EP3162464A1 - System zur rückgewinnung von wärme aus erstarrenden grossen metallgussstücken und zur verwendung davon zum beheizen von giessformen - Google Patents

System zur rückgewinnung von wärme aus erstarrenden grossen metallgussstücken und zur verwendung davon zum beheizen von giessformen Download PDF

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Publication number
EP3162464A1
EP3162464A1 EP15460117.3A EP15460117A EP3162464A1 EP 3162464 A1 EP3162464 A1 EP 3162464A1 EP 15460117 A EP15460117 A EP 15460117A EP 3162464 A1 EP3162464 A1 EP 3162464A1
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EP
European Patent Office
Prior art keywords
conduit
air
water
tank
heat
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.)
Granted
Application number
EP15460117.3A
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English (en)
French (fr)
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EP3162464B1 (de
Inventor
Krzysztof Piotrowski
Andrzej Zegartowski
Piotr Mirek
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Krakodlew Spolka Akcyjna
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Krakodlew Spolka Akcyjna
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0056—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for ovens or furnaces
    • F28D2021/0057—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for ovens or furnaces for melting materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0077—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for tempering, e.g. with cooling or heating circuits for temperature control of elements
    • F28D2021/0078—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for tempering, e.g. with cooling or heating circuits for temperature control of elements in the form of cooling walls

