96results 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 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 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 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 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

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 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.

The present application belongs to the technical field of corn stalk resource utilization, and particularly relates to a method and device for directional regulation of anaerobic continuous production of volatile fatty acids from corn stalks. The method comprises the following steps: mixing corn stalks with inoculum in a reactor, adjusting the initial pH to 4.0-10.0, and then performing a continuous hydrolysis and acid production reaction, with corn stalks being added to the reactor at regular intervals every day; in the continuous hydrolysis and acid production reaction, the pH of the reaction system is controlled at 4.0-10.0, and intermittent micro-aeration is performed, with the aeration frequency being once per day after feeding, and the aeration amount being 60-100 mL / L per aeration. The method can achieve efficient directional hydrolysis and acid production from corn stalks, and the total volatile fatty acid concentration and the proportion of acetic acid or butyric acid concentration are both significantly improved.

The present disclosure relates to an acid-base neutralizer. Alkali is distributed within the reactor and acid is added through an acid injector at the bottom of the lower cylindrical section of the reactor after dilution with the neutralized product in the injection tube. The acid injector is located entirely within the vertical portion of the injection tube, and both the acid injector and the vertical section of the injection tube are arranged coaxially with a vertical axis defined by the lower cylindrical section of the reactor.

The invention relates to the technical field of nano nickel protoxide production, in particular to a continuous nano nickel protoxide preparation system and production process based on fluid dynamic regulation and control, the system comprises a fluid supply unit, the fluid supply unit is connected with a precision control unit, the precision control unit is connected with a reaction synthesis unit, and the reaction synthesis unit is connected with a control unit. The reaction synthesis unit is connected with a post-treatment unit, the fluid supply unit comprises a nickel salt precursor storage tank, a reducing agent storage tank and a pH regulator storage tank, and the nickel salt precursor storage tank, the reducing agent storage tank and the pH regulator storage tank are respectively provided with a storage tank equipped magnetic stirring device and a temperature control jacket. Through continuous production, the shutdown time and equipment cleaning time in intermittent production are reduced, the production efficiency is remarkably improved, the precise control unit can adjust fluid parameters in real time, the stability and consistency of reaction conditions are ensured, and the production efficiency is further improved.

Iron removal equipment for nickel-cobalt-manganese sulfate solution and nickel-cobalt-manganese sulfate solution A method for continuously removing iron ions from nickel-cobalt-manganese sulfate solutions at low temperatures is provided. In the iron device, a deferrous reactor (2) and an aging reactor (9) are provided, and the deferrous reactor (2) An agitator (3) is provided in the reactor (9), and an agitator (7) is provided in the reactor (9). The iron removal reactor inner cylinder (5) is provided in the iron removal reactor (2), and the iron removal reactor (2) and the iron removal reaction A mixture supply pipe (12) and a carbonate solution supply pipe (4) are provided between the intermediate layer and the inner tube (5). The mixer (1) of the preheating device is provided at the top of the mixture supply pipe (12), and the mixer (1) The reactor (9) is provided with a compressed air inlet (11) and a liquid supply port (10) for removing iron. An automatic stone powder supply device (8) is provided. A method for removing iron is also provided. The requirements for equipment are low, Energy saving is achieved, continuous production is possible, production capacity and efficiency are greatly improved, and oxidizing agent is added. It is possible to oxidize divalent iron ions to trivalent iron ions without any oxidation, and the iron removal rate is 99.5% or more. There are advantages to this.

The disclosure pertains to an ammonium nitrate reactor with a first type static mixer in the mixing zone upstream of the tube bundle and / or a second type static mixer downstream of the tube bundle.

A method for preparing metallic magnesium and industrial silicon by decomposing serpentine with hydrochloric acid is provided. Serpentine is used as a raw material, and is processed by a two-stage countercurrent leaching process in a hydrochloric acid system. A hydrometallurgical process is adopted, including beneficiation, wet grinding, slurry storage, filtration, two-stage atmospheric pressure hydrochloric acid leaching, washing and filtration of leached silica slag, iron removal and nickel precipitation from a leachate, separation, washing and filtration of a ferric hydroxide precipitate and a nickel hydroxide precipitate, crystallization and evaporation of a magnesium chloride solution, and hydrochloric acid preparation from a flue gas generated after thermal decomposition of magnesium chloride. The present disclosure develops a process of decomposing serpentine with hydrochloric acid and producing metallic magnesium by a drying-electrolysis method, and a process of producing industrial silicon by smelting silica slag in an electric furnace.

Provided is a method for producing a lithium-containing solution that allows suppressing production cost for lithium production by suppressing solution amount after an adsorption step, increasing a lithium content rate in the lithium-containing solution, and suppressing amount of solution used in a step after a manganese oxidation step. The method for producing a lithium-containing solution performs the adsorption step, an eluting step, and an manganese oxidation step in this order. In the adsorption step, an anion-exchange resin is used together with the lithium adsorbent. This aspect allows hydrogen ions generated in the adsorption step to be adsorbed by the anion-exchange resin, thereby promoting an adsorption reaction. Therefore, the solution amount after the adsorption step can be suppressed, the lithium content rate in the lithium-containing solution increases, the amount of the solution used in the step after the manganese oxidation step is suppressed. This allows suppressing production cost for lithium production.

The invention belongs to the technical field of recovery of p-methylphenol by-products, and particularly relates to a device and a method for recovering sodium sulfate by utilizing the p-methylphenol by-products. Comprising a pulping tank, the pulping tank is sequentially connected with a filter, a decoloring kettle, a leaf filter, an evaporator and a centrifugal machine through pipelines, the centrifugal machine is sequentially connected with a boiling dryer and a packaging machine, the liquid phase output end of the centrifugal machine is connected with a high-whiteness mother liquor tank and a low-whiteness mother liquor tank in parallel through a pipeline, and the high-whiteness mother liquor tank is connected to the liquid inlet end of the evaporator through a pipeline. The low-whiteness mother liquor tank is connected to the pulping tank through a pipeline, and the condensate water output end of the evaporator is connected with a condensate water tank through a pipeline. According to the method, the by-product can be converted into the high-purity I-class premium-grade sodium sulfate, so that waste is turned into wealth, the treatment cost of the by-product is reduced, additional economic benefits are brought, and the profit margin of p-methylphenol is improved.