16 results about "Acid concentration" patented technology

This utility model belongs to the field of stainless steel pipe pickling technology, specifically relating to an acid concentration adaptive automatic pickling tank, including a tank body. A perforated plate is fixedly connected to the inner wall of the tank body. An acidity detector is embedded in the tank body. A sealing baffle is detachably connected to the tank body. A disturbance component is arranged below the perforated plate. A reflux component and a vibration component are arranged on the side wall of the tank body. The disturbance component includes a motor, which is fixedly mounted on a mounting frame. A bevel gear is fixedly connected to the output shaft of the motor. This acid concentration adaptive automatic pickling tank, through the use of the disturbance component, uses a motor to drive the agitator blades to rotate, agitating the acid solution. The reflux component, through synchronous transmission, rotates the spiral blades, transporting the acid solution from the bottom of the tank to the top, promoting the circulation and mixing of the upper and lower layers of acid solution, significantly reducing concentration stratification and avoiding excessive or insufficient acid replenishment due to local concentration deviations, thus ensuring stable pickling results.

This invention proposes an indirect steam heating device resistant to strong acid corrosion, belonging to the field of steam heating technology for strong acid corrosion resistance. Addressing the technical problems of existing strong acid environment heating technologies, such as acid concentration dilution, poor corrosion resistance of ordinary materials, low heating efficiency of plastic materials, and small heat exchange area, this invention provides an indirect steam heating device resistant to strong acid corrosion in strong acid environments. It achieves the technical goals of not diluting the acid concentration, long-term resistance to strong acid corrosion, and efficient increase in the temperature of strong acid solutions. Furthermore, by optimizing the pipeline layout to increase the heat exchange area, it further improves heating efficiency, meeting the requirements for efficient oxide layer removal in beryllium copper strip production.

The application provides a heterogeneous reservoir acid fracturing parameter design method and system, the method constructs an acidification reconstruction geometric model for a reservoir to be reconstructed, introduces required acidification section length and section thickness data to calculate acid liquid flow rates in fractures under different construction discharge capacities in combination with fracture attribute data, further considers acid etching reaction rates and mass transfer coefficients to calculate acid concentrations on inner walls of fractures reacted with a reservoir matrix, determines etching widths of natural fracture walls according to attribute parameters of the reservoir matrix, further calculates reservoir etching volumes corresponding to different construction acid amounts and acid etching fracture widths and lengths, finally decides corresponding acid etching fracture conductivity capacities according to a correction principle of an N-K model, and selects optimal acid injection parameters according to preset optimization conditions. By using the scheme, the problems of small calculation scales and complicated operations in the prior art are effectively overcome, analytical solutions are flexibly used in the calculation process, and an acid injection scheme with optimal acid etching effects and conductivity capacities is accurately and efficiently selected.

The application belongs to the technical field of water treatment, and particularly discloses an acid recovery device. The acid recovery device comprises an acid separator and acid concentration electrodialysis. The acid separator is sequentially arranged and placed by a positive charge microporous semi-permeable membrane, a negative charge fibrous filler, a positive charge microporous semi-permeable membrane, a raw material chamber separation net and a positive charge microporous semi-permeable membrane. The components arranged in this way can be arranged in multiple ways to realize more efficient treatment. Dilute acid from the acid separator enters the acid concentration electrodialysis component for treatment. The acid recovery device has the advantages of fast diffusion speed, high salt concentration of waste acid, the ability to treat waste acid with high salt concentration, high recovery rate and the like.

Peroxycarboxylic acid compositions comprising compatible ionic compounds to deliver conductivity signals to enable monitoring of the peroxycarboxylic acid concentration by conductivity when diluted for use are disclosed. Methods of measuring peroxycarboxylic acid concentration by conductivity are also disclosed. Beneficially, conductivity measurement allows a user to determine concentration of the peroxycarboxylic acid at a point of use without cumbersome titration steps to determine the concentration providing various benefits at an application of use.

Disclosed methods employ acid generator components in an underlayer. Acid generated by the acid generator components diffuses into an overlying layer, e.g., a photoresist layer, and provides acid which chemically alters the photoresist, e.g., alters the solubility of the photoresist in a developer solution. The acid that diffuses into the overlying photoresist layer increases the concentration and the uniformity of concentration of the acid in lower portions of the photoresist. The regions of increased acid concentration within the photoresist can increase the photoresists solubility in developer solutions, thereby reducing inadequate development of the photoresist. Reducing inadequate development of the photoresist can reduce the amount of photoresist residue or scum that remains after development is complete.

