• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Intimate contacting of plural, physically disparate phases is achieved by establishing a current of axially extending, axially symmetrical helical flow of a first phase; separately establishing a current of coaxially extending, rectilinear flow of a physically disparate second phase, the currents of said first and said second phases being maintained physically separated from each other; circulating and directing said currents which comprise the plural phases to a zone of restricted flow passage with respect to said helical flow, whereby said plural currents converge and are intimately, homogeneously admixed and whereat such zone of convergence the momentum of the first phase helical flow is at least 100 times greater than the momentum of the second phase, coaxial rectilinear flow such as to effect atomization via transfer of momentum, and ultimately effecting phase separation of the product of admixture. Cooling means provided at or contiguous the zone of convergence ensure that atomized particles impinging on the wall members comprising said cooling means are liquefied to form a continuous liquid film thereon, thus effecting the continuous wetting and washing of said wall members and preventing deposition thereon of any encrusting solids.
    公开号:SU982528A3
    申请号:SU792747503
    申请日:1979-04-10
    公开日:1982-12-15
    发明作者:Прюдон Франсуа；Ссиклюна Огюстен；Вердье Жан-Мишель
    申请人:Рон-Пуленк Эндюстри (Фирма)；
    IPC主号:
    专利说明:

    In this way, materials that are very sensitive to temperature can be treated by referring to hot gases, while the substance being treated can only tolerate relatively low temperatures. In this way, for example, it is possible to dry milk using gases with a temperature of the order, while the substance to be treated should not have a temperature above about 80. Another advantage of this method is the ability to proceed with drying and evaporation operations, using uncomfortable devices and very good energy efficiency. This method is used for the concentration of acids, such as sulfuric, phosphoric, and makes it possible to obtain in one step phosphoric acid, expressed in, greater than 60%, i.e. The production of superphosphoric acid is practically known, whereas in the methods known so far they were forced to do this in two stages. However, this process of concentrating is sometimes very difficult due to pollution. For example, in the case of the concentration of sulfuric acid coming from the production of titanium pigments, it is significantly hampered by the presence of iron, which is found during the formation of iron salts. The aim of the invention is to increase the efficiency of the process by increasing the yield of the final product. The goal is achieved by the method of concentrating mineral acids by dispersing acid supplied by an axial flow at a speed of 0.033 m / s, tangential flow of heated air and removal of exhaust gases, cooling the periphery of the contact zone of the liquid and gaseous phases. A device for concentrating mineral acids, ..- containing a housing and a contact head associated with it in the upper part with a tangential outlet nozzle and coaxially mounted perforated shell and axial inlet pipe in it, is equipped with a cooling element located at the point of conjugation of the housing with the contact head, the cooling element is made in the form of a graphite sleeve with circulating channels. The proposed method is not limited to the case of concentrating sulfuric and phosphoric acids, but extends to the case of chromic acid, etching solutions, sheets, etc. and any other solution to be concentrated. FIG. 1 shows a diagram of an apparatus for carrying out the inventive method; in fig. 2 shows an embodiment of the device; in fig. 3 is a diagram of a contact head; in fig. 4 - cooling element. The device includes a contact head 1, a cooling element 2, a housing 3, a cyclone 4, a tank 5 containing a concentrated solution, a filter b. The housing 3 may be made in the form of a cylindrical tube 7. The contact head includes a cylindrical body 8, a perforated shell 9., made in the form of a truncated cone., An axial supply pipe 10 and a tangential nozzle 11 for the gaseous phase. The cooling element contains a graphite coupling 12 in which a liquid cooling system is arranged, made in the form of circulation channels 13. In the following examples, a head with an outer diameter of 270 mm and a height of 120 mm was used, with the diameter of the largest cross-section of the conical perforated sidewall being 166 mm. The cooling element has an external dimension of 130 mm and a length of 66 mm in height. The diameter of the smallest cross section is 24 mm and the angle at the apex of the cone is 90 °. The cooling liquid consists of water with ambient temperature in order to maintain a temperature in the order of the graphite block. Example 1. A solution of pure sulfuric acid is concentrated in the device shown in FIG. 1, but without a cooling element. Inlet temperature 800 ° C. Air: exit temperature air flow rate of 80 m / h at a pressure of 3500 mm water column; fluid flow 46.5 kg / h. From sulfuric acid with a percentage content of 23%, direct production of .6 is 9% sulfuric acid. Example 2. Using the device shown in figure 2, but without; the cooling element is treated with a solution of pure phosphoric acid with 25% in the same conditions of the inlet temperature () and air flow rate (80 cm / h) under a pressure of 350 mm water column with the outlet temperature and fluid flow rate. Get acid with 65%, expressed in. Thus, as it provides for the reorganization theory for pure acids, the resulting phosphoric acid is completely orthophosphoric.
    Example 3. The residual solution of production of TiO pigments, titrated to 250 g / l and 50 g / l of iron is processed in the device shown in FIG. one.
    In this case, rapid contamination of the equipment occurs.
    Then turn on the cooling element (according to the invention) maintained at.
    Other conditions are as follows: inlet temperature 850C, air: outlet temperature, air flow 80 under pressure of 3500 mm of water column; fluid flow 40 kg / h.
    Get a solution containing 1030 g of free and 4 g of iron per liter (or a solution of H SO / titrated 64% free acid). In this operation, iron is easily separated by simple decanting in the form of monohydrate bivalent iron sulfate, which precipitates with increasing concentration.
