; a hydrodynamic cavitation subsystem for high-shear mechanical breakdown of the lignocellulosic material at the cellular level in the slurry; and a direct steam injection subsystem in connection with the slurry-making subsystem and / or the hydrodynamic cavitation subsystem to achieve hydrostatic cavitation and alkali neutralization in the slurry.

The invention relates to the technical field of polyester material production, and discloses a polymerization method and system for producing chinlon 6 slices, and the provided chinlon 6 slices have the advantages of higher relative viscosity, narrower molecular weight distribution, lower water content, and higher yield. According to the system used by the invention, a ZnO / Al2O3 composite variable active catalyst adding window is directly arranged at the bottom of the melting and mixing unit 1, so that the ZnO / Al2O3 composite variable active catalyst can be ensured to be more uniformly dispersed in the whole reaction system, the reaction conditions are optimized, the variable active catalyst is adopted, the pH is dynamically regulated and controlled, and the reaction efficiency is improved. The exposure degree of active sites of the catalyst can be accurately adjusted according to the requirements of different stages of a polymerization reaction, generation of cyclic dimers in the caprolactam hydrolysis ring-opening process is effectively inhibited in the pre-polymerization stage, the content of cyclic by-products is remarkably reduced to 3.5% or below, the monomer utilization rate is increased, increase of the molecular weight is promoted in the post-polymerization stage, and the yield of the catalyst is increased. And product quality.

The invention discloses a method for efficiently recycling ammonium sulfate in electrolytic manganese residues. The method comprises the following steps that firstly, 0.5-1.5 parts of the electrolytic manganese residues and 2-4 parts of clear water are taken and put into a stirring machine to be fully and evenly stirred; 2, adding an acidic reagent into the slurry obtained in the step 1 after fully and uniformly stirring, adjusting the pH value, and then continuously stirring to obtain slurry; 3, the slurry obtained in the step 2 is pumped into a filter press for solid-liquid separation, filtrate and filter residues are obtained, and the filtrate is collected for standby application; 4, the filtrate in the step 3 is returned to the step 1 to replace 2-4 parts of clear water, and then 0.5-1.5 parts of electrolytic manganese residues are taken and put into a stirrer to be fully and evenly stirred; 5, repeating the step 2 and the step 3 on the slurry in the step 4 to obtain filtrate for later use; the invention aims to solve the problems that the electrolytic manganese residue recovery device in the prior art needs to be washed for multiple times, the water consumption is large, other impurities are always remained in water after washing, and the subsequent treatment difficulty is increased.

A method and system for converting copper cyanide to copper oxide is provided. The method includes contacting a copper cyanide solution with an acidic solution in a precipitation tank under reaction conditions sufficient to produce a copper cyanide slurry, removing the copper cyanide slurry from the precipitation tank, separating solid copper cyanide from the copper cyanide slurry in a first separation device, removing the solid copper cyanide from the first separation device, contacting the solid copper cyanide with a sodium hydroxide solution in a production tank under reaction conditions sufficient to produce a copper oxide slurry, removing the copper oxide slurry from the production tank, separating solid copper oxide from the copper oxide slurry in a second separation device, and removing from the second separation device any residual sodium hydroxide not reacted during the process of contacting the solid copper cyanide with the sodium hydroxide solution in the production tank.

The disclosure aims to provide a basic subcritical water composition and a water-containing composition each capable of decomposing, for example, polymers while preventing or reducing corrosion of the reaction device, and a device and a container therefor. The disclosure relates to a basic subcritical water composition having a pH of 13.7 or lower and a potential of 400 mV or higher at a current density exceeding 10 mA / cm2 in an anodic polarization curve obtained using a steel material as a working electrode.

The invention relates to a bicarbonate production system and a bicarbonate production method. The bicarbonate production system according to the present disclosure comprises: a removal device that removes an acidic substance in a first exhaust gas to produce a second exhaust gas; a bicarbonate production device that produces bicarbonate by reacting carbon dioxide in at least one of the first exhaust gas and the second exhaust gas with an alkaline earth compound in the reaction solution; and a pH sensor that detects the pH of the reaction solution. The introduction amount of the first exhaust gas and the introduction amount of the second exhaust gas to be introduced into the bicarbonate production apparatus are controlled so that the pH of the reaction solution detected by the pH sensor is maintained within a predetermined target pH range.

A hydrogencarbonate generation system according to the present disclosure includes a removing device that removes acidic substances in a first exhaust gas to generate a second exhaust gas, a hydrogencarbonate producing device that reacts carbon dioxide in at least one of the first exhaust gas and the second exhaust gas with an alkaline earth compound in a reaction solution to produce hydrogencarbonate, and a pH sensor that detects the pH of the reaction solution. An introduction amount of the first exhaust gas and an introduction amount of the second exhaust gas that are to be introduced into the hydrogencarbonate producing device are controlled to maintain the pH of the reaction solution detected by the pH sensor within a predetermined target pH range.