The present invention relates to a method for preparing, by means of physicochemical polishing, a powder of non-nanoscale guanine particles, wherein all the dimensions of the particle have a minimum size greater than 100 nm and the particles have a single "alpha" polymorphic form, characterized in that the method comprises the following steps: (i) suspending the guanine particles (i1) in a basic aqueous solution or alternatively (i2) in an acidic solution, the base or alternatively acid concentrations being lower than the concentrations allowing the formation of guanine salts; (ii) filtering and recovering the particles; (iii) sequentially washing the particles with aqueous solutions having a decreasing base concentration when step (i) is carried out (i1) in a basic medium or alternatively with aqueous solutions having a decreasing acid concentration when step (i) is carried out (i2) in a basic medium, followed by rinsing the particles with water; and (iv) recovering, in particular by filtration, a powder of non-nanoscale particles having a single "alpha" polymorphic form.

This invention relates to the field of cold rolling technology, specifically to a turbulent pickling system and method based on sealed rollers. The system includes: an overflow tank, a pickling tank fixedly connected to one side of the overflow tank, an overflow tank fixedly connected to one side of the pickling tank, and another overflow tank fixedly connected to one side of the overflow tank. This invention utilizes a circulation mechanism with multiple sets of circulation tanks, transport pipes, and circulation pipes working together. The circulation mechanism, along with the sealed overflow mechanism, maintains a balanced liquid level in each circulation tank, ensuring consistent flow rates for waste acid discharge, acid flow, and new acid injection, thus stabilizing the pickling process environment. The extrusion mechanism uses squeeze rollers to extrude the strip surface, effectively reducing the amount of acid trapped in the strip, minimizing acid waste, and reducing the load on subsequent rinsing processes, saving water resources. Furthermore, the synergistic effect of the extrusion mechanism and the sealed overflow mechanism further blocks reverse acid flow, helping to maintain stable acid concentration in each pickling tank and improving the pickling effect.

This invention discloses a method for efficiently leaching zinc, indium, and germanium from hard zinc slag, belonging to the field of hydrometallurgical technology. A leaching agent with an acid concentration of 125-130 g / L is added to the hard zinc slag at a liquid-to-solid ratio of 4-4.5:1, and the reaction is carried out at 75-85°C for 55-65 min. KMnO4 is then added at a dosage of 15-18 g / L, and the reaction is continued for 8-12 min. A pH adjuster is added to adjust the pH of the system to 4.5-5.0, and the reaction continues for 15-25 min. The leached slurry is then separated into liquid and solid components. The first stage of leaching solution enters the zinc recovery process, and the first stage of leaching residue is used as raw material for the second stage of high-acid enhanced leaching. A leaching agent with an acid concentration of 280–300 g / L is added to the first-stage leaching residue at a liquid-to-solid ratio of 5.5–6:1. The temperature is raised to 85–95℃, and NaClO3 is added at a dosage of 20–25 g / L. The reaction is carried out for 3.5–4.5 hours. The leached slurry is then separated into liquid and solid components. The second-stage leaching solution enters the indium and germanium recovery process, and the second-stage leaching residue is stockpiled. This method can achieve a zinc leaching rate >98%, an indium leaching rate ≥88%, and a germanium leaching rate ≥90% for hard zinc slag. The indicators of the first-stage leaching solution meet the requirements for reuse in zinc smelting production and can be directly reused in the zinc recovery process. The second-stage leaching solution provides qualified raw materials for subsequent indium and germanium recovery processes.

This invention relates to a low-hydrochloric acid concentration chlorination distillation method in the germanium extraction process, belonging to the field of germanium recovery and extraction technology. An HCl solution and a chloride salt are mixed as a leachate. The leachate is then mixed with a germanium-rich raw material and subjected to chlorination distillation. After cooling, the germanium-rich distillate, HCl absorbent, and distillation residue are collected. This invention employs a chloride salt-assisted dilute acid leaching method, significantly reducing the acid concentration and acid consumption in the chlorination distillation process. Simultaneously, the germanium leaching rate can reach over 97%, and the germanium recovery rate remains at a high level, exceeding 94%.

This invention relates to the field of acid preparation technology, and more particularly to an automated hydrolysis acid preparation device, comprising a preparation unit, a control unit, and two metering units. The preparation unit includes an acid preparation cylinder with a temperature regulating chamber and an insulation layer, a stirring mechanism, and thermocouples to achieve material mixing and temperature control. The metering unit has multiple metering cylinders and regulating cylinders of different volumes, achieving high-precision volume measurement through a drive plate, piston rod, and locking structure, and can automatically combine multiple metering cylinders to complete the output of a specified volume. The control unit receives temperature and signal data and coordinates the metering and preparation process. This invention can accurately control the volume ratio of solute to solvent and the reaction temperature, improving the accuracy of acid concentration, operational safety, and automation level, and is applicable to acid preparation processes with high requirements in various industries.

