569 results about "Spent acid" patented technology

The invention relates to an alkaline activated carbon multi-stage synergistic potassium removal method, and belongs to the technical field of activated carbon materials. According to the method, a four-step synergistic process of water washing, acid pickling, ion exchange and nitrogen calcination is adopted, and a waste acid recycling closed-loop system is combined. The deep removal of residual potassium is realized through the synergistic effect of countercurrent water washing, pH (Potential of Hydrogen) staged regulation and control acid washing, deep potassium removal by ion exchange resin and nitrogen protection calcination, and meanwhile, the high specific surface area is maintained; the pickling waste liquid is neutralized, concentrated and crystallized to be converted into agricultural potash fertilizer, and mother liquid is recycled to form green circulation.

The invention relates to the technical field of acidic wastewater titrimetric analysis, and discloses an automatic sampling titrimetric analysis method based on a copper smelting acidic wastewater treatment link, which comprises the following steps: collecting waste acid to obtain a waste acid sample; carrying out titration treatment on the waste acid sample to obtain a waste acid sample image after the titration reaction is finished, and carrying out sediment outline extraction on the waste acid sample image to generate sediment coagulation complexity; according to the method, automatic sampling titration is combined with image analysis, precipitation coagulation complexity and arsenic specific hue separation degree are extracted, a precipitation effectiveness index and an arsenic residue risk coefficient are generated through dynamic fusion, arsenic precipitates and other precipitates in similar forms are accurately distinguished by utilizing precipitate contour features and arsenic specific hue in an HSV color space, and the arsenic content is accurately determined. The method has the advantages that spectral signal superposition interference is avoided, and the arsenic residual state can be accurately reflected, so that whether arsenic removal is qualified or not is reliably judged, the accuracy and safety of waste acid treatment are improved, and the quality of water reuse is guaranteed.

The invention provides a method for recovering valuable metals from sulfuric acid process titanium white waste acid through steel slag treatment. The method comprises the following steps: recovering to obtain ferrous sulfate heptahydrate crystals; s2, recovering Sc metal, and extracting the filtrate in the step S1 to obtain a first loaded organic phase and a first raffinate; the first loaded organic phase is washed with alkali liquor, and a second loaded organic phase and washing water are obtained through reverse extraction; treating the washing water to obtain titanium phosphate; back-extracting the second loaded organic phase by using alkali liquor, carrying out filter pressing to obtain crude Sc (OH) 3, and refining to obtain scandium oxide; extracting the first raffinate to obtain a third loaded organic phase and a second raffinate, pickling the third loaded organic phase, reversely extracting with ammonia water, adding phosphoric acid for reaction, and treating to obtain titanium phosphate; and steel slag is added into the second raffinate for neutralization leaching and hydrolysis vanadium precipitation, vanadium-rich slag is obtained through filtering, and then the vanadium electrolyte is prepared. According to the method, iron is separated through crystallization, scandium and titanium are separated through extraction, vanadium-rich slag is separated through neutralization and precipitation, and efficient utilization of resources is achieved.

The invention relates to the technical field of hydrometallurgy production, and particularly discloses a method for synergistically extracting gallium and scandium by coupling titanium white waste acid with vanadium extraction converter sludge, which comprises the following steps: mixing titanium white waste acid and vanadium extraction converter sludge in proportion, stirring and leaching to obtain a leaching solution; adding an extraction agent and a diluent into the leaching solution for extraction, and washing to obtain a gallium and scandium loaded organic phase; a first stripping agent is added into the loaded organic phase of gallium and scandium for stripping treatment, and a gallium stripping solution and a loaded organic phase of scandium are obtained; sequentially carrying out alkali precipitation, alkali dissolution and electrolytic treatment on the gallium reverse extraction solution to obtain crude gallium; a second stripping agent is added into the scandium-loaded organic phase for stripping treatment, and a scandium precipitation solution and an organic phase solution are obtained; and the scandium precipitation solution is filtered, washed and subjected to acid dissolution, and a scandium-containing solution is obtained. According to the method, the titanium white waste acid is effectively recycled, rare and precious metals in the vanadium extraction converter sludge are efficiently and synergistically extracted, and the method has a relatively good popularization prospect.