Definitions

  • the object of the invention is a system for recovery of heat from solidifying large-size metal castings and for using it to heat casting moulds.
  • Sand casting moulds made on the basis of certain resins, for example furan are characterised by a high moisture of surfaces, which results from the presence of a large amount of hydrogen isolated as a result of chemical processes of binding a resin and a hardener, taking place in the mass. Presence of moisture in the mould negatively affects the casting process.
  • a system for recovery of heat from a refrigerating circuit which can be used in refrigeration and food industries, in municipal and other installations, is known.
  • This system consists of a refrigerating circuit with an exchanger assembly connected thereto which receives heat from overheated ammonia vapours, a receiving installation for water after heating, and an intermediate tank located therebetween.
  • the exchanger assembly has, at the input of the refrigerant, a first pressure sensor and a second control valve, and at the output - a third control valve and a second pressure sensor, and a bypass conduit of the refrigerant and an installed first control valve.
  • At its output there is a condenser connected to a main tank for condensates.
  • the refrigerating circuit is connected, at the output of the second pressure sensor, to a straight-through tank which is connected to an intermediate tank for refrigerant condensates and to the bypass conduit.
  • the intermediate tank Between the exchanger assembly and the receiving installation for heated water, there is the intermediate tank. It has a gas space connected to the external atmosphere by means of a conduit on which a flow measuring element is located. Water part is determined by the maximum and minimum water levels for implementation of which two sensors are used.
  • This tank is connected, with its gas space, to the exchanger assembly included in the refrigerating circuit, and at the output of the exchanger and at the input of the intermediate tank, there is a first temperature sensor and a first ammonia concentration sensor.
  • a first pump assembly Between the output of the intermediate tank and the receiving installation for heated water, there is a first pump assembly, bypassed with a sixth control valve. At its input, there is a second ammonia concentration sensor, and at the output of the first pump assembly, there is a fourth check valve.
  • the receiving installation for water after heating includes a second exchanger assembly.
  • the input of this assembly of the receiving installation for water after heating is connected, by means of a fourth control valve and a second check valve located at its output, to the conduit of water before heating.
  • a mixing device and a second temperature sensor At the output of the traditional heating medium, an eighth control valve is located.
  • an eighth control valve At the input of the mixing device, between the conduit of water before heating, there is a ninth control valve and a fifth check valve.
  • the entire system has a control device - processor. It is connected to two fault indicators: one based on sound and the other on light, as well as to the control valves, to the sensors and to the first and second pump assemblies.
  • patent specifications: CN203817349 , WO2014105720 , CN202639324 , CN201988714 , KR20030049961 show various devices for heat recovery in casting processes, but they do not disclose any devices for using the recovered heat. Structures of these devices contain a heat exchanger, a tank for the heated fluid, pipe conduits, valves, temperature sensors, but their structures significantly differ from the structure of the device disclosed by the present specification and drawings.
  • the essence of the invention consists in that at the input of the system, a ventilator is mounted, which is connected to a vertically circulating air conduit: system - atmosphere, an arm of which is connected to the heat exchanger and constitutes an air outlet into the atmosphere.
  • a second arm of the air conduit is connected through the heat exchanger to a conduit of hot mixture: air - water vapour, connected with the other end to a heater outlet of the casting mould.
  • a water pump, mounted in the system is connected to a tank of working medium, and via its second pipe branching, it is connected to the heat exchanger which, through a peak load boiler, is also connected to a pipe conduit of hot air.
  • a jet pump In the conduit of hot air, a jet pump is included which is supplied from the water conduit the other end of which is connected to a pouring tank of the casting mould.
  • control valves and a metering valve are included, which are electrically connected with a multi-strand cable to an electronic control module.
  • one control valve is mounted, at the connection of the air conduit: system -atmosphere, to the ventilator.
  • control valve is mounted at the separation place of the air conduit.
  • control valve is mounted at the connection of the conduit of hot air.
  • control valve is mounted at the connection of the conduit of hot mixture: air -water vapour.
  • the metering valve is mounted on the water conduit before the jet pump.
  • the pipe conduit of hot air is flexible.
  • the pipe conduit of cold mixture air-water mist is flexible.
  • the pipe conduit of hot mixture air - water vapour is flexible.
  • An advantage of the solution described above is its universality in use since one device performs two processes to a large extent technically opposed in relation to each other.
  • the device itself is relatively simple, easy to use and practically failure-free.
