EP2910315B1 - Self-cleaning tank - Google Patents

Self-cleaning tank Download PDF

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Publication number
EP2910315B1
EP2910315B1 EP15000249.1A EP15000249A EP2910315B1 EP 2910315 B1 EP2910315 B1 EP 2910315B1 EP 15000249 A EP15000249 A EP 15000249A EP 2910315 B1 EP2910315 B1 EP 2910315B1
Authority
EP
European Patent Office
Prior art keywords
self
cleaning tank
circumferential wall
tangential
water
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.)
Not-in-force
Application number
EP15000249.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2910315A1 (en
Inventor
Josef Havelka
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.)
Isotherm sro
Original Assignee
Isotherm sro
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 Isotherm sro filed Critical Isotherm sro
Priority to PL15000249T priority Critical patent/PL2910315T3/pl
Publication of EP2910315A1 publication Critical patent/EP2910315A1/en
Application granted granted Critical
Publication of EP2910315B1 publication Critical patent/EP2910315B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/0856—Cleaning of water-treatment installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/14—Removing waste, e.g. labels, from cleaning liquid

Definitions

  • the invention relates to a self-cleaning tank for the continuous storage of technical cooling water supplied from machine tools of technological facilities and containing waste as solid particles from the processing or machining of materials which have a density greater than the density of water, in particular glass, ceramics, and stone.
  • tanks for storing technical cooling water for machine tools of technological facilities for processing glass, stone, ceramics, and other materials which have a plan view shape of a quadrangle, particularly a rectangle, for the effective utilization of the ratio of occupied floor area to tank volume.
  • Technical water containing particles of material is supplied to the tank. From this tank, the water is pumped into a cleaning device and to a system for cooling machine tools.
  • the disadvantages of the existing designs are that the rectangular shape of the tank prevents sufficient movement of the entire volume of water in the tank and results in the gradual sedimentation of waste particles in the tank, resulting in shutdowns of working lines due to the necessity of cleaning the tank. This leads to a loss in capacity of the manufacturing time of the technological facility. If the tank is not cleaned regularly, this results in the sedimentation of waste particles and the subsequent clogging of the cooling piping that leads water to the machine tools, damaged machine tools, or in the poor processing of products.
  • the object of the invention is to create a self-cleaning tank in which waste is not deposited as sludge from the particles of solid material washed out into cooling technical water after the machining process, which could store the cooling technical water continuously, which would be structurally simple and effective, and which would have low acquisition and operating costs.
  • the self-cleaning tank for the continuous storage of cooling technical water containing particles of solid material consists of an impermeable bottom and circumferential wall.
  • the self-cleaning tank is equipped with at least one fluid inlet and at least one fluid outlet connected to the technological equipment, and at least one fluid inlet and at least one fluid outlet connected to the cleaning device. Simultaneously, each of the outlets is equipped to at least one pump.
  • the essence of the invention consists in that the plan view of the bottom and circumferential wall have a round shape and the circumferential wall is provided with a tangential chamber.
  • the tangential chamber is separated by a dividing partition which lies on the plan view of the circumferential wall and the tangential chamber is formed by tangential walls which extend tangentially to the plan view of the circumferential wall and are connected together at a vertex situated opposite the dividing partition.
  • the means for rotating the volume of stored cooling technical water is arranged in the area of the tangential chamber and is formed by a nozzle extending from a pump whose output is directed in parallel with the circumferential wall of the self-cleaning tank in the direction from the tangential chamber to the self-cleaning tank.
  • the current of water coming from the nozzle continuously supplies the energy needed to create and maintain the circumferential water flow. This maintains a constant circumferential speed of the current.
  • the orientation of the nozzle allows for the seamless fusion of the current of the nozzle with the circumferential current in the tank outside the tangential chamber, therefore not vortices are formed which would interfere with the rotation of the volume of cooling technical water.
  • the plan of the bottom and the circumferential wall is divided into individual arc sectors forming arc angles, wherein the sizes of the vertical sections and dividing barriers is determined by the angles.
  • the size of the diameter of the self-cleaning tank is irrelevant, since the arc rate is always the same.
  • the pump for pumping the cooling water to the system of cooling the technological equipment is located in the middle of the self-cleaning tanks.
  • the pump for discharging the contaminated cooling water to the cleaning device is located in the tangential chamber.
  • the pumps are arranged in the areas of the self-cleaning tank, where the stored water with the required parameters of contamination occurs and which the pumps should suction from the self-cleaning tank.
  • the top of the connection of the tangential walls of the tangential chamber is rounded and the size of the angles defining the size of the vertical interruptions of the circumferential walls of the tank is equal.
  • the optimum for circumferential flow of stored cooling technical water vertical interruptions of the circumferential wall which are the same vertical size.
