• 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:
    1519365 Degreasing rolling mill scale HOESCH WERKE AG 20 July 1976 [22 July 1975] 30069/76 Heading C1A [Also in Division C5] Grease is removed from rolling mill scale by mixing the scale with 10-20% of solvent (e.g. CFCl 3 ), continuously distributing the mixture in a solvent bath, removing the treated mill scale while treating it countercurrently with fresh solvent, draining off the latter, separating residual solvent and drying the mill scale, regenerating the solvent from the grease-containing solvent by distillation and recycling the solvent. Apparatus is described.
    公开号:SU786920A3
    申请号:SU772390153
    申请日:1977-10-17
    公开日:1980-12-07
    发明作者:Барке Людвиг
    申请人:Хеш Верке Аг (Фирма)；
    IPC主号:
    专利说明:

    (54) INSTALLATION FOR CLEANING THE ROLLED EQUAL SOLUTION
    one
    The invention relates to cleaning mill scale with a solvent and can be used in the metallurgical industry.
    A known device for cleaning metal chips, containing a metering device with a chip bin, located in the washing baths, transporting augers and means for drying 1.
    The disadvantage is that mill scale with a pore volume of up to 50% in this installation cannot be cleaned, because the pores are filled during treatment with a washable solution that goes along with the material to be treated, which is undesirable from the point of view of environmental protection. ,and
    and also uneconomical.
    A solvent scale mill cleaning unit is also known, comprising a metering unit with a scale bin, two inclined transporting jaws, one of which is installed at one end in a solvent bath, a scale scrubber and a device for regenerating a solvent 2.25
    The disadvantages of this installation are pollution of the environment with organic solvents and low quality of cleaning.
    权利要求:
    Claims (10)
    [1]
    The aim of the invention is to improve the quality of cleaning and reduce environmental pollution. This goal is achieved by the installation of a hermetic casing, a horizontal two-roll mixer located under the dosing device, a solvent supply device for the transporting auger located in the solvent bath, hot water, a water separator and a tank for collecting purified scale, while the twin-roll mixer has a solvent supply unit mounted at the exit from the outlet funnel located above the bath for the solvent, and the discharge end of the transporting auger located in the bath FOR the solvent is connected to the device FOR treating the scale with solvent vapors, made in the form of a spiral elevator, the output end of which is located above the bath for hot water, with This end of the other transporting shnek is located in the hot water bath, and the other end is connected to the water separator and the tank for collecting the cleaned scale, and the device for regenerating the solvent and Means for distillation and condensation.  The solvent vapor descaler has additional spiral elevators, and the discharge end of the conveying auger located in the solvent bath has a resettable hopper for alternate connection with spiral elevators.  The installation is also equipped with a solvent sump, and the solvent bath has means for delivering the contaminated solvent to a solvent sump, which is connected to the solvent feeder by means of a pump.  Moreover, the settling tank for the solvent is connected to the means for distillation by means of a pump.  In addition, the installation has a heat exchanger, and the hot water bath has a water supply device connected to the heat exchanger and overflow with a filter.  The condensation means has a condenser connected to a heat exchanger through condensate pipes, one of which has a reducing valve, and a compressor connected to the condenser through a steam pipe and to a heat exchanger, while the second condensate pipe is connected to an oil trap.  The distillation agent has a condenser, a compressor connected to it, a film evaporator connected by means of a pressure reducing valve to a condenser, a forced circulation evaporator, and two end-connected evaporators with vacuum devices connected in parallel, the film evaporator connected to a heat exchanger through a flash steam pipe. a spiral elevator and a forced circulation evaporator, which is connected to two parallel-connected end evaporators and a heat exchanger.  The installation has a catching funnel mounted above the conveyor screw located in the solvent baths, in which condensers of means for distillation and condensation are installed.  The water separator has a drain line connected to the hot water bath.  