EP1761466A1 - Procede et installation d'epuration d'eau - Google Patents

Procede et installation d'epuration d'eau

Info

Publication number
EP1761466A1
EP1761466A1 EP05766118A EP05766118A EP1761466A1 EP 1761466 A1 EP1761466 A1 EP 1761466A1 EP 05766118 A EP05766118 A EP 05766118A EP 05766118 A EP05766118 A EP 05766118A EP 1761466 A1 EP1761466 A1 EP 1761466A1
Authority
EP
European Patent Office
Prior art keywords
water
concentrate
flow
fixed bed
water stream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05766118A
Other languages
German (de)
English (en)
Inventor
Harald Pilz
Tanja Claus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soell GmbH
Original Assignee
Soell GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Soell GmbH filed Critical Soell GmbH
Publication of EP1761466A1 publication Critical patent/EP1761466A1/fr
Withdrawn legal-status Critical Current

Links

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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/688—Devices in which the water progressively dissolves a solid compound
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/01—Density
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/02—Fluid flow conditions
    • C02F2301/024—Turbulent
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/043—Treatment of partial or bypass streams

Definitions

  • the invention relates to a method and a plant for the treatment of water, wherein introduced into a raw water stream by means of metering different chemical substances in liquid form and are mixed reactively therein.
  • composition of the powder mixture is predetermined on the basis of water analyzes.
  • B. CaCl 2 , NaHC0 3 or CAC0 3 , Na 2 C0 3 - are mixed in dry powder form and finally proportionally metered into flowing, reprocessed water (DE 199 15 808 A1).
  • the water is mixed in a controlled manner with the powder mixture and then continued in a substantially steady flow for the duration of a necessary residence time until the desired physical and / or chemical processes have been completed.
  • the quality of the treated water is very good if the amount of powder to be mixed is limited. For larger quantities of powder, in particular smaller amounts of a certain substance can not be distributed reliably and uniformly in the powder mixture. In the water treated with it distinct quality differences occur.
  • a 20% sulfuric acid is added to lower the pH below 2.5.
  • a 20% bisulfite solution is supplied, which is to raise the pH to 8.5.
  • the chemicals are added automatically via appropriate dosing devices. Dosing is in pipe sockets, which protrude transversely from the pressurized sewage conveying pipe.
  • the pipe diameter of the sewage pipes is chosen so that the flow in the pipe can always be turbulent.
  • This system which is intended to allow throughputs of up to 60 m 3 , works extremely unsatisfactorily, in particular in the treatment of pure water described at the outset.
  • the thereby to be metered in proportion to the amount of water small amounts of chemicals do not get proportional to the amount of water flowing into the pipeline and are not evenly distributed therein.
  • the object of the present invention is to provide a method and an apparatus for treating water, especially drinking water, in terms of its properties such as pH, calcium hardness, aggressiveness to metals, taste or the like., By reliable even at very high water flow rates to achieve a good water quality.
  • the device should allow a trouble-free operation.
  • the process has the advantage that the salt-freed, softened water allows trouble-free concentrate formation in the amount that can be metered continuously over a reasonable period of time. Precipitation phenomena or crystallization processes in the concentrate are avoided.
  • Each of the metered concentrates is preferably mixed in the raw water stream immediately after metering so as to ensure even distribution over both the cross-section and a reasonable length of section in the raw water line.
  • the raw water has consistently high quality even with very high water flow rates.
  • This type of treatment for the treatment of desalinated seawater is of great importance. Important areas of application are also seen in the treatment of groundwater or surface water.
  • Counter-current or upward flow has the advantage that the almost completely dissolved particles of the powder or granules are dissolved by a water that still has a high solvent power.
  • the highest concentration is reached only where the freshly added powder of the chemical substance is added. With this procedure prevents crusting of the fixed bed and ensures a long periods of continuous and unhindered treatment of the necessary concentrate in the amount that is necessary for a proportional admixture with the main stream.
  • the choice of chemicals for concentrate formation according to claim 5 is particularly suitable for the treatment of desalinated seawater, but without being limited thereto.
  • This range of chemical substances is also suitable, in a wide variety of combinations, to treat clean surface water, spring or ground water or water coming from cleaning plants to meet the requirements of pH, calcium hardness, taste and aggressiveness towards metallic piping or bodies equivalent.
  • the temporary production of a lower density premix - according to claim 6 - advantageously prevents on the one hand precipitations and crystallization processes and on the other hand facilitates the metering and mixing of the concentrate in the main stream.
  • the operation of claim 7 is particularly suitable for concentrators that are filled with such chemicals that release significant amounts of energy during the dissolution process and heat up very quickly.
  • the preferred formation of a turbulent or fully turbulent flow in the first water stream - preferably immediately after dosing - has the advantage that even small amounts of mostly undiluted, but also dilute concentrate can be distributed very quickly and purposefully in the much larger first water flow.
  • fully turbulent flow is meant a turbulent flow in which the tangential, the radial and the axial flows are effective in approximately equal proportions.
  • Such an embodiment of the device which is particularly advantageous for carrying out the method according to the preceding claims, without being limited to such a procedure, has the advantage that with the low cost of energy for a long time reliable concentrate processing is possible without that certain substances precipitate, clog pipes or crust formation occurs in a chemical substance supply, in particular a fixed bed.
