11results about How to "High fluoride removal efficiency" patented technology

The invention discloses an adsorption coupling contact precipitation defluorination system and a defluorination method, and the method comprises the following steps: feeding fluorine-containing mine water into a defluorination reaction tank, and carrying out adsorption defluorination on the fluorine-containing mine water through a defluorination filter material layer to obtain first defluorination mine water; feeding the calcium agent and the phosphorus agent according to the formula ratio into a fluorine removal reaction tank, removing fluorine through a catalytic reaction to obtain second fluorine-removed mine water, and then feeding the obtained second fluorine-removed mine water into a clean water tank; when the head loss of the second defluorination mine water exceeds a threshold value, feeding backwashing water and backwashing air into a defluorination reaction tank, and backwashing a filter material in a defluorination filter material layer; feeding the regenerated liquid into a defluorination reaction tank, soaking a defluorination filter material layer for 10-12 hours, and then discharging generated waste liquid into a lime reaction tank. According to the method disclosed by the invention, through adsorption, contact precipitation and regeneration, the carbon-based apatite adsorbed with fluorine ions in the defluorination reaction tank is used as a seed crystal for subsequent contact precipitation, so that the service time of a filter material in a defluorination filter material layer is effectively prolonged, and the regeneration frequency of the filter material is reduced.

The invention discloses a treatment process of photovoltaic cell production wastewater, and relates to the technical field of industrial wastewater treatment. Comprising the following steps: treating dilute acid and dilute alkali through a reclaimed water recovery membrane system to obtain first produced water and reclaimed water concentrated water; treating the concentrated acid wastewater and the reclaimed concentrated water through a fluorine-calcium crystallization system to obtain defluorinated concentrated water and calcium fluoride crystals; treating the RO concentrated water and the defluorinated concentrated water by a hardness removal recycling system to obtain hardness-removed concentrated water and second produced water; treating the concentrated alkali wastewater through an alkali recovery membrane system to obtain purified alkali and alkali-removed concentrated water; hardness-removed concentrated water and alkali-removed concentrated water are treated by a comprehensive physicochemical system, and then are sequentially treated by a high-power concentration membrane system and a zero-discharge crystallization system to obtain solid wastes. The photovoltaic cell production wastewater treatment process provided by the invention achieves an economical and feasible zero-emission solution.

A treatment agent for acidic fluorine-containing wastewater and a method for using the same. The treatment agent for acidic fluorine-containing wastewater of the present invention comprises an agent A and an agent B; the agent A comprises carbonate minerals and silicate minerals; the agent B is mainly aluminum salt. The method for using the treatment agent for acidic fluorine-containing wastewater of the present invention comprises the following steps: (1) pretreatment: sedimentation filtration to remove suspended solids; (2) pH adjustment: adding agent A to the acidic fluorine-containing wastewater to make the solution pH 6.5-7.5; (3) coagulation precipitation: adding agent B to the solution, standing and precipitating after reaction, and the supernatant is discharged. The use of the treatment agent for acidic fluorine-containing wastewater of the present invention can effectively improve the acid-base buffering capacity of the water quality, and spontaneously stabilize the pH to 6.5-7.5, with high fluorine removal efficiency. It can also improve the sedimentation efficiency of the fluorine removal alum flower, avoid the use of polyacrylamide, and the treatment process is simple and low-cost.

The present application discloses a regeneration-free high-efficiency carbon-containing aluminum defluoridation agent and a preparation method thereof. The dried sodium metaaluminate powder and nano-oxide are placed in a beaker, an organic acid solution is added, and the solution after stirring is poured into a hydrothermal reactor, subjected to hydrothermal reaction at 140-240° C., the reactor is naturally cooled, a sample in the reactor is taken out and centrifuged, washed once with distilled water, centrifuged again and washed once with ethanol, and centrifuged again and washed once with distilled water; the sample is placed in a vacuum drying oven and vacuum dried at 70-80° C. The sample is placed in a muffle furnace and pyrolyzed to obtain a regeneration-free high-efficiency carbon-containing aluminum defluoridation agent, which does not require chemical agent regeneration and can be repeatedly recycled; in practical applications, the operation complexity and use cost are reduced, while the environmental pollution problem that may be caused by the regeneration process is avoided, and the preparation of an efficient, rapid, low-cost, and non-toxic defluoridation adsorbent is realized, the defluoridation efficiency is improved, and a sustainable solution is provided for solving the problem of excessive fluoride in drinking water.

The invention discloses a coal gangue-based composite fluorine removal agent as well as a preparation method and application thereof, and belongs to the technical field of fluorine removal materials. The preparation method comprises the following steps: mixing the coal gangue with an alkali metal chlorine salt aqueous solution to obtain a suspension, adding a soluble aluminum salt solution at 50-95 DEG C, controlling the pH value to be 8-11, and carrying out a coprecipitation reaction to obtain the coal gangue-based composite fluorine removal agent with boehmite loaded on the coal gangue. During preparation, the coal gangue is used as a carrier, boehmite is loaded on the surface of the coal gangue through a simple coprecipitation method, and therefore the coal gangue-based composite fluorine removal agent is obtained. According to the preparation method provided by the invention, the problems of high fluorine removal cost and easy agglomeration when the aluminum (hydrogen) oxide is independently used as the adsorbent are effectively solved.