The installation is also equipped with a sump for water with an overflow part and a trasporting device, the lower part of which is made in the form of a magnetic magnetic conveyor located in the overflow part of a sump for water, while the tank for collecting purified scale has a discharge bin located above the conveyor device and connected to sump for water.  The latter is connected to a sedimentation tank for the solvent.  In addition, the installation has prefabricated tanks, and the baths for solvent and hot water have drain valves located above the prefabricated tanks.  FIG.  1 schematically shows the proposed installation; in fig.  2 - part of the device for the regeneration of the solvent.  The installation contains a metering device with a hopper 1 for scale, two inclined conveying augers 2 and 3, a screw 2 located in the solvent bath 4, a device 5 for processing the scale with solvent vapors, a solvent recovery device with means for distillation and condensation, a case 6 , a horizontal two-roller mixer 7, a device 8 for supplying a solvent to the transporting pups 2, a bath 9 for hot water, a water separator 10, a tank 11 for collecting the cleaned scale.  The twin-roll mixer has a solvent supply unit 12 and a drain funnel 13 mounted in the opening of the casing 6 and through which the solvent bath 4 is filled to level A.  The solvent vapor treatment device 5 is designed in the form of a spiral elevator, which has a hollow vertical column 14 with holes 15 for solvent evaporation and coils.  The upper turns have slit holes to which the drain pipe is connected to the conveyor auger 2.  At the same time, the device for treating the scale with solvent vapors has additional spiral elevators, and the transporting pups 2 has an adjustable bunker 16 for alternate connection with spiral elevators and an actuator 17.  The chute 18 of the conveying screw 2 has a fitting 19 for removing sediment.  Transporting a screw 2 is mounted on supports 20, and a spiral elevator - on springs 21.  The solvent bath 4 has a means 22 for supplying the contaminated solvent with an oil filter 23 and a pipe 24 to a solvent sump 25 located below the transporting auger 2 and connected to the device 12 for long.  supplying the solvent through the pump 26, and with the means for distillation through the pump 27.  The hot water tank 9 has a device 29 for supplying water and an overflow means 30 with a filter 31 and a pipe 32 connected to the heat exchanger 28.  Transporting the bugs 3 mounted in the supports 33.  The chute 34 of the conveyor bag 3 has a drain fitting 35, and the water separator 10 has a conduit 36 for draining into a bath 9 for hot water and a drain chute 37.  The heat exchanger 28 is connected to the device 29 for supplying water through the pump 38.  The condensation means has a condenser 39, condensate pipes 40 and 41, a reducing valve 42, a compressor 43, a steam pipe 44, the pipe 41 being connected to the oil trap, and a compressor 43 with a heat exchanger 28 through the pipe 45.  The distillation agent has a condenser 46, a compressor 47, a steam pipe 48, a branch 49 of pipe 48, a film evaporator 50, a reducing valve 51, a forced circulation evaporator 52, two parallel connected end evaporators 53 with a vacuum device and a mixer 54 each.  The film evaporator 50 has an outlet 55 and an evaporation chamber 56, which is connected via port 57 via a pump 58 to the evaporator of forced circulation 52, pipe 59 with condenser 46 and pipe 60 with spiral elevator 5.  The pipe 61 of the evaporator forced circulating and 52 is connected to the capacitor 46.  Capacitors 46 and 39 are located in the catch funnel 62.  The forced circulation evaporator 52 is connected via a pump 63 to two end-evaporators 53 connected in parallel, each of which has an electric heating jacket 64.  Two-roll mixer 7 and the chute 18 of the transporting screw 2 have heating jackets, for example, electric.  The bath 9 for hot water and the chute 34 are thermally insulated.  A suction device 65 is installed above the two-roll mixer.  The tank 11 for collecting the refined scale has a discharge bunker 66, made in the form of a double metal jacket, 67 of which are internally perforated and external by means of the willow pipe 68 oyoediene: with a sump 69 for water, which is connected via pipe 70 to a sump 25 for solvents.  In the alternating part 71 of the water settler, the lower part of the transporting device 72 is located, made in the form of a magnetic magnetic trap 73.  The second part 74 of the sump 69 by means of the pump 75 and the pipe 76 is connected to the conveyor screw 3.  The installation has collection tanks 77 and 78, respectively, for solvent and water.  