WO2008064790A1 - Verfahren und anlage zum herstellen von wasserglas mit wärmerückgewinnung - Google Patents
Verfahren und anlage zum herstellen von wasserglas mit wärmerückgewinnung Download PDFInfo
- Publication number
- WO2008064790A1 WO2008064790A1 PCT/EP2007/009964 EP2007009964W WO2008064790A1 WO 2008064790 A1 WO2008064790 A1 WO 2008064790A1 EP 2007009964 W EP2007009964 W EP 2007009964W WO 2008064790 A1 WO2008064790 A1 WO 2008064790A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- heat exchanger
- glass
- furnace
- water
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B3/00—Charging the melting furnaces
- C03B3/02—Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
- C03B3/023—Preheating
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/32—Alkali metal silicates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Definitions
- the invention relates to a method for producing a product by melting a feed and solidifying, preferably a method for producing glasses, in particular of water glass, in an oven, preferably in a pan furnace, with heat recovery.
- Water glass is produced industrially by three processes, the classical melting process in the furnace, the melting process in the rotary kiln and the hydrothermal process.
- the soda process for the production of solid soda water glasses is a high-temperature process in which a mixture (mixture) of sand and soda at temperatures of 1300-1500 0 C in furnaces of the type Siemens Martin regenerative furnace or in the rotary kiln is alkaline digested to water glass.
- the air for combustion is fed to the regenerative chambers via fans and Um Kunststofforgane and preheated to about 1200 0 C.
- the treated mixture When produced in a rotary kiln, the treated mixture is introduced at the higher side of the furnace and transported by turning the cylindrical furnace from the cold to the hot area. This constantly creates new surfaces.
- the oven which is inclined by 3 - 7 °, is rotated very slowly around its axis by a tooth, roller or worm wheel drive. It is heated from the lower end with oil or gas. The glass melt is discharged at the lower Eride and fed to further processing.
- Solid water glass from the tub or rotary kiln is not used as a solid but almost exclusively as an aqueous solution, usually in 35% strength. concentration.
- the obtained from the melting process cooled to 300 0 C solid glass pieces are dissolved in water at temperatures between 100 0 C at atmospheric pressure and 150 0 C in the pressure vessel.
- the solution is, depending on the requirement profile, further formulated, so filtered, concentrated and optionally modified with inorganic or organic additives.
- alkali silicates are obtained bypassing the high-temperature process directly from sand and sodium hydroxide solution at about 200 0 C and high pressure of about 20 bar in an autoclave as liquid water glasses.
- potash glasses are also used to a lesser extent.
- potassium silicates are used only where sodium would interfere.
- the melting process of z As glasses and metals in industrial furnaces takes place at very high temperatures and is therefore very energy-intensive.
- the melt is discharged after the furnace outlet mostly via a so-called cooling belt, the heat. This heat removal is usually necessary for the subsequent process steps. This heat content of the melt occurs as heat loss.
- the free heat of the melt heats the space at the cooling belt.
- the hot ambient temperature thus hinders working in the vicinity of melting furnaces and affects the performance of the plant operator.
- the residual heat of the exhaust gas is fed to a recuperator after exiting the rotary kiln to heat the required combustion air, where the exhaust gas of about 600 0 C to 200 to 250 0 C is cooled. At the same time outside air is heated to 350 to 400 0 C and then passes to the combustion torch at the bottom of the rotary kiln.
- the invention has for its object to save energy in the process of the type mentioned at the same time, to increase the capacity of the furnace furnace to improve occupational safety and to consume less cooling water for cooling the conveyor belt for the produced molten glass.
- the water is injected during cooling against the cooling belt and evaporates there.
- This object is achieved in the method of the type mentioned in the present invention by using at least a portion of the heat emitted by the product produced, in particular during its solidification, for preheating the feed.
- the invention also relates to a corresponding system according to claims 8 and 9.
- the first heat exchanger is arranged around the continuously inclined upwardly moving cooling belt and above the cooling belt onto which the molten water glass drips or flows out of the tank furnace in order to solidify and cool there. During the return of the cooling belt obliquely down this is sprayed with water and cooled in this way.