  • the advantageous development of the device according to claim 11, in particular for carrying out the method according to claim 4, has the advantage that a single water flow to be supplied continuously keeps the entire treatment process running.
  • the use of a separate desalination or water softening system alone in such a water flow with a low volume in the area of the secondary line reduces the effort for these steps.
  • the preferred development of the device according to claim 16 makes it possible to carry out a specific premixing process and to improve the distribution of the concentrate in the first water flow.
  • FIG. 1 shows a first embodiment in a possibly most general and simplest form of the treatment device according to the present invention
  • FIG. 2 shows an embodiment of an overall system (device), which is provided inter alia for the treatment of desalinated seawater
  • 3 shows a modified concentrator with a distributor of gravel and with an arrangement for producing a premix in the concentrate storage
  • FIG. 4 shows a sectional view along the line IV - IV in FIG. 3
  • FIG. 5 shows a special design of a mixing device in the main line in FIG FIG. 6 is a left side view of FIG. 5 rotated 90D.
  • FIG. 5 shows an overall system (device), which is provided inter alia for the treatment of desalinated seawater
  • 3 shows a modified concentrator with a distributor of gravel and with an arrangement for producing a premix in the concentrate storage
  • FIG. 4 shows a sectional view along the line IV - IV in FIG. 3
  • FIG. 5 shows a special design of a mixing device in the main line in FIG. 6 is a left side view of FIG. 5 rotated 90D.
  • the first water flow W1 is supplied via the main line 1 from left to right.
  • This first water flow W1 regularly consists of at least prepurified water or water, which is to be supplied from desalination plants or corresponding filter or cleaning plants for recovery as drinking water.
  • a mixing device 2 is arranged, which is arranged downstream of a metering pump 7 in the flow direction of the pressure line 72.
  • a second water flow W2 is supplied via the secondary line 4.
  • This second water flow W2 has a throughput per unit time, which corresponds approximately to the thousandth part of the water flow rate of the first water flow W1.
  • This second water stream W2 leads desalted and softened water, which is free of impurities.
  • This second water flow W2 is guided via a secondary line 4 into a concentrator 6.
  • the concentrator 6 has two chambers. In the first chamber, a so-called. Fixed bed 61 is arranged on a sieve bottom, in which a powdered, granular or lump-shaped, solid chemical substance is maintained.
  • This chemical substance is flowed through or overflowed by the water of the second water stream W2 and forms a corresponding concentrate.
  • This concentrate passes through an overflow 64 in the region of the water level 65 in the concentrate reservoir 62.
  • the pressure tube 72 for the concentrate leads into the main line 1.
  • the pressure tube 72 immediately following is in the stream of Main line 1 is provided a static mixing device 2, which distributes the metered-in concentrate with high efficiency over the entire cross-section of the main line evenly, so that particles of the concentrate are treated in the same consistent throughout the water and with the same properties.
  • a mixing device 2 a provided with two pipe sockets 21, 22 arrangement is used.
  • the pipe sockets 21, 22 protrude coaxially into one another such that on both sides of the central outflow flow via the outflow pipe or the outlet 24 a plurality of annular flows are created, which have alternately different directions.
  • annular flows we find both axial flows and a large proportion of radial and tangential flows. This fully turbulent flow state ensures a uniform and rapid distribution of the metered concentrate over the entire cross-sectional area of the first water flow W1.
  • the basic form of the treatment device and the treatment process illustrated in FIG. 1 documents the minimum equipment of the treatment device of the method.
  • the secondary flow W2 is diverted from the main flow W1. If the main stream does not come from a desalination plant, then it is expedient to first pass the second, branched-off water stream W2 via the secondary line 4 via a softening device 51 and then via a desalting device 52.
  • the softened and desalinated water then passes into three parallel concentrators 6a, 6b, 6c.
  • the water of the secondary line 4 ' is introduced from below into the concentrators 6a, 6b, 6c.
  • the water is distributed over the entire cross-sectional area of the fixed bed 61 and moves in a slow flow up through the fixed bed 61.
  • the concentrate at a low speed of about 1 mm / s 5 mm / s led into a concentrate storage 62 and collected there first.
  • the concentrate storage contains sensors 73 for determining the temperature of the concentrate.
  • a second sensor 74 determines the density and a third sensor 75 determines the pH of the concentrate.
  • the data of the sensors 73, 74, 75 are fed to a control unit which processes the data and the metering pump 7 and the Pump 66 controls such that the water in the main stream W1 receives the required properties with the amount of concentrate supplied.
  • the chemical substance in the fixed bed is always supplied only in such an amount that a sufficiently large distance from the concentrate surface and the upper boundary of the solid in the fixed bed 61 is given. In this way one prevents crusting or any other disturbances in the concentrator 6a, 6b, 6c.
  • the three concentrators 6a, 6b, 6c can be given the same or a different design.
  • the design of the concentrators depends on the chemical substance that is to be processed in each case.
  • the left concentrator 6a is associated with a chemical substance in the form of calcium chloride, the middle concentrator 6b sodium bicarbonate and the right concentrator 6c sodium carbonate.
  • the concentrator 6b prepares a concentrate of sodium bicarbonate. This concentrate is also introduced via a metering pump 7b in the main line 1 and mixed there. A reduction of the temperature or the preparation of a premix are not provided in this case.
  • the concentrator 6c has the same equipment as the concentrator 6b.
  • the mixing device 11 in the region of the main line 1 has a special shape in this case.