The invention discloses a continuous preparation method of sodium tanshinone IIA sulfonate based on a single-tube thin-layer liquid membrane reactor. Comprising the following steps: (1) dissolving tanshinone IIA in an organic solvent as a feed liquid; (2) reacting gas-phase sulfur dioxide with air, and cooling to obtain sulfur trioxide mixed gas; (3) enabling the feed liquid and sulfur trioxide mixed gas to enter a single-tube thin-layer liquid membrane reactor in a parallel flow or reverse flow manner, and carrying out continuous sulfonation reaction to obtain reaction liquid; and (4) adding a sodium salt aqueous solution into the reaction solution to carry out salt forming reaction, centrifuging, drying and purifying to obtain the tanshinone IIA sodium sulfonate. According to the invention, a novel method is adopted to carry out sulfonation reaction on tanshinone IIA, and sulfur trioxide is basically completely consumed after the reaction is finished, so that the generation of waste acid is greatly reduced, and the method has important significance on environmental protection and cost reduction. The green, safe, efficient and continuous preparation of the high-purity tanshinone IIA sodium sulfonate is realized.

The invention relates to the technical field of distillate oil refining, and discloses a vacuum distillate oil deacidification method which comprises the following steps: S10, performing deacidification treatment on vacuum distillate oil and a deacidification agent in a deacidification unit; s20, carrying out extraction separation on the obtained deacidification agent to be generated and a back extraction agent in a back extraction mixing coalescer; s30, the separated supernatant liquid is conveyed to a back extractant regeneration device for regeneration treatment; s40, the separated lower-layer liquid enters a deacidification agent regeneration device to be subjected to regeneration treatment; the deacidification unit comprises one or more deacidification mixing coalescers, each of the deacidification mixing coalescers and the back extraction mixing coalescers comprises a shell, each shell is provided with a premixing area, a coalescence separation area and a settling separation area from top to bottom, structured packing is arranged in the premixing areas, and polar fiber bundles are arranged in the coalescence separation areas; the deacidification agent contains organic amine, a cosolvent and water. The method can be used for deacidification treatment of vacuum distillate oil with high viscosity and high acid value, and is wide in application range.

The invention relates to a method for extracting vanadium by using high-calcium steel slag and titanium dioxide waste acid, and relates to the technical field of resource utilization of metallurgical chemical waste, the method comprises the following steps: crushing high-calcium steel slag to obtain high-calcium steel slag powder; mixing the high-calcium steel slag powder and the titanium white waste acid to obtain a mixture; the mixture is heated and stirred for a reaction, then solid-liquid separation is conducted, and filtrate containing vanadate is obtained; the filtrate containing vanadate is subjected to purification treatment, and purified filtrate is obtained; and the purified filtrate is purified and refined, and a vanadium product is obtained. According to the method, the high-calcium steel slag and the titanium white waste acid are comprehensively treated, so that the resource utilization of wastes is realized, the environmental pollution is reduced, the process is simple and feasible, the operability is high, additional specific equipment is not needed, and the method has a good industrial application prospect. Meanwhile, the obtained vanadium product is high in purity and can be widely applied to the fields of steel, aerospace, chemical engineering and the like.

The present invention belongs to the technical field of cathode materials for lithium-ion batteries, and specifically relates to a method for recycling waste lithium iron phosphate. The method includes first calcining waste high-carbon lithium iron phosphate powder or lithium iron phosphate electrode sheets to obtain oxidized lithium iron phosphate; then performing two times of coating-sintering on the oxidized lithium iron phosphate and carbon source substances to obtain a regenerated lithium iron phosphate / carbon composite material; wherein during the first coating-sintering, the carbon source substances include a lithium source, an iron source, a phosphorus source and a carbon source 1, and the carbon source substances in the second coating-sintering include a carbon source 2. The method of the present invention does not require acid leaching of waste materials, no waste water or waste acid is generated during the entire recycling process, it is more environmentally friendly, does not require high temperature and high pressure, has low cost, and is a method for recycling waste lithium iron phosphate suitable for large-scale production.

