MENÜ
During the production of phosphoric acid, part of the fluoride salts contained in phosphate rock is transformed into volatile fluorinated compounds and escapes from the gypsum slurry. The proportion of fluorine going to the gaseous effluents, in dihydrate reaction conditions, is in the order of 5-10% compared to the initial quantity in the rock ...
Details
Venturi + Wet Cyclone Scrubber In some plants a vertical scrubber design is used, either where the risk of solids blockage is minimal or where space is limited and equipment footprint size is critical. Vertical Granulator Scrubber Some Fluorine scrubbers are vertical and, like the above image of a Granulator Tail Gas Scrubber, can have a 1st
Details 
jet gas scrubbing plants with special hot gas quenches, which have the capacity to clean flue gases in this tem - perature range. The quench head is positioned directly in front of the jet scrubber. The hot discharge gas is cooled down to substantially lower temperatures than 100 ºC by spray-ing in scrubbing liquid before the noxious ...
Details 
According to the fluorine-containing tail gas scrubbing device, the Venturi scrubber is combined with the scrubbing tower; a wire mesh demister, a screening plate and an annular scrubbing nozzle are additionally arranged in the tower; a liquid phase part is removed by virtue of the wire mesh demister after the tail gas is scrubbed twice, the ...
Details 
single super phosphate plant. SSP Single Super phosphate Plant Single super phosphate is a highly demanded fertilizer mostly used at the time of preparation of land It comprises of 16 water soluble phosphate which is readily accepted by the crops The …
Details 
phosphate rock with sulphuric acid, fluorine is evolved, mainly as silicon tetrafluoride, along with carbon dioxide and steam. ... liquid to gas ratios in some section of a scrubber will promote -t hi s co 11 e c t ion. (2) The particulate fluorides are small, of the order of 2 ... the plants are able to assimilate the phosphate.)
Details 
The reactions between scrubbing liquid and acid gas are as follows: ... For example, chlorine gas is produced by bleach plants, and fluorine gas is a by-product of semiconductor manufacturing. The halogens are toxic, highly reactive, strong oxidizing agents. These gasses are efficiently controlled by Packed Bed Scrubbers.
Details 
Fluoride emissions must be reduced to 4.6 pounds per hour in order to meet the emission guideline of 0.2 pounds fluoride per ton P Q input. This will be accomplished by removing the Doyle Scrubber £. J and installing a spray-crossflow packed bed scrubber designed for 99.3 percent fluoride removal.
Details 
Fly ash is removed in a wet-scrubbing process in which the waste gas stream is sprayed with aqs. sulphonic or phosphoric acid, depending on which is used in the phosphate extraction plant. At least part of the acid used in the scrubbing is recycled to the phosphate extraction plant. The fluorine cpds are removed afterwards. Fully …
Details 
The invention relates to a method for adsorbing gaseous fluorine on alumina particles. The alumina particles are introduced at the base of an adsorption column through which the stream of gas to be scrubbed flows, the column terminating in a separator where the particles charged with fluorine are recovered. The method is particularly suitable for …
Details 
single Super Phosphate. As a result of reaction, fluorine containing gas is generated and by using a scrubber blower continuously the gases are sucked in closed circuit and sent to gas Scrubbing Section. The produced Single Super Phosphate (SSP) in a semi solid mass is conveyed through a moving reactor called Den and solidify.
Details 
Gas Scrubbing. As part of a fully integrated phosphoric acid production plant, the Prayon gas scrubbing process uses several cross-flow water sprayers to remove these chemicals from the gas. The water bleed from the gas scrubber can therefore be entirely used in the plant, usually ending up as cake washing water at the filtration section. As a ...
Details 
Processes for eliminating fluorine contamination of surface waters, and other pollution, by fluorine compounds from phosphate plants, and for recovery of fluorine as hydrofluosilicic acid. The processes involve the separation of fluorine compounds from waste gases by absorption-desorption with NaF, BaF2, or KF, and absorption of SiF4 in water.
Details 
Criteria are presented for a horizontal cocurrent spray nozzle scrubbing system designed to remove fluorine and hydrogen fluoride from the 3000 cfm of ventilation air passing through the Volatility Pilot Plant. A reduction of fluorine concentration from 1520 to <2 ppm during a total release of 68 lbs, and a reduction of hydrogen fluoride ...
Details 
At least part of the acid used in the scrubbing is recycled to the phosphate extraction plant. The fluorine cpds are removed afterwards. Fully recoverable H2SiF6 can be produced with a controlled concn. of 18-30% whilst dust is effectively removed Process control, maintenance and plant cleaning are easy.
Details 
Fluoride injury has always been a problem to vegetation growing in the vicinity of super-phosphate plants and the literature carries such reports back to 1890. The rock mineral (Apatite) from which super-phosphate is made is high in fluorides; and acids containing fluoride are, in fact, made from these same mines. Calcium Compounds are Answer
Details 
' In at least one plant, the process gas is not treated to recover fluorides prior to final scrubbing; and the resulting scrubbing water is cooled in a closed-loop cooling tower 21 without caustic treatment. 4.2.2 Revised Scrubbing System for DAP Production A revised scrubbing system is used to control fluoride emissions from DAP production at ...
Details 
and reaction kinetics. In addition, the scrubbing and stripping process was investigated. When a 2 mol/L sodium hydroxide solution ([NaOH]) was used as the stripping agent with a phase ratio (O/A) of 1:10, a stirring speed of 200 rpm, and a reaction time of 30 min, a maximum stripping ratio of 90.1% was obtained. 1. INTRODUCTION
Details
Jan 01, 2016· HF is infrequently produced from FSA. HF has the least easy logistics of the fluorine products described. It is an extremely hazardous and corrosive gas. It can also be sold in aqueous form. In either form HF requires a trained transport crew, special transportation equipment and permitted unloading facilities.
Details 
acid plants include venturi, wet cyclonic, and semi-cross-flow scrubbers. The leachate portion of the fluorine may be deposited in settling ponds. If the pond water becomes saturated with fluorides, fluorine gas may be emitted to the atmosphere. The reactor in which phosphate rock is reacted with sulfuric acid is the main source of emissions.
Details 
The fluorine compounds liberated during the acidulation of phosphate rock in the manufacture of phosphoric acid and fertilizers are now rightly regarded as a menace, and the industry is now obliged to suppress emissions of fluorine-containing vapours to within very low limits in most parts of the world. As with any pollution control operation, it is …
Details 
A fluorine gas manufacturing plant wherein F 2 is manufactured by the electrolysis of KF/HF compositions. The plant comprises skid modules for: HF storage, the electrolytic cells, storage and purification of the manufactured F 2 raw gas, for fluorine gas delivery including a single buffer tank or multiple storage units, scrubbers to provide purified …
Details 
Feb 01, 2022· Despite a strong demand for fluorinated molecules in the pharma and agrochemical industry, the production of fluorinated compounds is often outsourced to specialized laboratories. This is likely the result of safety concerns in handling hazardous fluorinating reagents, alongside the lack of expertise and equipment. Continuous flow …
Details Telif Hakkı © 2023 Artom Industry & Technology Group Co., Ltd.