- the also arranged obliquely and above the cooling belt hood enhances the flow of air between the hood and the cooling belt, whereby the convective portion of the heat transfer from the molten glass or the hot cooling belt to the hood, which is also the first heat exchanger is increased.
- pipes extending parallel to the cooling belt are arranged in the hood in which the heat carrier, in particular water, flows under elevated pressure. Surprisingly, the still cold water (20 - 30 0 C) is heated to at least about 140 0 C in this way.
- the heat transfer takes place here mainly by radiation.
- an additional exhaust chimney in the hood which leads vertically upwards and leads to a reinforcement of the chimney effect, so that the air velocity of about 1 m / s increases to about 2 m / s.
- a temperature increase of about 10% due to the significant improvement in heat transfer is the result.
- the first heat exchanger so the hood works in cocurrent with the also transported from the bottom up molten water glass. But a countercurrent cooling is also possible and possibly even particularly advantageous.
- the invention leads to z. B. Steam generation by the recovery of the heat capacity of the hot melt.
- the generated steam via the melt transport can z. B. be used for warming up the feed. Heating the feed can save energy.
- preheating the feed increases the capacity of the ovens, as more pro- can be made.
- the safety is increased.
- the invention is in particular to recover the amount of heat to be dissipated, which currently occurs as heat loss, over the cooling belt by a newly installed heat exchanger and lead back into the process for further use. With this amount of heat z. B. superheated or saturated steam can be generated.
- All or most of the generated heat from the heat exchanger can be sold or otherwise used.
- a portion of the steam generated in the first heat exchanger may, for. B. another suitable heat exchanger to preheat the feed. This saves energy and increases the capacity of the furnace.
- the vapor stream leaving the second heat exchanger as condensate can be used for another process. Accordingly, if the condensate from the second heat exchanger is used directly for another process, the required energy consumption can be reduced.
- FIG. 1 shows a schematic representation of the production of water glass according to the prior art
- Figure 2 is a schematic overview of the inventive method and the inventive system according to an embodiment (without a precise representation of the area around the hood 16) and
- FIG. Sand and soda are fed via a belt weigher 1 and a mixing screw 2 to a furnace 3, which is heated with an oil or gas burner 4. Alternatively, the heating can be done electrically or by a combination of the heating types mentioned.
- Fresh air is introduced via a fan 5 and a regenerative chamber 6 in the furnace 3.
- the exhaust gases 7 leave the furnace via a second regenerative chamber 8, an exhaust gas cooler 9 and an electrostatic precipitator 10.
- the molten water glass drips onto a cooling belt 11, where it solidifies and from which it is discharged as piece glass 12. As far as the piece of glass 12 is not stored and resold, it gets into the so-called solver 13. In this container, it is dissolved under supply of water and under pressure, so that finally obtained liquid glass 14.
- FIGS. 2 and 3 An example of the method according to the invention and the system according to the invention is shown in FIGS. 2 and 3.
- the melt, so the molten water glass flows from the furnace 3 on the cooling belt 11, which moves in the manner of an escalator upwards.
- On the “steps” of this "escalator” is the molten water glass 15 arrived at the top of the stairs, the solidified water glass is dropped from the stairs and collected as so-called piece glass 12.
- the "steps" are cooled by spraying with water.
- the cooling belt 11 is surrounded by a hood 16 which is open at the bottom and which is equipped on the inside with tubes 17 running parallel to the cooling belt.
- Fresh water is introduced at the lower end of these tubes via a pump 18 with overpressure (about 20 bar) and heats up in the tubes due to the high temperature of the cooling belt and the melt of about 1000 0 C in the lower Area of the cooling belt, ie at the feeding point of the molten water glass.
- the water glass and the cooling belt only have a temperature of about 300 0 C.
- the water is recycled via a condenser 19 under pressure in the circuit. By relaxing the valve 25 to 4 bar 4-bar steam is generated.
- saturated steam at 4 bar and 163 0 C At the upper end of the tubes 17 are obtained saturated steam at 4 bar and 163 0 C. A portion of the steam is discharged via line 20 as external steam for purposes other than for the production of water glass.