The invention provides a stainless steel pickling waste acid recovery device and a using method thereof.The waste acid recovery device comprises a pickling device and a recovery tower, the pickling device comprises a pickling tank and a filter pipe installed at the bottom of the pickling tank, the filter pipe is communicated with the recovery tower, the recovery tower comprises an evaporation barrel, and the evaporation barrel is fixed to the ground; comprising a combustion chamber and an evaporation chamber which are stacked from bottom to top, and gas is introduced into the combustion chamber for combustion to heat the evaporation chamber; waste acid in the pickling tank is filtered by the filter pipe and enters the evaporation chamber to be heated and evaporated; a catalysis disc, a spraying section and a cooling section are sequentially arranged above the evaporation chamber in a stacked mode, the evaporation chamber is communicated with the cooling section through a gas conveying pipe, the cooling section is communicated with the spraying section arranged below, and cooled waste acid steam enters the spraying section to be mixed with rinsing water. Waste acid steam of nitric acid and hydrofluoric acid absorbed by the rinsing water flows downwards to enter the catalytic disc for reaction. According to the waste acid recovery device provided by the invention, the structure is simplified, and the waste acid recovery efficiency and recovery rate are improved.

The utility model relates to a device for recovering magnesium salt tablets from industrial magnesium salt-containing wastewater, which is characterized in that magnesium salt in industrial waste acid is recovered by adopting an evaporation mode, after the magnesium salt-containing wastewater is filtered and precipitated, a supernatant solution enters an evaporation system to be evaporated and concentrated, a concentrated solution is recovered, cooling and flaking are carried out, and flaked magnesium salt is collected. The evaporation system comprises an evaporator and a condenser. The evaporation system increases the evaporation speed by enhancing evaporation; through the characteristic of normal-pressure evaporation, the problems that the boiling point is increased due to the fact that the solubility of the solution is increased, and energy consumption is increased due to the fact that the requirement for the quality of a heat source is improved in a traditional boiling evaporation process link and the evaporation system works unstably are solved. Compared with the prior art, the energy utilization efficiency is improved, the energy consumption is reduced, the operation stability of the system is improved, and the risk that the evaporator is scaled and blocked is avoided.

The invention discloses a waste sulfuric acid treatment method and device, the device comprises a sintered filter element filter, a fine filtration coalescer, an adsorption tank and a membrane separator which are connected in sequence, and the fine filtration coalescer adopts a ceramic membrane tube or a polytetrafluoroethylene membrane tube or a silicon carbide lining membrane tube as a filter material; an adsorption material in the adsorption tank is one or a combined adsorption material of more than two of activated carbon, a modified molecular sieve, a metal organic framework material and a nano adsorption material; and the membrane separation system adopts one or a combined membrane of more than two of an ultrafiltration membrane, a reverse osmosis membrane and an electrodialysis membrane. The alkylation waste acid regeneration process can be simplified, the occupied area of the device is saved, the engineering investment is reduced, and the operation cost is greatly reduced compared with that of an existing process technology; according to the method, a physical separation means is adopted, organic polymeric oil, dissolved organic matters, dissolved salts and other impurities in the alkylated waste sulfuric acid can be effectively removed without decomposing and reconstructing the waste sulfuric acid, and the concentrated sulfuric acid after concentration completely meets the production requirements of an alkylation device.

The utility model relates to a wastewater treatment system which comprises an adjusting tank, a first-stage reaction unit, a second-stage reaction unit, a third-stage reaction unit and a filtering unit which are connected in sequence, wherein the adjusting tank is used for mixing evaporative crystallization mother liquor with waste acid to obtain mixed liquor; the first-stage reaction unit is used for adding lime milk into the mixed liquid for neutralization reaction to obtain first supernate; the second-stage reaction unit is used for removing chloride ions in the first supernate by using an ultrahigh lime aluminum method to obtain second supernate; the third-stage reaction unit is used for performing hardness removal treatment on the second supernate to obtain third supernate; the filtering unit is used for filtering the third supernate and then sending the filtered third supernate to the front end of the wastewater zero discharge system for retreatment. The evaporative crystallization mother liquor and the waste acid are synchronously treated by adopting the technologies of neutralization reaction, ultrahigh lime aluminum method, hardness removal, filtration and the like, so that components such as COD (Chemical Oxygen Demand), sulfate radicals, chloride ions and the like in the evaporative crystallization mother liquor and the waste acid can be removed in a sludge form.