  • Fig. 1 is a schematic diagram
  • Fig. 3 an isometric view with a partial cross-section of the casting mould of the system implementing the function of cooling the casting and recovering the heat
  • Fig. 2 - a schematic diagram
  • Fig. 4 - an isometric view with a partial cross-section of the casting mould of the system implementing the function of soaking the casting mould.
  • a ventilator 1 is mounted which is connected to a circulating air conduit: system-atmosphere, an arm of which is connected to a heat exchanger 2 and constitutes an air outlet into the atmosphere.
  • a second arm of the air conduit: system - atmosphere is connected through the heat exchanger 2 to the conduit of hot mixture: air - water vapour 16, connected with an end to an outlet of a heater 12 of the casting mould 6.
  • a mounted water pump 3 is connected to a tank 4, and via its second pipe branching, it is connected to the heat exchanger 2 which, through a peak load boiler 5, is connected to the tank 4 and is also connected to a pipe conduit of hot air 14 in which a jet pump 8 is included which is supplied with water from a water conduit 10.
  • An end of the conduit of hot air 14 is connected to a pouring tank 11 of the casting mould 6, made of moulding sand the main component of which is silica sand.
  • a pouring tank 11 of the casting mould 6 made of moulding sand the main component of which is silica sand.
  • valves 7 controlling the flow of working media filling them are included.
  • a control valve 7 is mounted, at the connection of the air conduit: system - atmosphere 17, to the ventilator 1.
  • a second control valve 7 is mounted, at the separation place of the air conduit: system - atmosphere 17.
  • a third control valve 7 is mounted on the conduit of hot air 14.
  • a fourth control valve 7 is mounted at the connection of the conduit of hot mixture: air-water vapour 15.
  • a metering valve 9 is mounted on the water conduit 10 before the jet pump 8.
  • control valves 7 and the metering valve 9 are electrically connected with a multi-strand cable to an electronic control module 13.
  • Preparation of the system for operation consists in heating the working medium, most often water, located in a peak load boiler 5 heated with gas or electric current, to a temperature of about 90°C.
  • the peak load boiler 5 is also used to heat water in the winter period during downtime of the installation, thereby protecting it from freezing.
  • hot water is pumped into the water tank 4, from where it is pumped with the pump 3 to the heat exchanger 2.
  • the ventilator 1 pumps the air form the atmosphere to a second circuit of the heat exchanger 2, from where the already heated air is pumped through a flexible conduit of hot air to the pouring tank 11 of the casting mould 6.
  • the hot air is pumped further and is distributed by channels inside the casting mould 6, thereby heating and drying it, whereupon the already cooled air escapes through heads and outlet openings 19 of the mould 6 into the atmosphere.
  • control valve 7 on the conduit 14 is closed and is demounted and, through the pouring tank 11, the mould 6 is poured with molten metal, whereupon the process of cooling and solidifying of the casting, associated with release of significant amounts of heat, is initiated and takes place.
  • the soaking system is switched to the mode of heat recovery with cooling of the casting. This is achieved by means of a set of control valves 7 which, after resetting, direct cold air from the atmosphere, pumped by the ventilator 1, through the conduit 15, in which the jet pump 8 is mounted.
  • water mist is introduced through the jet pump 8 to the air flowing through the conduit 15, thereby forming a mixture: air - water mist.
  • An end of the conduit 15 is connected to an inlet of the heater 12, through which a cold mixture: air - water mist is pumped to the interior of the coil 12.
  • the water contained in the mixture in contact with the hot coil 12 turns into water vapour with a temperature reaching up to 300°C.
  • the mixture air-water vapour, heated in the coil 12, is pumped to a flexible conduit of hot mixture 16, connected to the outlet of the coil 12, and is delivered to the heat exchanger 2, where it gives off the heat and, when cooled, is expelled through the air conduit 17 to the atmosphere.
  • the heat is absorbed by water circulating therein and is collected in the tank of working medium 4.
  • the water circulates in the exchanger system 2 in a closed circuit forced by the pump 3.
  • the system After reaching the maximum temperature of the water located in the tank 4, the system is switched off, and the supply conduit 15 and the exhaust conduit 16 are disengaged from the mould.
  • the process of heating the mould 6 and recovering the heat is checked and controlled by the electronic control system 13 to which measurement data are delivered from sensors, in particular of temperature and pressure, (not shown in the drawings) and position of the control valves 7 and the metering valve 9, and based on the said data, the control system 13 manages the entire process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mold Materials And Core Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP15460117.3A 2015-10-29 2015-12-16 System zur rückgewinnung von wärme aus erstarrenden grossen metallgussstücken und zur verwendung davon zum beheizen von giessformen Active EP3162464B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL414613A PL228708B1 (pl) 2015-10-29 2015-10-29 Układ odzysku ciepła z krzepnących metalowych odlewów wielkogabarytowych i wykorzystania go do nagrzewania form odlewniczych