The application provides a system treatment process for fluorine-containing wastewater, which comprises the following steps: a fluorine-containing wastewater treatment process, a sludge treatment process, a defluorination filter material regeneration process and a sludge waste liquid treatment process. The system treatment process for fluorine-containing wastewater has the advantages of low sludge yield, low flocculant consumption, low treatment cost, high adsorption capacity, greatly prolonged adsorption time of the adsorbent, reduced regeneration frequency, no discharge of regeneration liquid, and effectively solved problem of difficult treatment of by-products of traditional treatment processes.

The present application relates to the technical field of wastewater treatment, and discloses a deep fluorine removal integrated system for fluorine-containing mine water, which comprises: a raw water supply device for conveying raw water to a fluorine removal device; a medicament supply device for conveying medicament to the fluorine removal device; a bubble supply device for generating micro-nano bubbles; a slag scraping device arranged at the top of the rear end of the fluorine removal device, which is used for scraping off impurities on the upper part of wastewater in the fluorine removal device; a clean water pool in communication with the fluorine removal device; a detection module arranged in the clean water pool and raw water respectively, which is used for monitoring the water quality of clean water and raw water; and a control module electrically connected with the raw water supply device, the medicament supply device, the bubble supply device, the slag scraping device and the detection module. The present application not only improves the fluorine removal efficiency and water quality, but also realizes automatic operation through intelligent control, greatly reducing the complexity and cost of manual operation.

The invention belongs to the technical field of water treatment, and provides a method for deeply removing fluorine in coal mine water, which comprises the following steps: mixing aluminum salt, ferric salt and water to obtain a reagent A; mixing aluminum salt, a polyamine solution and water to obtain a reagent B; adding the reagent A into the fluorine-containing wastewater, and stirring for primary reaction to obtain a mixed solution C; adding the reagent B into the mixed solution C, and stirring for secondary reaction to obtain a mixed solution D; and adding a flocculating agent into the mixed solution D, stirring, then standing and settling, and discharging supernate which is up-to-standard effluent. According to the defluorination method provided by the invention, the dosing control system is adopted in the operation process to realize accurate control of the dosing amount of the defluorination agent, the agent input cost can be reduced, the dosing amount of the agent is reduced by more than 10% compared with that of a conventional defluorination agent, the standard discharge of effluent can be stably realized, and the defluorination method is suitable for industrial production; the defluorination reagent prepared by the invention has the advantages of high defluorination efficiency, convenience in use, low cost and the like.

The utility model discloses deep defluorination equipment with a stage treatment function. The deep defluorination equipment comprises an adsorption tank and a settling tank which is arranged at the bottom of the adsorption tank and is communicated with the adsorption tank, the fluorine-containing wastewater is subjected to composite treatment by the adsorption tank and the precipitation tank, so that the wastewater can be effectively subjected to fluorine removal treatment step by step, the fluorine content in the wastewater is treated to 1.5 mg / L by the adsorption tank, and then the precipitation treatment is performed, so that the fluorine removal effect can be more accurately and efficiently realized; meanwhile, the equipment can be used for continuously treating the wastewater and has the advantage of high fluorine removal efficiency.

This utility model discloses a high-efficiency integrated defluorination device, which includes a first defluorination tank, a second defluorination tank, and a PLC processing module connected in sequence. The first defluorination tank is equipped with a water inlet, a fan inlet, and an openable and closable cover with a sealing structure. Multiple sets of defluorination filter plates are detachably installed inside the tank, with the pore size of the filter plates decreasing progressively along the water flow direction. The tank body is equipped with a water outlet and a first air outlet, both equipped with first solenoid valves. The second defluorination tank is equipped with a defluorination agent tank on the top, with a second solenoid valve between the tank and the tank body. The tank body integrates a liquid level sensor and a bidirectional spiral stirring assembly, with the upper and lower spiral stirring components rotating in opposite directions. A drain outlet with a third solenoid valve is located on the bottom side of the tank body. The PLC processing module is equipped with a touch screen, which can control the solenoid valves and liquid level sensor to realize automated operation of the equipment. Therefore, this utility model effectively solves the problems of low processing efficiency, uneven mixing, and inconvenient operation and maintenance of traditional defluorination equipment.

This invention discloses a combined treatment tank and process for fluoride-containing wastewater, belonging to the field of fluoride-containing wastewater treatment technology. The invention includes a homogenization tank, a high-efficiency inclined plate sedimentation unit, a sludge conditioning tank, and an online influent monitoring chamber. The high-efficiency inclined plate sedimentation unit includes a distribution tank, a mixing tank, a flocculation tank, a sedimentation zone, a sludge zone, a clear water zone, and an effluent channel. This invention uses a combined treatment tank integrating the homogenization tank, the online influent monitoring chamber, the high-efficiency inclined plate sedimentation unit, and the sludge conditioning tank to treat fluoride-containing wastewater. This allows for the combination of various irregular processes into a more regular-looking tank shape, shortening the construction length of sewage pipe networks, improving treatment efficiency, reducing land occupation, and reducing construction and transportation costs. The distribution tank helps balance the influent volume of the treatment system, homogenizes the water quality of the fluoride-containing wastewater, makes the water distribution more uniform, and enables subsequent treatment units to operate stably, improving treatment stability and defluorination efficiency.