The invention discloses a process method and a process device for deep treatment of organic waste sulfuric acid, and aims to solve the problems of corrosion, high salt content, poor concentration effect and the like in a high-concentration waste sulfuric acid (the concentration of sulfuric acid is 30-60%) treatment system, a high-concentration ozone oxidation-ceramic ultrafiltration membrane-resin bed adsorption process is adopted to realize efficient degradation and separation of organic matters in waste acid, and the treatment efficiency is improved. The resource recovery of the waste sulfuric acid is realized; aiming at the problems that solid waste in the sulfuric acid industry has complex salt components (such as sodium salt and ferric salt), the generation amount is large, the absorption treatment is difficult, the economic benefit is poor and the like, an ultrafiltration + nanofiltration + resin adsorption + reverse osmosis pre-concentration-evaporation / waste heat recycling cascade concentration technology is developed, acid wastewater treatment is carried out, and electricity, heat and water integrated energy efficient utilization of the system is realized.

The invention discloses a method for separating and extracting rhenium in smelting waste acid, which comprises the following steps: adding hydrogen peroxide into rhenium-containing waste acid for oxidation, adding Na2S for copper precipitation and molybdenum precipitation, acidifying supernate, extracting by adopting an extraction organic phase formed by mixing TOA, sec-octyl alcohol and kerosene, and carrying out chemical reverse extraction on the extraction phase by using ammonia water, and carrying out condensation crystallization and vacuum filtration on the strip liquor to obtain ammonium rhenate solid powder and the like. According to the method, a separation and extraction method of precipitation-extraction-condensation crystallization is adopted, and high-selectivity extraction of the high-valence rhenium compound is carried out through TOA, so that effective extraction of rhenium can be completed only through primary extraction and reverse extraction, the process period of rhenium extraction is effectively shortened, the total yield of rhenium reaches 99% or above, and the method is suitable for industrial production. And the mass fraction of the produced ammonium rhenate product is greater than 99.9%, and the method has the advantages of low process technology cost and easier realization of industrialization.

The invention relates to the field of C01B17 / 69, in particular to a dilute sulphuric acid concentration and desalination technology for dye production, waste sulphuric acid generated in the vat dye production process is automatically and efficiently treated by designing three-stage evaporation concentration, freezing crystallization and centrifuge desalination technologies, the waste sulphuric acid is concentrated to the concentration of 93-95%, resource recycling is achieved, and the cost is reduced. Meanwhile, inorganic salt in the waste sulfuric acid is fully separated, so that the regenerated sulfuric acid obtained after treatment meets actual use standards and requirements; the energy consumption is low, the efficiency is high, the operation treatment capacity is large, the waste acid treatment capacity reaches up to 27000 tons per year, and huge market application potential is embodied; the method is simple in process, high in operation automation control level, safe, stable and stable in operation, large-scale continuous production can be realized, and an efficient, safe, economical, continuous and reliable treatment method is provided for treatment of waste acid generated in the vat dye production process.

The invention discloses a waste sulfuric acid treatment method, and relates to the technical field of environmental engineering, the waste sulfuric acid treatment method comprises: a pretreatment module configured with a multi-stage filtering device and a pH adjusting tank and used for removing suspended solids in waste acid and adjusting the acid concentration; a vanadium-titanium-cerium composite catalyst is arranged in the catalytic cracking reactor, sulfuric acid is decomposed at a set temperature under microwave-assisted heating to generate SO2 gas, and meanwhile heat energy is supplied to the pretreatment unit through a waste heat recovery device; the electrochemical separation module comprises a bipolar membrane electrodialyzer and a pulse electrode array and is used for separating and recovering metal ions Fe < 3 + > and Cu < 2 + > from the cracking raffinate and regenerating sulfuric acid with a set concentration; and the intelligent control center integrates an AI algorithm and an Internet of Things sensor, and dynamically optimizes the cracking temperature, the membrane voltage and the material flow. According to the invention, intelligent sorting, directional conversion and closed-loop recovery are taken as the core, and the problems of high energy consumption, difficulty in differential treatment and heavy pollution in waste sulfuric acid treatment are solved.

The invention discloses a waste sulfuric acid treatment method and system. The system comprises a sintered filter element filter, a fine filtration coalescer, an adsorption tank, a gas stripping tower, an alkaline washing tower, a molecular sieve dehydration device and a gas medium heating facility, a ceramic membrane tube or a polytetrafluoroethylene membrane tube or a silicon carbide lining membrane tube is adopted as a filter material of the fine filtering coalescer; an adsorption material in the adsorption tank is one or a combined adsorption material of more than two of activated carbon, a modified molecular sieve, a metal organic framework material and a nano adsorption material. The alkylation waste acid regeneration process can be simplified, the occupied area of the device is saved, the engineering investment is reduced, and the operation cost is greatly reduced compared with that of an existing process technology; a physical separation means is adopted, organic polymeric oil, dissolved organic matter, dissolved salt and other impurities in the alkylation waste sulfuric acid can be effectively removed without decomposing and reconstructing the waste sulfuric acid, and the concentrated sulfuric acid after concentration completely meets the production requirements of an alkylation device.