This invention provides a production process for manufacturing metallic magnesium and industrial silicon by decomposing serpentine using the hydrochloric acid method. [Solution] The present invention provides a method for processing serpentine ore as a raw material using a two-stage countercurrent hydrochloric acid leaching process. The wet process steps include storage and filtration of the slurry after ore dressing, two-stage hydrochloric acid leaching under atmospheric pressure, washing and filtration of the silicon slag after leaching, removal of iron and nickel precipitation from the leaching solution, separation, washing and filtration of the obtained iron hydroxide and nickel hydroxide, crystallization and evaporation of the magnesium chloride solution, and production of hydrochloric acid using the gas generated after the thermal decomposition of magnesium chloride. The present invention has developed a serpentine decomposition technology using hydrochloric acid, a metallic magnesium production process using a drying-electrolytic method, and a process for producing industrial silicon by smelting silicon slag in an electric furnace.

The invention provides a double-shaft stirrer for waste sulfuric acid treatment, the double-shaft stirrer comprises a cylinder body, stirring pieces, pushing wheels, a driving piece, a heat dissipation piece and an exhaust piece, the stirring pieces are oppositely arranged in the cylinder body and used for stirring materials, the pushing wheels are arranged in pairs and oppositely distributed at the two ends of the stirring pieces, and the driving piece is used for driving the pushing wheels to rotate. The outer edge of the material pushing wheel is in contact with the inner wall of the barrel, the material pushing wheel is used for pushing materials to one side and enabling a stirring area space to be in a relatively sealed state, and the driving part is arranged at the end of the barrel and used for driving the stirring part and the material pushing wheel to rotate. The heat dissipation piece covers the outer side of the middle of the barrel and is used for cooling, and the exhaust piece is arranged at the top in the barrel and is used for exhausting gas produced by reaction. The stirring blades capable of stirring and pushing materials to advance are matched with the material pushing wheels for relay discharging, so that the technical effects of ensuring the working efficiency and reducing the working intensity are achieved.

The reaction of sodium hypochlorite with sodium bromide is slow, and commonly only part of the bromide is converted to hypobromite. Methods to accelerate the reaction by adding a regulated amount of acid to a solution comprising bleach and bromide are provided, whereby the yield of hypobromite can be increased. The amount of acid added can be predetermined based on the content of a base in the bleach, and acid can be added to neutralize the base. The amount of acid added can be based on a measured parameter of the reaction that is indicative of reaction kinetics. For example, the amount of acid can be actively controlled by measuring pH, absorbance of visible or near Ultraviolet light, or temperature of the reacting solution and adjusting acid.

The invention provides a phosphorus recovery processing system and a recovery processing method thereof. During recovery processing, cooling equipment is communicated with a growth chamber of molecular beam epitaxy equipment, so that the pressure of the cooling equipment is lower than atmospheric pressure, and a phosphorus material in the growth chamber is driven into the cooling equipment through baking; isolating the growth chamber from the cooling equipment, introducing heated nitrogen into the cooling equipment, purging phosphorus-containing gas in the cooling equipment, and discharging the phosphorus-containing gas outwards; phosphorus-containing gas is conveyed to a first treatment main body of the treatment equipment and is subjected to cooling, hydrogen peroxide treatment, copper sulfate treatment, potassium permanganate treatment and inspection treatment in sequence, and finally waste liquid is discharged to a first neutralizing tank for alkaline neutralization treatment. Through the configuration, the safety and the treatment efficiency of phosphorus recovery treatment are remarkably improved.

The invention provides an optimized method for recovering high-purity lithium carbonate from lithium-containing composite oxides, such as lithium silicate, lithium aluminum oxide, lithium aluminum silicate and the like, which are deposited on an erosion surface of a waste sagger. The invention provides an optimized method for recovering high-purity lithium carbonate from the lithium-containing composite oxides, such as lithium silicate, lithium aluminum oxide, lithium aluminum silicate and the like. Therefore, it is expected that the method for preparing the high-purity lithium carbonate from the waste saggar can be used for preparing the high-purity lithium carbonate capable of being used for preparing the lithium secondary battery by recycling the waste saggar; and moreover, positive active substances, iron oxide, aluminum oxide, silicate, calcium carbonate and the like which are added in the preparation process can be recycled.

The invention relates to the technical field of biological solid waste treatment, and discloses a biological fermentation concentrated residue slurry separation method and a biological fermentation concentrated residue slurry separation system. At least one of aluminum chloride, aluminum sulfate, ferric sulfate, ferric chloride, magnesium chloride and magnesium sulfate is added for further reaction to remove excessively added sodium silicate, adhesive force among microorganisms is reduced, meanwhile, silicon dioxide is generated, friction is further enhanced, viscosity is reduced, and solid-liquid separation of the high-viscosity biological fermentation residue slurry is finally achieved through filtration; and the method has the advantages of high separation efficiency, simple reaction condition requirements, few reagents and no residue, and has great popularization and application values.