  • a profile body 111 which converts the main flow into an annular axial flow, has a central opening 1110, which leads to a smaller liquid flow, into which the pressure pipes 72a, 72b, 72c of the metering pumps 7a, 7b, 7c can be reduced. the.
  • the flow is constricted so that initially creates a kind of funnel-shaped flow, in the center of which are the concentrates.
  • FIG. 4 shows a concentrator 6 which has been modified with respect to FIG. 1 and which is preferably filled with calcium chloride in the fixed bed 61.
  • the secondary line 4 opens into the concentrator 6 at 63 below the fixed bed 61.
  • this second water stream W2 is evenly distributed over the cross section of the concentrator 6 by forming a coarse gravel layer 691 and then a fine gravel layer 692 above it crossed with ascending flow.
  • the fine gravel layer may be covered on its upper side with a sieve bottom, which largely separates the chemical from the fine gravel layer.
  • the chemical in the fixed bed 61 is i. d. R. introduced from above into the concentrator. It must be ensured that a minimum quantity of 611 is always available for the preparation of the concentrate. Consumption amount 612 is renewed periodically from above.
  • an overflow edge 64 ' is provided at a distance above the upper limit of the consumption section, from which the concentrate flows via the overflow edge 64'.
  • Running flap 641 flows into the concentrate storage 62 at low speed.
  • sensors 73, 74, 75 for measuring the temperature, the density and / or the pH are arranged below the liquid level 65.
  • This computing unit 76a, 76b, 76c controls the metering pumps 7a, 7b, 7c and / or the pump 66.
  • the length of the overflow edge is i. d. R. chosen or adjusted so that the amount of concentrate flowing over it flows only at a very low speed of about 1 mm / s to 5 mm / s over it.
  • the position of the overflow edge 64 to the horizontal cross section of the fixed bed 61 of the concentrator 6 With the arrangement of a larger portion of the overflow edge 64 above the center of the fixed bed 61 to reach a nearly symmetrical flow through the fixed bed 61 and thus a uniform consumption of chemical material.
  • the concentrate reservoir 62 To avoid precipitations and crystallization processes in the concentrate reservoir 62, it is expedient to significantly reduce the degree of concentration in the concentrate reservoir 62. Moreover, it is important for the further recycling process of the continuously produced concentrate that the dissolved chemical substance is very quickly distributed over a very large cross section of the first water stream W1. Also for this purpose, it makes sense to dilute the provided concentrate before dosing and mixing in the main line 1. Such a dilution before the metering process via a pump 66 and a pressure tube 661. It is softened and desalinated water, preferably pumped from the secondary line 4 directly into the concentrate storage 62 and mixed there with the concentrate. If necessary, this mixing process can be assisted by a stirrer 67.
  • the overflow flap 641 shown in FIG. 3 preferably extends into the middle region of the cross section of the concentrator 6. supports the uniform flow through the fixed bed 61 in all areas. To fill the fixed bed 61 with new material, this overflow flap can be swung out of the loading area.
  • the effective and rapid mixing of the concentrate (s) after the metering region has a special significance. It is important to create a so-called fully turbulent flow, which should include not only axial and radial components but also tangential components.
  • a further stationary mixing device is shown, which can realize such a fully turbulent flow.
  • This mixing device 3 consists of a housing which encloses a pipe socket 31 of the main line 1.
  • the first water flow W1 opens into the mixing device.
  • the concentrate (s) are continuously metered into the first water flow W1 via the pressure lines 72a, 72b of the metering pump 7a, 7b.
  • annular discs 32, 33, 34, 3x The resulting between the housing of the mixing device and the pipe socket annulus is divided by annular discs 32, 33, 34, 3x into individual annulus sections.
  • a longitudinal wall 35 which extends over the length of the pipe socket, limits these annular space portions in the circumferential direction. Immediately before a circumferentially directed flow reaches the longitudinal wall, the flow is directed through openings in the laterally adjacent annulus section.
  • the radially supplied water flow W1 first strikes the foot region of the pipe socket 31 and follows - as can be seen in FIG. 6 - initially in the clockwise direction the first annular space section around the pipe socket 31. This annular flow is stopped by the longitudinal wall 35 and then through the lateral opening 321 in the adjacent annular disc 32 in an adjacent annulus section. Since the longitudinal wall 35 extends over the entire length of the pipe socket, the flow in the second annular space portion is moved in the counterclockwise direction. At the end of this circulation, the flow of water through the opening 331 in the annular disk 33 is again guided into the adjacent annular space section, where it again arrives in the clockwise direction in the region of the opening 341 of the annular disk 34. This process can be repeated as often as desired, up to an annular disk 3x the
  • so-called dynamic mixers can also be used.
  • z. B mixing circuits with a so-called. Mixing pump or various arrangements with stirrers in a suitably designed mixing vessel.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'épuration d'eau. Il se forme un premier flux d'eau (W1) d'écoulement continu et un deuxième flux d'eau (W2) d'écoulement continu, adouci et dessalé. Dans au moins un concentrateur (6), le deuxième flux d'eau (W2) traverse une substance chimique se trouvant dans un lit fluidisé (61) et produit ainsi en continu au moins un concentré. Le ou les concentrés respectifs sont dosés et mélangés de façon homogène au premier flux d'eau (W1) en continu de telle façon que la quantité de concentrés cédée soit proportionnelle au débit du premier flux d'eau (W1).
EP05766118A 2004-05-22 2005-05-20 Procede et installation d'epuration d'eau Withdrawn EP1761466A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410025259 DE102004025259A1 (de) 2004-05-22 2004-05-22 Verfahren und Anlage zur Aufbereitung gereinigten Wassers
PCT/EP2005/005511 WO2005113451A1 (fr) 2004-05-22 2005-05-20 Procede et installation d'epuration d'eau