    Example 4. With the device shown in FIG. 1 and the cooling element at 70 ° C, the solution is processed with pure 25% phosphoric acid under the following conditions: inlet temperature is 800 ° C. Air: outlet temperature 2boc, air flow 80 m / h; fluid flow 40 kg / h.
    Phosphoric acid is obtained with 70% containing 97% of the acid as phosphoric acid.
    PRI me R 5. This example is similar to the previous one, with the exception of the exit gas temperature (). In this case, get acid with 78 Oy, containing 28% of the acid in the form of orthophosphoric.
    Example 6. Handle a solution of sulfuric acid containing 200-300 g / l and 30-60 g / l of iron, enter the air at a temperature of from 750 to 1050 C, using a cooling element with a non-crystiglyllic substance maintained at a temperature of from 50 to 95c The temperature of the gaseous phase is 150-200C.
    Preferably, the inlet temperature is 750-1050 s, the temperature of the non-crystalline substance in the cooling element is 50-95 ° C, and the exit temperature of the gaseous phase is 150-300 s
    The proposed method gives good results also in the case of the concentration of phosphoric acid, since it allows one to obtain concentrations in a single operation above 65% RLO based on a 25% solution.
    Thus, the invention allows, on the one hand, to concentrate the contaminated solutions, which cannot be done differently, on the other hand, to introduce gases at an elevated temperature of about 800 ° C, while maintaining the outlet temperatures also elevated, without risking damage to the linings a priori fragile at high temperature, but used because of their resistance to the chemical action of the reagents. Thus, it is possible to obtain a very concentrated phosphoric acid of more than 65% P-Or
    权利要求:
    Claims (3)
    [1]
    1. A method for concentrating mineral acids by dispersing an acid supplied by an axial flow at a speed of 0.03–3 m / s, a tangential flow of heated air and removal of flue gases, that is, in order to increase the efficiency of the process by increasing the yield of the final product, the periphery of the contact zone of the liquid and gaseous phases is cooled.
    [2]
    2. A device for concentrating mineral acids, comprising a housing and a contact head associated with it in the upper part with a tangential outlet nozzle and perforated shell and an axial inlet pipe coaxially mounted therein, characterized by the fact that it is provided with a cooling element housing housing with contact head.
    [3]
    3. The device according to claim 2, characterized in that the cooling element is designed as a coupling
    from graphite with circulation channels.
    Sources of information taken into account in the examination
    1. French patent 2257326, cl. B 01 F 3/00, 1975.
    -ABOUT
    V FIG.
    类似技术:
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    同族专利:
    公开号 | 公开日
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    LU81130A1|1979-11-07|
    GB2021427A|1979-12-05|
    BE875435A|1979-10-09|
    DK146279A|1979-10-11|
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    IL57021D0|1979-07-25|
    FR2422435B1|1980-08-29|
    BR7902180A|1979-12-04|
    JPS5916481B2|1984-04-16|
    GB2021427B|1982-05-06|
    DK151181B|1987-11-09|
    IL57021A|1982-07-30|
    ATA268379A|1985-02-15|
    CA1120237A|1982-03-23|
    NL7902759A|1979-10-12|
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    ZA791648B|1980-05-28|
    FI74216B|1987-09-30|
    JPS558884A|1980-01-22|
    TR20149A|1980-09-26|
    IT1116168B|1986-02-10|
    DK151181C|1988-07-18|
    AR218772A1|1980-06-30|
    IT7948679D0|1979-04-09|
    AT378694B|1985-09-10|
    GR67714B|1981-09-14|
    AU4562379A|1979-10-18|
    AU523149B2|1982-07-15|
    US4263234A|1981-04-21|
    FI74216C|1988-01-11|
    FI791166A|1979-10-11|
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    引用文献:
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    CN108862223A|2018-09-07|2018-11-23|云南云天化股份有限公司|A kind of effective method for extending the Phosphoric Acid Concentration system equipment cleaning frequency|US1183098A|1910-04-04|1916-05-16|Merrell Soule Co|Desiccating apparatus.|
    FR901089A|1943-03-20|1945-07-17|Metallgesellschaft Ag|Process for concentrating dilute sulfuric acids|
    US2887390A|1953-07-13|1959-05-19|Univ Minnesota|Method and apparatus for spray drying|
    CH322228A|1954-08-11|1957-06-15|Alpura Ag|Device for the heat treatment of liquids|
    US2893871A|1958-11-12|1959-07-07|Blaw Knox Co|Agglomeration process and apparatus|
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    FR1275463A|1960-09-28|1961-11-10|Potasse & Engrais Chimiques|Improvements in granulation and drying of fluid products|
    US3039107A|1961-03-10|1962-06-12|Swift & Co|Agglomeration of spray-dried materials|
    US3211538A|1961-05-31|1965-10-12|Chemical Construction Corp|Concentration of sulfuric acid pickle liquor|
    BE627856A|1962-02-13|
    US3177634A|1962-05-21|1965-04-13|Continental Carbon Co|Apparatus for the recovery of solids from gases|
    GB1027846A|1963-08-07|1966-04-27|Kaiser Aluminium Chem Corp|Improvements in or relating to the mixing or heating of materials with liquids|
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    FR2086574A5|1970-04-02|1971-12-31|Pechiney Saint Gobain|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7810500A|FR2422435B1|1978-04-10|1978-04-10|
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