Above the spiral elevator 5 and the bath 9 for hot water is located a pipe 79, which branches from pipe 59 and goes to wall 80 and back to condenser 46.  The dispensing chute 81 of the metering device is sealed to a two-shaft mixer, which is rotated by a drive 82.  The installation works as follows.  After lubrication and sifting of grains with a diameter of less than 8 mm, the moistened mill scale, coated with grease, is directed through a metering device with a hopper 1 and a chute 81 to a twin-roll mixer 7 rotating from an actuator 82.  In a two-roll mixer, the scale is mixed with 10-20% of solvent, thus forming a fine-grained agglomerate with a high content of fat, a fairly good distribution of fat in the mixture is carried out.  Through the bleeder,.  13, mill scale is continuously fed to a solvent bath 4 having a depth.  11, 5 m, where, during settling, it is distributed in a solvent.  The conveying screw 2, located in the chute 18, feeds the scale from the solvent bath at low speed and strong agitation at an acute angle to the top.  Upstairs, a fresh solvent, containing no oil, is fed in countercurrent to the scale transported by the screw 2 from the device 8 for supplying the solvent.  Due to the constant flow of the solvent into the bath 4, the solvent containing a 1st lubricant, through the means 22 for supplying contaminated solvent and the oil filter 23 through pipe 24 enters the settling tank 25 for the solvent, which is especially necessary to compensate for variations in the amount of solvent during subsequent steps. its regeneration.  From the transporting auger 2, through the adjustable hopper 16, scale is fed through a spiral elevator to the top, towards which flows the solvent, which has been dried and distilled.  At the same time, the solvent is condensed on the scale and heats it.  The condensable solvent returns through the slit openings of the upper turns of the spiral elevator along a drain pipe (not shown) to the transporting screw 2.  Scale feed rate is adjustable.  The degreased scale from the upper end of the spiral elevator 5 is discharged into a bath 9 for hot water, in which, by further heating the scale to approximately 40-45 ° C, the residue of the solvent is released.  From the bath 9 the conveyor screw 3 serves balkin to the water separator 10 (water separating grate), the water from which flows through conduit 36 to the bath 9 for hot water.  From the water separator 10, the dross through the discharge chute 37 enters the tank 11 for collecting dross and, through the discharge bin 66, the dross free from water droplets enters the transport device 72, for example, a conveyor belt.  Through the holes of the shirt 67, the water through the drain pipe 68 flows into the sump 69.  Scale particles flowing along with the water are retained in the overflow part 71 of the water settling tank and the magnetic belt conveyor 73 is fed to the conveying device 72.  The water deposited in the settling tank 25 for the solvent is continuously removed through conduit 70 and sent to the settling tank 69 for water.% Of the solvent containing lubricant and collected in the settling basin 25 by pump 26 is fed into the solvent supply unit 12 of the double-roll mixer 7.  The main part of the solvent containing the lubricant from the settling tank 25 for the solvent is supplied continuously by som 27 through the outlet 55 to the evaporator 50 of the means for distillation.  Water collected from the second part 74 of the settling tank for water is pumped through line 76 to pump auger 3 by pump 75.  In the above example, chlorofluorocarbon fluoride, namely, fluorine methane trichloride (CFCl2) having a pressure of 760 mm Hg is used as a solvent. Art.  Penalty point is 23.8 ° C at 20 ° C, and density is 1.49 h / cm. Due to the low boiling point of this solvent, residues still present in the scale thrown into the hot water bath can be removed from the spiral elevator 5 by simple way with further heating scale.  To heat the scale, hot water with a temperature of 50-60 ° C is used, which is constantly pumped into a hot water bath to a height B through device 29 for supplying water by a pump 38 connected to a heat exchanger.  Excess water through filter 31 of overflow means 30 is again directed through conduit 32 to heat exchanger 28 for preheating.  The scale, supplied by the transporting bob 3 to the water separator 10, is freed from lubricant and solvent.  The entire space in which the dross is treated is compacted from atmospheric pressure, namely at the beginning of the cleaning stroke due to the moistened oily scale in the dosing device, and at the end of the treatment process due to the walls 80 of the casing 6 immersed in water in the bath 9.   