Classifications

• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F9/00—Multistage treatment of water, waste water or sewage
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
  • C10B39/00—Cooling or quenching coke
  • C10B39/04—Wet quenching
  • C10B39/08—Coke-quenching towers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
  • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
  • B01D21/267—Separation of sediment aided by centrifugal force or centripetal force by using a cyclone
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
  • C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes

Definitions

• the invention relates to a method for the purification of waste water from a coke quench tower with shortened Auffangbeckenverweilzeit, is used in the water for extinguishing hot coke, and the fire-extinguishing water is collected in a catch basin, which is dimensioned so that this is sufficient for a few deletions , And the extinguishing water passes without a further settling process in a downstream hydrodynamic cleaning device in which the solids are separated by mechanical separation processes of the extinguishing water, so that a space-saving arrangement of the water collecting device without settling is possible.
• the invention also relates to an arrangement consisting of a quench tower, a fire extinguishing channel for transferring the excess extinguishing water into a catch basin, a catch basin, a hydrocyclone, a split filter, and a centrifuge, which serves to separate the solid and the extinguishing water.
• a quench tower a fire extinguishing channel for transferring the excess extinguishing water into a catch basin, a catch basin, a hydrocyclone, a split filter, and a centrifuge, which serves to separate the solid and the extinguishing water.
• a quench tower In the production of coke coal is heated in a coke oven to high temperatures, the volatiles of the coal outgas and collected or burned. After this process coke is obtained, which has a temperature of more than 1000 ° C after coking and is expressed from the coke oven chamber in a designated fire extinguisher. Depending on the type of coal used, the coke contains more or less large quantities of
• the coke In the fire truck, the coke is usually extinguished with water and thereby lowered to a temperature at which it is manageable and can be stored.
• the fire truck is almost all common embodiments along the coke oven chamber front movable in parallel and is usually moved to an extinguishing station or a fire tower.
• An embodiment of a conventional extinguishing method is taught by DE1253669B.
• WO2004096719A1 describes a method for the purification of coking effluent, which is charged with nitrogen compounds, cyanides and sulfides, wherein the coking wastewater contained in a liquid circuit reactor containing at least one inside of an oxygen-containing pressurized gas gas-permeable membrane tube, and on the metrekeitsumströmten Outside of the membrane tube, a biofilm is maintained, in which due to the gas permeability of the membrane tube oxygen-rich inner region, a selective nitrification of nitrogen-containing compounds contained in the wastewater to nitrates takes place and at the same time in a low-oxygen outer region of the biofilm denitrification of nitrates to elemental nitrogen.
• the process allows for the purification of coking plant effluents and
• the extinguishing water first passes into a collecting and settling tank in which the solids can settle and sediment. This process requires a considerable amount of space and time since a large proportion of the solids are very finely divided and therefore sedimented very slowly.
• the extinguishing water thereby obtained is usually not further purified for cost reasons, but is often used without further processing for the next deletion process. Since a part of the finely divided solid is then still present as dust in the extinguishing water, this leads to a renewed deletion process to a significant increase in the burden of dust. For this reason there has been no lack of attempts to improve the efficiency of the settling and subsequent purification steps.
• DE3319435A1 describes a method for the purification of a Kokslöschwasers by a Kokslöschwasserteilstrom, consisting of a settling tank and the drainage of settled solids serving drip, in which two or more tanks are provided, which are alternately acted upon with coke fire water, and each after reaching serve a designated level of solids and after shutting off the water inlet as a drip tray.
• This arrangement allows a barrier of the basin after reaching a certain level and almost complete dewatering of the solid.
• the arrangement has a large footprint due to the multiple arrangement of the pool, and is very time consuming in dewatering the solid.
• An increase in the depth of the basin is not expedient without further measures, since the sedimentation rate is almost constant as the determinant size.
• the invention achieves this object by a method which first collects the excess extinguishing water during coke-quenching in a collecting basin, and transports this immediately after completion of the extinguishing process without further sedimentation or sedimentation process by suitable pumps into a hydrodynamic cleaning device, where it immediately enters Solid and freed of solids water is separated.
• the pumps are designed so that they can also make a promotion of strong solids-containing extinguishing water or a fire extinguishing water suspension without being blocked or damaged by abrasive solids in the solid water suspension.
• a hydrodynamic cleaning device is particularly a hydrocyclone into consideration, which allows rapid separation of an aqueous solids suspension in solid and water.
• the separation of solids and water is carried out so that the solids are removed from the suspension to such a degree that a further use of the purified water for a quenching process without further purification is possible. If desired, however, after the completion of the separation process, further purification of the resulting solid or purified by the hydrocyclone water can be done.
• Claimed is in particular a method for the purification of waste water from a coke quench tower with shortened Auffangbeckenverweilzeit, in the • Coke is squeezed out of a coke oven, placed in a transport trolley while hot, and watered in a quench tower to cool the coke; and
• the excess extinguishing water passes through a transfer device in a water collecting device, which consists of a pool of water as a catch basin, and
• the transfer device is provided with a gradient through which the extinguishing water enters the water basin without further external influence
• the extinguishing water obtained in the pool passes without another settling process in a subsequent hydrodynamic cleaning device in which the solids are separated by mechanical separation of the extinguishing water, so that a space-saving arrangement of the water collecting device without settling is possible.