  • the tank is then usable for both directions of rotation of the cooling water according to the layout of the technological equipment.
  • the output velocity of the liquid at the nozzle of the pump is such that the resulting rotational speed of the volume of the stored cooling technical water is in the desired range for achieving self-cleaning from 0.5 m/s to 2 m/s.
  • the resulting rotational speed of the cooling water is adjusted according to the ratio of the density of the material to the density of the water in order to separate the particles washed out from the processing.
  • the size of the diameter of the bottom of the self-cleaning tank which is governed by the intensity of the contamination of the cooling water, by the size of the technological equipment, and by the available space, is in the range from 1 m to 4 m.
  • the self-cleaning tank in another further preferred embodiment, it is provided with a safety cover.
  • the safety cover prevents personal injury as well as objects being dropped into the tank, which could disrupt the smooth rotation of the volume of stored water.
  • the floor and walls of the self-cleaning tank are made of a material from the group including plastic, steel, stainless steel, and may also be provided with a surface treatment from lacquer, laminate, waterproofing, etc.
  • the advantages of the self-cleaning tank according to the invention include almost zero sedimentation of particles of solid materials contained in the technical water, the possibility of continuous operation of the technological devices, low acquisition costs, easy serviceability, low operating costs, a high quality of relatively clean water discharged to the technological equipment, and the safe operation of the self-cleaning tank.
  • Fig. 1 depicts a functional diagram of the self-cleaning tank and Fig. 2 depicts a plan view of the self-cleaning tank.
  • Fig. 1 depicts a diagram of the self-cleaning tank 1 while Fig. 2 shows a plan view of the same self-cleaning tank 1, used for storing technical water intended for cooling tools of technological equipment that processes particularly stone and glass, therefore generally materials which have a density greater than the density of water.
  • the bottom 2 and the wall 3 of the self-cleaning tank 1 are made of stainless steel.
  • the diameter of the self-cleaning tank 1 is 2000 mm and its depth is 250 mm.
  • a pump 8 that pumps its discharge to a clean water outlet 5 with a low content of solid particles; the outlet 5 is connected to various technological equipment (cutters, grinders, etc.) which need this water for smooth operation.
  • various technological equipment cutters, grinders, etc.
  • the self-cleaning tank 1 is provided with a plastic cover.
  • the self-cleaning tank 1 is fitted on its circumference with a tangential chamber 13 .
  • the tangential chamber 13 is formed by tangential walls 14 which extend tangentially to the plan of the circumferential wall 3 .
  • the tangential walls 14 intersect and form a vertex 15, which, for better hydrodynamic properties, is rounded inside the tangential chamber 13.
  • the tangential chamber 13 is separated by a dividing partition 12, into which from the self-cleaning tank 1 through the output interruption 10 of the circumferential wall 3 there enters a current of rotating stored water.
  • a pump 9 In the tangential chamber 13 there is positioned a pump 9 with an outlet 7 for contaminated water into an external cleaning device and an inlet 4 for the contaminated water from the technological equipment.
  • a means 16 - a nozzle for rotating the volume of stored cooling water In the direction of circumferential flow, in the tangential chamber 13 at the input vertical interruption 11 of the circumferential wall 3, there is arranged a means 16 - a nozzle for rotating the volume of stored cooling water.
  • the nozzle is supplied with water from part of the discharge of the pump 9 of contaminated water and is attached to the self-cleaning tank 1 so that its output current is directed parallel to the circumferential wall 3 of the self-cleaning tank 1 .
  • the volume of stored water rotates in the self-cleaning tank 1 at a circumferential speed of 1 m/s, so the particles of glass or stone with a density approximately 2.5 times higher than the density of water and which are contained in the water are collected by centrifugal force against the wall 3 of the self-cleaning tank 1 , where they are carried by the current until they are suctioned up with the water by the pump 9 into the outlet 7 for contaminated water.
  • the cooling water stored in the central area of the self-cleaning tank 1 can be regarded as clean water, and this technical water is not objectionable for use in associated technological equipment.
  • the size of the vertical interruptions 10 and 11 of the circumferential wall 3 of the self-cleaning tank 1 and the dividing walls 12 may be appropriately determined according to the size of the angle ⁇ , ⁇ , ⁇ of the individual arc sectors whose vertex lies in the center of the tank 1, since with the varying diameter of the tank 1 their size in units of length also vary.
  • the size of the angles ⁇ and ⁇ is 26°, so the size of the vertical interruptions 10 and 11 is 449 mm.
  • the self-cleaning tank according to the invention can be used in operations where technical water is used for cooling processed materials.
  • the water during the processing of the material and prior to being discharged back to the storage tank, washes out the solid waste particles that do not deposit in the self-cleaning tank, so the self-cleaning tank can be continuously used.
  • the operation of the technological equipment does not stop due to tank cleaning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
EP15000249.1A 2014-02-03 2015-01-28 Self-cleaning tank Not-in-force EP2910315B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15000249T PL2910315T3 (pl) 2014-02-03 2015-01-28 Samoczyszczący zbiornik