Publications (2)

Publication Number Publication Date
EP3162464A1 true EP3162464A1 (de) 2017-05-03
EP3162464B1 EP3162464B1 (de) 2018-04-04

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EP15460117.3A Active EP3162464B1 (de) 2015-10-29 2015-12-16 System zur rückgewinnung von wärme aus erstarrenden grossen metallgussstücken und zur verwendung davon zum beheizen von giessformen

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EP (1) EP3162464B1 (de)
PL (1) PL228708B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108856683A (zh) * 2018-07-18 2018-11-23 王同浩 一种铝合金清洁生产用水冷设备
CN111922327B (zh) * 2020-09-24 2022-07-05 河北煜剑节能技术有限公司 一种高效包盖及烤包器

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL177383B1 (pl) 1995-02-14 1999-11-30 Osobka Slawomir Układ do odzysku ciepła od obiegu chłodniczego
KR20030049961A (ko) 2001-12-17 2003-06-25 주식회사 포스코 폐열 회수용 레이들의 보온 커버
JP2008224163A (ja) * 2007-03-14 2008-09-25 Matsushita Electric Ind Co Ltd 精密空気温度制御装置
DE102009051134A1 (de) * 2009-10-28 2011-05-05 Siemens Aktiengesellschaft Wärmerückgewinnung und Vergleichmäßigung der Wärmeabfuhr mit Hilfe von Thermosyphons oder Heat-Pipes in den Wänden einer Kokille einer Stranggussanlage
CN201988714U (zh) 2011-04-19 2011-09-28 唐山元力科技有限公司 高效余热回收式钢包烘烤装置
DE102011013670A1 (de) * 2010-04-28 2011-11-03 Robert Bosch Gmbh Verwendung eines Sorptionsmittels für Wasserdampf in einer Gießerei
WO2012069998A1 (en) * 2010-11-24 2012-05-31 Industrial Frigo S.R.L. Integrated pre-heating and cooling system for dies
CN202639324U (zh) 2012-06-30 2013-01-02 运城市关铝设备材料有限公司 有效回收利用铸造浇铸件开箱热能的专用设备
DE102012210182A1 (de) * 2012-06-18 2013-12-19 Siemens Aktiengesellschaft Verfahren zur Wärmerückgewinnung in einer Metallverarbeitungsanlage, sowie Metallverarbeitungsanlage
WO2014105720A1 (en) 2012-12-24 2014-07-03 Abengoa Solar, Inc. Apparatus, methods, and systems for recovering heat from a metal casting process
CN203817349U (zh) 2014-05-07 2014-09-10 沈阳工业大学 铸件热回收温控冷铁

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL177383B1 (pl) 1995-02-14 1999-11-30 Osobka Slawomir Układ do odzysku ciepła od obiegu chłodniczego
KR20030049961A (ko) 2001-12-17 2003-06-25 주식회사 포스코 폐열 회수용 레이들의 보온 커버
JP2008224163A (ja) * 2007-03-14 2008-09-25 Matsushita Electric Ind Co Ltd 精密空気温度制御装置
DE102009051134A1 (de) * 2009-10-28 2011-05-05 Siemens Aktiengesellschaft Wärmerückgewinnung und Vergleichmäßigung der Wärmeabfuhr mit Hilfe von Thermosyphons oder Heat-Pipes in den Wänden einer Kokille einer Stranggussanlage
DE102011013670A1 (de) * 2010-04-28 2011-11-03 Robert Bosch Gmbh Verwendung eines Sorptionsmittels für Wasserdampf in einer Gießerei
WO2012069998A1 (en) * 2010-11-24 2012-05-31 Industrial Frigo S.R.L. Integrated pre-heating and cooling system for dies
CN201988714U (zh) 2011-04-19 2011-09-28 唐山元力科技有限公司 高效余热回收式钢包烘烤装置
DE102012210182A1 (de) * 2012-06-18 2013-12-19 Siemens Aktiengesellschaft Verfahren zur Wärmerückgewinnung in einer Metallverarbeitungsanlage, sowie Metallverarbeitungsanlage
CN202639324U (zh) 2012-06-30 2013-01-02 运城市关铝设备材料有限公司 有效回收利用铸造浇铸件开箱热能的专用设备
WO2014105720A1 (en) 2012-12-24 2014-07-03 Abengoa Solar, Inc. Apparatus, methods, and systems for recovering heat from a metal casting process
CN203817349U (zh) 2014-05-07 2014-09-10 沈阳工业大学 铸件热回收温控冷铁

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VILLAR ARTURO ET AL: "Waste heat recovery technology in continuous casting process", CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY, SPRINGER BERLIN HEIDELBERG, BERLIN/HEIDELBERG, vol. 17, no. 2, 20 June 2014 (2014-06-20), pages 555 - 562, XP035451099, ISSN: 1618-954X, [retrieved on 20140620], DOI: 10.1007/S10098-014-0801-0 *

Also Published As

Publication number Publication date
EP3162464B1 (de) 2018-04-04
PL414613A1 (pl) 2017-05-08
PL228708B1 (pl) 2018-04-30

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