• the catch basin is arranged to carry out the invention so that this is below the extinguishing tower and the water passes without further promotion in the catch basin.
• the water is passed through a water-conducting transfer device in the catch basin.
• the transfer device is an example of a fire extinguishing channel.
• the cleaning device contains at least one hydrocyclone, by which a separation of the liquid and solid components takes place.
• a hydrocyclone may be used for this purpose, which is used in the prior art for the purification of solids-containing wastewaters and which is well known to a person skilled in the art for the purification of wastewaters.
• An example of a hydrocyclone, which is suitable for adequate and rapid separation of solid and water, is DE102004038125A1.
• An example of an arrangement for the purification of extinguishing water, which contains a suitable hydrocyclone for the separation of solid and water is the US6641721 B2.
• hydrodynamic cleaning device which is not a hydrocyclone, although the latter is the preferred embodiment. It is also conceivable, for example, a slit filter, a sieve or a separator. This depends mostly on the nature of the solid suspension and coke oven plant.
• the collecting container contains a stirring device. This ensures that the solids do not settle in the collecting container. As a result, all the solid for separation in suspension can be added to the subsequent hydrodynamic cleaning device.
• the solid-water suspension is usually added immediately after the deletion process in the hydrodynamic cleaning device.
• the transfer into the cleaning device is preferably carried out by a pump. This must be designed and equipped in such a way that it can promote a solids-laden solid stream, such as those found in ash and dusty coals, even without damage and with an economically viable service life. Suitable embodiments of such pumps are taught by WO2004059173A1 and US4086029A. Of course, the pumps can also be used in multiple arrangements.
• the freed of solids water from the hydrocyclone can be used without further workup.
• the separation is sufficiently high, especially when the hydrocyclones are used in multiple arrangements.
• the water draining from the hydrocyclone or the slit filter is passed into an intermediate container, from which it can be used for a further extinguishing process.
• Slit filters are well known in the art, a common and suitable embodiment teaches US3799354A.
• the water obtained in the cleaning process can be used arbitrarily.
• the water purified in the process according to the invention is used for a renewed extinguishing process.
• the extinguishing water obtained from the split filter for a used renewed deletion so that a very low dust load in a renewed deletion can be achieved.
• the solid obtained in the cleaning process can be used arbitrarily.
• the solid from the hydrocyclone is fed to a centrifuge or dewatering container in which further dehydration of the solid takes place.
• Liquids containers for liquids and solids for storage are possible at any point in the process, with storage containers for liquids usually only be used so that no additional space is required.
• a device for the purification of waste water from a coke quench tower with shortened Absetzbeckenverweilzeit consisting of an arrangement with
• a pump for solid-water suspensions which pumps the solid suspension from the extinguishing water into a subsequent hydrocyclone
• a hydrocyclone which is arranged next to the catch basin and is supplied with the solid-water suspension by a pipeline with a pump from the settling tank,
• a splitting filter in which the water is transferred from the hydrocyclone and through which the water from the hydrocyclone is to be further purified, and
• the invention has the advantage of a space-saving arrangement a cleaning device for Koksofenlöschwasser and in particular the collecting or sales and to allow a time-saving cleaning of the solid-water suspension from the excess extinguishing water of a coke quenching process.
• a coke quenching truck (1) with glowing coke (2) is pushed on a running rail (3) under a quenching tower (4).
• the coke is sprinkled with water after inserting the extinguishing agent (1) into the extinguishing tower (4) from an extinguishing water container (4a) (FIG. 4b).
• the excess, not evaporated water (5a) passes through a fire extinguishing channel (5) in a collecting container (6), which is sufficiently dimensioned for at most one or two deletions.
• This is provided with a stirring device (7), so that the solids do not settle in the coke fire water.
• shut-off device (6a) of the collecting basin (6) is opened and the solid-water suspension with a suitable pump for suspensions pump (8) via a pipe (8a) in a hydrocyclone (9).
• the water (9a) is placed in a split filter (10) where it is completely freed of solids by water pressure (10a). This gives a solids-free water (10b) and the solid, which is discharged via a valve (10c).
• the resulting solid (11a) is placed in a storage container (11).
• the solid (9c) from the hydrocyclone (9) enters a drainage basin (12) and is completely dewatered there.
• the resulting residual water is drained through an outlet port (12a) as well as the dewatered solid (2b).
• the solid (13a) from the dewatering tank (12) is placed in a storage tank (13) and can be used as desired.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Hydrology & Water Resources (AREA)
• Environmental & Geological Engineering (AREA)
• Water Supply & Treatment (AREA)
• Life Sciences & Earth Sciences (AREA)
• Analytical Chemistry (AREA)
• Mechanical Engineering (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Materials Engineering (AREA)
• Physical Water Treatments (AREA)
• Separation Of Suspended Particles By Flocculating Agents (AREA)
• Centrifugal Separators (AREA)
• Treatment Of Sludge (AREA)
• Processing Of Solid Wastes (AREA)
• Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Applications Claiming Priority (2)

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• 2011
  • 2011-11-21 DE DE102011118937A patent/DE102011118937A1/de not_active Withdrawn
• 2012
  • 2012-10-24 IN IN3638CHN2014 patent/IN2014CN03638A/en unknown
  • 2012-10-24 RU RU2014125239/05A patent/RU2014125239A/ru not_active Application Discontinuation
  • 2012-10-24 KR KR1020147016309A patent/KR20140097373A/ko not_active Withdrawn
  • 2012-10-24 WO PCT/EP2012/004435 patent/WO2013075776A1/de not_active Ceased
  • 2012-10-24 EP EP12791087.5A patent/EP2782872A1/de not_active Withdrawn
  • 2012-10-24 US US14/359,418 patent/US20140305884A1/en not_active Abandoned
  • 2012-10-24 CN CN201280066723.0A patent/CN104039712A/zh active Pending
  • 2012-10-24 JP JP2014541550A patent/JP2015502844A/ja active Pending
  • 2012-11-06 TW TW101141170A patent/TW201343235A/zh unknown
  • 2012-11-15 AR ARP120104303A patent/AR088880A1/es not_active Application Discontinuation

Non-Patent Citations (1)

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