retention of a slight vacuum from -1 to 3 mm of water, Art.  In the installation and in the reduction of losses due to solvent leakage, suction devices are used, the main one being the suction device 65.  In the film evaporator 50, the main amount of solvent is released about oil and grease. To do this, as a heater to the n-ribbon evaporator 50, compressor 47 is supplied via pipe 48 with refrigerant steam at a temperature of about 55 ° C.  The refrigerant condensed in the film evaporator 50 flows to the condenser 46 through line 59 through the pressure reducing valve 51.  Obtained in the condenser 46 refrigerant vapor enters the compressor 47.  The solvent vapor condensed in the condenser 46 is trapped in the sensing funnel 62 and the solvent supply unit 8 is fed to the scale transported by the screw 2.  The solvent vapor, separated from the lubricant in the film evaporator 50, from the evaporation chamber 56 through conduit 60 enters hollow columns of spiral elevators 5.  The solvent vapor evaporates from the openings of the hollow column and partially condenses on the upwardly fed cold slag, which is heated.  Most of the solvent is condensed in capacitors 46 and 39.  The supersaturated solvent from the film evaporator 50 containing from 3 to 6% oil or lubricant through chamber 56 and fitting 5T is pumped into the forced circulation evaporator 52, in which the oil at a temperature of 45 ° C is concentrated to a content of 70-75% and the resulting the solvent is led through conduit 61 to condenser 46 and is condensed there, after which it is caught in a catching funnel 62. The heating medium to the forced circulation evaporator 52 is supplied by a compressor 47 through a branch 49 of the pipe 48. , While in the first and second stages the separation of the solvent from the oil in the film evaporator 50 and in the evaporator of the circulating circulation 52 is carried out continuously, the final separation is carried out in portions.  From the evaporator of forced circulation 52, the pump supplies 63 parts of the oil to two parallel-connected final evaporators 53.  The final evaporator 53 is heated up to, and to obtain a vacuum of 35 - 45 mm Hg.  Art.  include a vacuum unit and an agitator drive 54.  The residue of solvent, formed when the oil is processed under vacuum in the final evaporator 53, is directed to the condenser 46, and after condensation to the attractive funnel 62.  The oil, almost solvent-free, is drained from the final evaporator 53 and collected in a heat-insulated (heated) tank (not shown).  From there it is sent for later use.  Solvent evaporation may condense in line 79.  If the installation is stopped, for example, for repairs, then it is necessary to release the solvent, solvent and hot water from the installation through fittings 19 and 35.  The solvent collecting tank 77 is provided with a cooling device for condensing the solvent in a half body and cooling the liquid solvent.  A cut of the hot air 78 to collect hot water is provided with a heating device so that the hot water leaving bath 9 through valve 35 maintains the desired temperature.  At the start-up of the installation by pumps (not shown again from tanks 77 and 78 respectively, solvent and hot water are supplied.  The proposed plant provides high quality of scale cleaning, which allows re-use of mill scale as a contaminant, for example, in a sinter plant or a steel-smelting furnace, and lower environmental pollution in the process of mill scale degreasing.  Claim I 1.  A solvent scale mill for cleaning mill scale containing a dosing bin with a silo bin, two inclined transport holes, one of which is installed at one end in the body solution bath, a device for treating the scale with solvent vapors and a solvent regeneration device that is different from In order to improve cleaning quality and reduce environmental pollution, it has a sealed casing, a horizontal two-roll mixer, a device for supplying the solvent to the transporting bug located in the solvent bath, hot water bath, water separator and tank for collecting the cleaned scale, while the two-roller mixer has a solvent supply device with a drain funnel mounted above it, located above the solvent bath, and the discharge end of the transporting screw located in the solvent bath is connected to the device for treating the scale with solvent vapors, made in the form of a wide grazing silo, The tip of which is located above the hot water bath, while the end of the other conveyor jaw is located in the hot water bath, and the other end is connected to the water separator and collection tank for cleaned eared, and the solvent recovery device has means for distillation and condensation .  