The utility model relates to the technical field of ore separation waste acid treatment, and discloses an ore test waste acid recycling pretreatment device which comprises a treatment box, a separation assembly and a detection control module, the separation assembly comprises a first recovery mechanism and a second recovery mechanism, and the first recovery mechanism and the second recovery mechanism can respectively filter the waste acid liquid in the treatment box; the detection control module comprises a control unit and a pH sensor, the control unit is in control connection with the separation assembly, and when the pH value in the treatment box reaches a preset value, the first recovery mechanism and the second recovery mechanism respectively filter and recover the waste acid liquid in the treatment box. According to the utility model, the two groups of mutually independent recovery mechanisms are arranged, and different precipitates are respectively collected into different recovery mechanisms by utilizing different precipitation rates of different metal ions under different pH values, so that the resource recovery of lead and zinc can be realized in the pretreatment process of the lead-zinc ore beneficiation and smelting waste acid solution; the recovery efficiency of metal resources in the waste acid is improved.

The invention discloses an automatic temperature control method and system for an acid regeneration roasting furnace, and belongs to the field of automatic control. The method comprises the following steps: adjusting waste acid supply flow according to waste acid concentration change; meanwhile, the temperature of the roasting furnace is controlled, specifically, first PID operation is conducted according to the real-time outlet temperature of the roasting furnace and a preset temperature target value, and the first PID operation is converted into a gas flow target value after being processed through a slope generator; after second PID operation is carried out according to the real-time gas flow and the gas flow target value, opening control of a gas valve is carried out, and the gas flow is converted into an air flow target value after processing; third PID operation is carried out according to the real-time air flow and the air flow target value, and then the third PID operation is used for controlling the opening degree of an air valve; and the burner in the roasting furnace burns by mixing gas and air output by the gas valve and the air valve so as to regulate and control the temperature of the roasting furnace. The temperature of the acid regeneration roasting furnace is automatically controlled.

The present invention belongs to the technical field of titanium metal processing waste acid treatment, and specifically relates to a method for regenerating titanium metal pickling waste liquid. The regeneration method comprises the following steps: adding a fluorosilicic acid solution to the titanium metal pickling waste liquid and mixing uniformly, then adding a potassium salt solution, stirring the reaction at room temperature, and centrifuging or filtering after the reaction is complete to separate the solid portion as a potassium fluorotitanate / potassium fluorosilicate complex; and the liquid portion as a regenerated titanium metal pickling liquid. The method of the present invention can significantly improve the titanium ion recovery rate without destroying the pickling liquid components. The titanium metal pickling waste liquid can be regenerated and reused, and has the advantages of good treatment effect and simple treatment process.

The invention relates to the technical field of positive electrode material precursors, in particular to a method for preparing battery-grade iron phosphate by taking titanium dioxide waste acid as a raw material and application of the battery-grade iron phosphate. Hydrolysis waste acid in the titanium dioxide industry is selected as the raw material, ammonia gas is used as a pH regulator, and phosphorus salt and hydrogen peroxide are used as precipitants; the solubility product constants of aluminum phosphate and titanium phosphate are small, Al < 3 + > and Ti < 4 + > in the hydrolysis waste acid are precipitated by adopting soluble phosphate and then are filtered and removed, iron ammonium phosphate is precipitated by virtue of phosphorus salt and is fully washed, and the content of metal impurity ions can be reduced to be less than 100ppm; according to the method, ferrous sulfate is subjected to fractional precipitation, impurity removal, precipitation, washing and aging under different pH conditions, so that the use amount of alkaline substances is greatly reduced, and the problems of high liquid waste treatment cost and resource waste in the traditional titanium dioxide industry are solved.