The utility model discloses an automatic acid preparation protection device of a ceramic filter, which belongs to the technical field of acid preparation of ceramic filters and comprises a bottom plate, an acid preparation tank, a water storage tank and an acid liquor storage tank are respectively connected to the upper surface of the bottom plate, a sealing bearing is embedded in the inner top wall of the acid preparation tank, and an inner ring of the sealing bearing is connected with a stirring mechanism. The upper surface of the water storage tank and the upper surface of the acid liquor storage tank are both communicated with liquid injection ports, metering pumps are installed on the inner bottom wall of the water storage tank and the inner bottom wall of the acid liquor storage tank, and through cooperation of a concentration sensor and a pressure sensor in the acid preparation tank, the matching concentration of acid liquor and the pressure in the acid preparation tank can be monitored in real time; therefore, once the concentration does not conform to a set value or the pressure exceeds a safety range, the PLC control box can respond in time, then the pressure in the acid preparation tank is released by opening the pressure release valve, and meanwhile, the device can stop running immediately, so that an operator takes various measures, and the safety of equipment and personnel is effectively guaranteed.

This invention discloses a device and method for measuring the reaction rate of acid-rock samples with a single-end-face tangential circulating flow, relating to the field of oil and gas well acidizing experimental evaluation technology. The device includes a horizontally oriented cylindrical reaction chamber, an external circulation pump, a tangential inlet, a tangential outlet, a cylindrical rock sample clamping unit, a temperature and pressure control unit, and a reaction process data acquisition unit. The inlet and outlet are located on the circumferential wall and staggered. The external circulation pump drives the acid solution through an external circulation pipeline to form a tangential circulating flow around the horizontal axis within the chamber. The clamping unit is sealed and installed within a radial mounting hole on the circumferential wall, fixing the cylindrical rock sample and sealing its sidewalls, exposing only one circular end face, allowing the acid solution to pass tangentially along the end face. During measurement, changes in acid concentration, rock sample mass, or reaction product ion concentration are obtained, and the acid-rock reaction rate parameters are determined in conjunction with the end face area. Furthermore, mass transfer parameters are calculated in conjunction with the end face tangential flow parameters.

The utility model provides a kind of industrial grade phosphoric acid post-treatment device, the device includes by pipeline sequentially communicating back extraction acid preheater, pre-concentration I effect component, pre-concentration II effect component, pre-concentration acid preheater, decoloring bleaching tower, defluorination tower, defluorination acid pump, final concentration component and product acid cooler;The defluorination tower top is communicated with pre-concentration I effect component, and defluorination steam from defluorination tower enters pre-concentration I effect component, provides heat source for pre-concentration;The defluorination tower bottom is equipped with steam air inlet, and bleaching acid after being handled by decoloring bleaching tower is sent to defluorination tower upper portion feed, and low-pressure steam entered in tower bottom in defluorination tower is fully contacted in tower, stripping removes fluorine in bleaching acid.The device can solve the existing purification phosphoric acid post-treatment concentration steam consumption, product fluorine content is slightly high, product acid concentration fluctuation is larger production system problem.

This invention relates to the field of waste acid concentration in titanium dioxide production, and discloses a material and method for repairing the impeller stub of a waste acid concentration circulating pump. The method includes: a first material for repairing corrosion pits in the steel layer of the impeller stub; and a second material for repairing the inner plastic lining of the impeller stub. The first material, by mass ratio, comprises 5.5-6.5 parts of 977-S high-temperature flux-resistant vinyl ester resin, 0.4-0.6 parts of curing agent, 0.4-0.6 parts of accelerator, and 2.5-3.5 parts of acid-resistant cast stone powder; the second material comprises 44-48 parts of 977-S high-temperature flux-resistant vinyl ester resin, 43-47 parts of curing agent, 3-5 parts of glass flakes, and 4-6 parts of accelerator. The material proposed in this invention does not require heating during repair, the stub lining can be repaired multiple times, the repair method is simple and environmentally friendly, quick, and produces high-quality repairs.

The present application relates to a kind of low acid consumption solid solution treatment device for stainless steel production, belong to waste liquid treatment technical field.The device includes temporary storage tank, concentration tank body, water pump II, annular pipe I, flow guide mechanism and detection mechanism.Concentration tank body is divided into concentration cavity I and temporary storage cavity I by partition plate;Water pump II pumps pickling liquor into concentration cavity I by spraying pipe;Annular pipe I sprays hot air to pickling liquor by hot air jet I;Flow guide mechanism makes pickling liquor slowly overflow and prolongs flow path by flanging structure and flow resistance ball, increases contact time with hot air;Detection mechanism detects acid concentration in real time by online refractometer detection device in detection box, qualified acid liquor is discharged to calcination furnace, unqualified acid liquor is returned to temporary storage cavity I and re-concentrated.The present application prolongs heat exchange time by layered heating and flow guide, improves concentration efficiency, and realizes real-time detection and automatic reflux cycle of acid concentration, effectively reduces acid consumption, improves acid utilization.