    [2]
    2. Installation according to claim 1, characterized in that the solvent vapor descaling device has additional spiral elevators, and the discharge end of the transport screw located in the solvent bath has a resettable bunker for alternate connection with spiral elevators.
    [3]
    3. The installation according to claim 1, wherein it is provided with a sump for solvents, and the solvent bath has means for delivering the contaminated solvent to the sumps for the solvent, which is connected to the feeder solvent by pump.
    [4]
    4. Installation on PP. 1 and 3, characterized in that the settling tank dp solvent is connected to the means for distillation by means of a pump.
    [5]
    5. Installing pop. l, otslncha. due to the fact that it has a heat exchanger, and the dp hot water bath has a water supply device connected to the heat exchanger and overflow means with a filter.
    [6]
    6. Installation on PP. 1, 4 and 5, so that the condensation means has a condenser connected to a heat exchanger through condensate pipes, one of which has a reduction valve, and a compressor connected to a condenser through a steam pipe and heat exchanger , while the second condensate piping is connected to the oil trap.
    [7]
    7. Installation on PP. 1 and 5, that is, that the means for drying has a condenser, a compressor connected to it, a film evaporator connected by means of a pressure reducing valve to a condenser, a forced circulation evaporator and two parallel connected end evaporators with vacuum devices, while the film evaporator is connected to the heat exchanger, through the evaporation pipe - to the spiral elevator and to the forced circulation evaporator, which is connected to two parallel connected end evaporators ate E and teploobmenshkom.
    [8]
    8. Installation on PP. 1, 6, and 7, so that it has a catching funnel mounted above the conveyor screw located in the solvent bath, in which condensers of dp means distillation and condensation are installed.
    [9]
    9. Installation according to claim 1, characterized in that the water separator has a drain line connected to a hot water bath.
    [10]
    10. Installation according to claim 1, characterized in that it is provided with a sump of water bottoms with an overflow part and a conveying device, the lower part of which is made in the form of a tape magnetic conveyor located in the overflow part of the sump for water, while the tank for collecting the cleaned The dross has a discharge bunker located above the transporting j device and connected to a sump for water.
    I. Installation on PP. 1, 3 and III, that is, that the sump for solvents is about 1 liter connected to the sump for water.
    12. Installation on PP. 1-11, characterized in that it has collection tanks, and solvent and hot water baths have drain valves located above the collection tanks.
    Sources of information
    taken into account in the examination
    1. USSR Author's Certificate No. 375325, cl. C 2: 3 G 5/04, 1970.
    2. USSR author's certificate number 74343, cl. C 23 G 3/00, 1947 (prototype).
    .
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    同族专利:
    公开号 | 公开日
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    JPS5213433A|1977-02-01|
    JPS599604B2|1984-03-03|
    AU1574176A|1978-01-12|
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    SE7606545L|1977-01-23|
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    NO143355B|1980-10-13|
    CA1076003A|1980-04-22|
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    引用文献:
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    US4288329A|1979-11-09|1981-09-08|Duval Leonard A|Method and apparatus for cleaning fine waste material mixed with oil and water|
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    法律状态:
    优先权:
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