Publications (1)

Publication Number Publication Date
EP1761466A1 true EP1761466A1 (fr) 2007-03-14

Family

ID=34972603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05766118A Withdrawn EP1761466A1 (fr) 2004-05-22 2005-05-20 Procede et installation d'epuration d'eau

Country Status (3)

Country Link
EP (1) EP1761466A1 (fr)
DE (1) DE102004025259A1 (fr)
WO (1) WO2005113451A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20096259A0 (fi) * 2009-11-30 2009-11-30 Linde Ag Menetelmä ja järjestelmä prosessiveden käsittelemiseksi
ES2754243T3 (es) 2012-02-02 2020-04-16 Nuvo Residential Llc Sistemas y métodos de tratamiento de agua

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9113971D0 (en) * 1991-06-28 1991-08-14 Boc Group Plc Treatment of water
DE4409192C1 (de) * 1994-03-17 1995-11-02 Aquadosil Wasseraufbereitung G Verfahren und Vorrichtung zur gleichzeitigen Rückspülung und Entsäuerung von Wasser
DE19503613C1 (de) * 1995-02-03 1996-03-07 Anders Rolf Dieter Verfahren zum Aufbereiten von Wasser
ATE251936T1 (de) * 1998-09-18 2003-11-15 Franz-Dietrich Oeste Wirkstoffhaltige fasergebilde, verfahren zu deren herstellung und deren verwendung
DE20011034U1 (de) * 1999-08-20 2000-10-12 Hoelze & Chelius GmbH, 63303 Dreieich Vorrichtung zur Erhöhung der Säurekapazität in Wässern
DE19958648A1 (de) * 1999-12-06 2001-06-07 Brita Gmbh Wasserfiltervorrichtung
DE10223037C1 (de) * 2002-05-22 2003-10-09 Soell Gmbh Verfahren und Vorrichtung zur kontinuierlichen Aufbereitung von Wasser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005113451A1 *

Also Published As

Publication number Publication date
DE102004025259A1 (de) 2005-12-15
WO2005113451A1 (fr) 2005-12-01

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