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2014-77A CZ305337B6 (cs) 2014-02-03 2014-02-03 Samočisticí nádrž

Publications (2)

Publication Number Publication Date
EP2910315A1 EP2910315A1 (en) 2015-08-26
EP2910315B1 true EP2910315B1 (en) 2018-07-18

Family

ID=52462114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15000249.1A Not-in-force EP2910315B1 (en) 2014-02-03 2015-01-28 Self-cleaning tank

Country Status (4)

Country Link
EP (1) EP2910315B1 (cs)
CZ (1) CZ305337B6 (cs)
HU (1) HUE040004T2 (cs)
PL (1) PL2910315T3 (cs)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US386173A (en) * 1888-07-17 white
US2521107A (en) * 1949-01-12 1950-09-05 Robert D Wiley Filtering device
SE404707B (sv) * 1977-11-03 1978-10-23 Soederstroem Gert Vattenmagasinbrunn
US4184967A (en) * 1978-06-22 1980-01-22 Lenox Institute For Research, Inc. Apparatus for clarifying waste water
DE19740061A1 (de) * 1997-09-12 1999-03-18 Grohe Kg Hans Verfahren und Vorrichtung zur Wiederverwertung von Grauwasser
JP4164139B2 (ja) * 1997-11-11 2008-10-08 株式会社ニクニ 液処理装置
US6919033B2 (en) * 2003-10-13 2005-07-19 Royal Environmental Systems, Inc. Stormwater treatment system for eliminating solid debris
GB2423264A (en) * 2005-02-17 2006-08-23 Lorne Entwistle A sludge separator
CZ20912U1 (cs) * 2010-02-18 2010-05-24 Beren Plast, S.R.O. Samonosná nádrž
CZ22341U1 (cs) * 2011-01-28 2011-06-09 Janušík@Tomáš Samonosná válcová nádrž

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
HUE040004T2 (hu) 2019-02-28
PL2910315T3 (pl) 2018-12-31
EP2910315A1 (en) 2015-08-26
CZ201477A3 (cs) 2015-08-05
CZ305337B6 (cs) 2015-08-05

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