The invention provides a low-consumption wet smelting process for flotation zinc oxide concentrate, which comprises the steps of pretreatment, low-acid leaching and post-treatment, and specifically comprises the following steps: adjusting the mass concentration of the raw material flotation zinc oxide concentrate to be 15-45%, adding an ultrasonic-synergistic stripping agent, and stirring uniformly; reacting for 5-45 minutes under an ultrasonic stirring condition to obtain ore pulp a; the ultrasonic-synergistic stripping agent is prepared from alkylbenzene sulfonate, octylphenol polyoxyethylene ether and persulfate; a decarburizing agent and a particle enhancer are added into the ore pulp a, the pH value is adjusted to 8.5-9.5, fine air is introduced for 5-10 min, and zinc oxide concentrate b is obtained through solid-liquid separation; waste electrolyte and / or waste acid are / is added into the zinc oxide concentrate b for a leaching reaction, and leaching liquid c is obtained; and the leaching solution c is subjected to neutralization iron removal and zinc powder replacement impurity removal, and then a zinc ingot is obtained.

The invention discloses a nitrate-containing waste liquid treatment method, which comprises: (1) waste acid treatment: diluting waste acid in a neutralization reaction kettle, adding ammonia water while stirring, controlling the temperature to be 70-95 DEG C, continuously adding ammonia water to adjust the pH value of the solution to be 7.5-10.0 after the neutralization is completed, and carrying out stirring distillation to obtain an ammonium sulfate nitrate aqueous solution or an ammonium sulfate nitrate crystal; (2) wastewater treatment: 1) wastewater steam stripping: transferring nitrate wastewater into a steam stripping kettle, adding a pH regulator to regulate the pH value to be 10-13, heating the steam stripping kettle to a boiling state by using steam, distilling, condensing and recovering nitrate in the wastewater; and 2) oxidation treatment: after steam stripping is finished, hydrogen peroxide is added into the steam stripping kettle in a boiling state, stirring reaction is performed, and the reacted wastewater can be discharged after reaching the standard. Compared with a traditional Fenton method and an activated carbon adsorption method, the method has the advantages that secondary pollutants Fe (OH) 3 generated by treatment and saturated activated carbon after adsorption can be avoided, harsh reaction conditions such as light, electricity and microwaves can be avoided, the operation cost is reduced, the method is safe, environment-friendly and free of secondary pollution, the nitrate removal rate can reach 100%, and the method is suitable for industrial production. The COD (Chemical Oxygen Demand) of the treated wastewater is less than 100mg / L, and the wastewater can reach the direct discharge standard.

The utility model discloses an evaporator and a pickling facility low-corrosion treatment device thereof. A concentrated acid tank, a first connecting pipe, a diluted acid tank and a second connecting pipe are used for a pickling process and can also be used for alkali neutralization, water washing and blow-drying. After pickling is completed, the acid storage tank can neutralize residual acid, the pipeline is neutralized by alkali and / or flushed by neutralizing liquid, and under the condition that the pump body design is saved, waste acid discharged by pickling of the evaporator can be returned to the tank for treatment, so that environmental acid pollution is avoided; the reduction evaporator and pickling equipment thereof can be further washed and blown off, so that the corrosion risk is greatly reduced; the service life of a tank pipeline is prolonged by more than 50%, the overhaul cost is reduced, the leakage condition is reduced, and the safety coefficient is improved.

The application provides an ion concentration online monitoring device and method for waste acid regeneration based on the Internet of Things, and relates to the technical field of ion monitoring. The device comprises a monitoring box, a cover plate is arranged on the upper end of the monitoring box, a feeding pipe for liquid supply is arranged in the center of the cover plate, a drain pipe for liquid discharge is arranged at the bottom of the monitoring box, a detection table is arranged at the center of the bottom of the monitoring box, a mounting hole is arranged through the center of the detection table, and a detection mounting column is arranged in the mounting hole in a matched mode. The application combines hardware and software, thereby greatly improving the detection accuracy of ion concentration.

The utility model relates to the technical field of waste acid treatment, and discloses a safe waste acid treatment device which comprises a base and further comprises a treatment barrel located above the base, and the bottom of the treatment barrel is communicated with a liquid discharge pipe through a first electromagnetic valve. According to the waste acid treatment device disclosed by the utility model, a worker can conveniently open a closing cover through the arranged adjusting assembly, so that the worker can conveniently clean the stirring assembly and the interior of the treatment barrel, and waste acid and an alkaline solution can be effectively mixed and stirred through the arranged stirring assembly; according to the waste acid neutralization device, waste acid can be effectively neutralized, so that the neutralization efficiency and effect of waste acid can be effectively improved, waste acid and an alkaline solution can be effectively weighed through a weighing quantitative assembly, manual operation of workers is not needed, the neutralization efficiency of the waste acid is effectively improved, and the workload of the workers is relieved; and the overall practicability and the safety coefficient of the device are improved.