The invention discloses a multi-stage separation and resource extraction sludge treatment system, which comprises a pretreatment unit, a grading separation unit, a resource extraction unit, a tail gas treatment unit and a circulation regulation mechanism, the pretreatment unit comprises a sludge receiving bin, a slurrying device and a crushing device, the fractional separation unit comprises a solid-liquid separation device, an organic matter extraction device and an inorganic matter extraction device, the resource extraction unit comprises a heavy metal recovery device and a phosphorus extraction device, and the heavy metal recovery device and the phosphorus extraction device are communicated with the inorganic matter extraction device through pipelines. The tail gas treatment unit comprises a waste gas collection pipeline and a waste gas purification device, and the circulating adjustment mechanism comprises a device body, a circulating pump and a flow divider valve. The multi-stage separation and resource extraction sludge treatment system provided by the invention has the advantages of high sludge separation efficiency and sufficient resource recovery.

Microbeads capable of controlling the pH of a sample are provided. The microbeads can control the pH of a sample to be equal, similar or close to a target pH without an automated device and the like such as an additional valve system for controlling pH, and thus could be readily applied to fields requiring pH control.

To provide a method for manufacturing a new germicidal disinfectant from sodium hypochlorite degraded during storage.SOLUTION: A method for manufacturing a new germicidal disinfectant from a solution including hypochlorite ion, chloric ion, and chloride ion, includes: a first reaction process of adding sulfuric acid to the solution and generating chlorine gas; a process of reacting the chlorine gas generated in a recovery liquid A with sodium hydroxide or calcium hydroxide and recovering it as hypochlorite ion; a second reaction process of adding sulfuric acid having higher concentration than that in the first reaction process to a reaction mother liquid after the first reaction process and generating chlorine dioxide gas; a process of reacting the generated chlorine dioxide gas with sodium hydroxide and hydrogen peroxide in a recovery liquid B and recovering it as chlorous acid ion; and a process of blending the recovery liquid A with the recovery liquid B to obtain the new germicidal disinfectant.SELECTED DRAWING: None

To provide an industrially viable and cost-efficient process for large-scale preparation of copper fungicidal compounds selected from copper oxide, copper oxychloride, copper acetate, copper carbonate, copper hydroxide, copper naphthenate, copper oleate, copper silicate and tribasic copper sulfate.SOLUTION: A fungicidal formulation comprises: at least one copper fungicide having a D50 particle size of 3-20 micrometers; and at least one agrochemically acceptable excipient.SELECTED DRAWING: None

The purpose of the present invention is to provide an alkaline subcritical water composition, a water-containing composition, a device, and a container which are capable of inhibiting corrosion of a reaction device and capable of decomposing a polymer and the like. The present disclosure is an alkaline subcritical water composition having a pH of 13.7 or less and a potential of 400 mV or more when a current density exceeds 10 mA / cm2 in an anodic polarization curve in which a steel material is used in a test electrode.

The invention belongs to the technical field of high polymer material synthesis, and particularly relates to a low-temperature continuous preparation device and method for high-temperature-resistant nylon, and the method mainly comprises the following steps: a neutralization salt forming stage, a first-stage tubular reactor stage, a second-stage tubular reactor stage and a third-stage tubular reactor stage, therefore, continuous feeding of raw materials such as binary acid and diamine and continuous output of high-temperature-resistant nylon products are realized. The device and the method are suitable for preparing homopolymerized and copolymerized high-temperature-resistant nylon, such as semi-aromatic nylon, alicyclic nylon and nylon containing naphthalene rings, are wide in application range, low in polymerization temperature, short in polymerization time, stable in composition, good in product quality, low in yellow index, high in whiteness and stable in performance, realize backflow of diamine and recovery of materials, and are suitable for industrial production. Generation and emission of three wastes are reduced, and the production cost is reduced.

The present invention relates to an integrated system, apparatus, and method for dealkalization of wood cellulose materials and production of bio-based products. In particular, the system generates dealkalized wood cellulose raw materials that can be used as raw materials for various downstream bio-based products. The system includes a slurry generation subsystem that combines pre-treated particles of wood cellulose material with a water mixture containing water and chemical agents to obtain a slurry; an ultrasonic treatment subsystem that breaks down the cellular structure of the wood cellulose material in the slurry, relaxes the wood cellulose matrix, and removes and neutralizes alkali at the cellular level; a hydrodynamic cavitation subsystem that decomposes the wood cellulose material in the slurry at the cellular level using high shear mechanical decomposition; and a direct steam injection subsystem connected to the slurry generation subsystem and / or the cavitation subsystem to achieve hydrostatic cavitation and alkali neutralization in the slurry.

A method for manufacturing a positive electrode active material precursor comprises a nucleation step of forming nuclei of the precursor in a first reactor; and a nucleus growth step of growing the nuclei formed in the nucleation step in a second reactor, wherein the volume of the second reactor is larger than the volume of the first reactor.