The application discloses a continuous production process and equipment for a trifluoromethylbenzene tower, and belongs to the field of organic fluorine chemistry. The production process comprises the following steps: S1: continuously feeding trichloromethylbenzene and hydrogen fluoride into a tower reactor connected with a heat exchanger circulating cooling system in a reverse direction, so that a three-stage continuous fluorination reaction occurs in the tower reactor to obtain crude trifluoromethylbenzene, and unreacted hydrogen fluoride is separated into liquid at the top of the tower and then flows back into the tower reactor; S2: the crude trifluoromethylbenzene obtained in the reaction is subjected to nitrogen bubbling in a bubble tower, and then is continuously distilled in a rectifying tower to obtain finished trifluoromethylbenzene; and S3: byproduct hydrogen chloride generated in the fluorination reaction is introduced into a hydrochloric acid tank to obtain hydrochloric acid, and the content of hydrofluoric acid in the hydrochloric acid is less than 1000 ppm. The method can greatly improve the utilization rate of raw material hydrogen fluoride, improve the purity of byproduct hydrochloric acid, reduce the generation amount of waste acid, avoid the sharp change of pressure in the reaction process, and realize large-scale, continuous, stable and safe production of trifluoromethylbenzene.

The invention provides a titanium recovery and all-component recycling cooperative treatment method in sulfate process titanium dioxide waste acid. The method comprises the following steps: diffusion dialysis separation, sulfuric acid concentration, metal separation, titanium component recycling, iron and manganese precipitation and precipitation waste liquid treatment. According to the titanium recovery and all-component recycling co-processing method in the sulfate process titanium dioxide waste acid, most free sulfuric acid and impurity ions in the sulfate process titanium dioxide waste acid are removed firstly through the core steps of diffusion dialysis and extraction and / or adsorption, so that a subsequent extraction / adsorption system is converted into a low-acid and low-impurity environment from a high-acid and high-impurity environment, and the titanium recovery and all-component recycling co-processing method in the sulfate process titanium dioxide waste acid is realized. According to the method, the recovery rate of titanium is increased from less than 1% to more than 80%, the efficient recovery of titanium is realized, the recovery of sulfuric acid is realized, high-purity ferric hydroxide and manganese hydroxide products (the recovery rates are both greater than 70%) are produced, and the efficient recycling of waste acid is really realized.

The present invention addresses to a method of removing scale from the DHSV of the oil production string aiming at maintaining the production of the wells and thus avoiding the loss of production. First, a neutralizing solution is placed in the service line, before pumping the scale removing solution through the string to act on the DHSV. Next, the acid is pumped into the production string to react with the calcium carbonate scale. After the time for the dissolution of the scale inside the DHSV, the well is opened for production by the service line. The spent acid is mixed with the neutralizing solution inside the service line, reducing its corrosiveness in relation to the service line, contributing to its preservation.

The utility model belongs to an acid mixing tower for recycling waste acid, which comprises a tower body, a spray pipe extending into the top of the tower body, a granular heavy metal adsorbent placing net cage arranged inside the tower body, a manhole arranged on the side wall of the tower body, a liquid outlet hole arranged on the side wall of the lower tower body, a fluorine / chloride ion separation chamber connected outside the liquid outlet hole, and a fluorine / chloride ion separation membrane arranged inside the liquid outlet hole. The stirring pipe is provided with a liquid circulating pipe, the liquid circulating pipe is connected to an external acid-resistant circulating pump, a liquid outlet pipeline of the acid-resistant circulating pump is connected to the side wall of the tower body at the height of the granular heavy metal adsorbent placing net cage and extends into the granular heavy metal adsorbent placing net cage, and the stirring pipe is provided with a plurality of liquid spraying ports which are spirally arranged. The device has the beneficial effects that spraying and granular heavy metal adsorbent are adopted, the contact area of the spraying and granular heavy metal adsorbent is large, and the stirring pipe sprays liquid irregularly for stirring, so that precipitates fall to the bottom of the tower body and are not accumulated on the surface of the adsorbent, and the adsorption effect is improved.