- the other part of the generated steam is supplied via the line 21 to a second heat exchanger 22, namely a plate heat exchanger for bulk material, which preheats the feed, namely the mixture of sand and soda to a temperature of about 125 0 C.
- the preheating of the feed allows a higher throughput in the furnace 3, in which the preheated feed is fed.
- the steam flows into a condenser 23.
- the hot condensate is introduced via a pump 24 into the dissolver 13, where it serves to save externally supplied 4 bar steam.
- the proposed concept is very suitable for. B. for the efficient use of the heat content of the melt in the production of glasses (see Fig. 2 and 3).
- the heat content of the melt can be used according to the invention to generate steam with the aid of a suitable shell-and-tube heat exchanger.
- heat exchangers all technical heat exchangers known to those skilled in the art can be used here.
- the heat transfer by technical measures such. B. attachment of a hood, blower, etc. can be improved.
- the surface properties (eg color, coating, roughness) of the pipes or of the heat exchanger the heat transfer can be increased.
- the heat exchanger consists of tube bundles with a hood (see Fig. 2 and 3), to increase the air velocity by a chimney effect.
- the greater part of the generated steam from the first heat exchanger (hood 16) can be sold or used in-house. At least a portion of the first heat exchanger (hood 16) generated steam is z. B. fed to another suitable heat exchanger to preheat the feed of sand and soda according to the invention. The mixture is heated to about 125 ° C. in the second heat exchanger.
- all common types of heat exchangers can be used.
- plate heat exchangers and especially vibrating heat exchangers are suitable for preheating solids such as e.g. As the sand used or sand and soda.
- the humidity of the feed is not relevant to the procedure under suitable operating conditions.
- the preheated feed increases the capacity of the oven and saves energy.
- the vapor stream exiting the second heat exchanger 22 as condensate can be used for another process. If the condensate from the second heat exchanger 22 is used according to the invention directly for the dissolving process, the required energy consumption can accordingly be reduced.
- the energy gained can also be used elsewhere for this or any other arbitrary process.
- the cooling of the cooling belt 11 is carried out according to the invention mainly on the first heat exchanger 16.
- the remaining cooling is made as before with water, which is injected from below onto the top of the returning from top to bottom band.
- the unevaporated water can also be used for the solver.
- the hood 16 is structurally designed so that the pipes are easy to clean from the outside.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Glass Melting And Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002673495A CA2673495A1 (en) | 2006-11-27 | 2007-11-17 | Process and facility for producing soluble glass using heat recovery |
BRPI0719311-4A2A BRPI0719311A2 (pt) | 2006-11-27 | 2007-11-17 | Processo e instalação para a fabricação de vidro solúvel com recuperação de calor. |
EP07846653A EP2086893A1 (de) | 2006-11-27 | 2007-11-17 | Verfahren und anlage zum herstellen von wasserglas mit wärmerückgewinnung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006055786A DE102006055786B4 (de) | 2006-11-27 | 2006-11-27 | Verfahren und Anlage zum Herstellen von Wasserglas mit Wärmerückgewinnung |
DE102006055786.7 | 2006-11-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008064790A1 true WO2008064790A1 (de) | 2008-06-05 |
Family
ID=38982665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/009964 WO2008064790A1 (de) | 2006-11-27 | 2007-11-17 | Verfahren und anlage zum herstellen von wasserglas mit wärmerückgewinnung |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2086893A1 (de) |
CN (1) | CN101541692A (de) |
BR (1) | BRPI0719311A2 (de) |
CA (1) | CA2673495A1 (de) |
DE (1) | DE102006055786B4 (de) |
WO (1) | WO2008064790A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11591247B2 (en) | 2017-05-23 | 2023-02-28 | Arc France | Combined furnace |
US11807567B2 (en) | 2017-06-30 | 2023-11-07 | Arc France | Production of glass from a mixture comprising calcium oxide, and glass furnace |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102730707B (zh) * | 2011-04-02 | 2015-09-23 | 青岛东岳泡花碱有限公司 | 硅酸钠(泡花碱)生产工艺热能回收利用系统 |
DE102016205845A1 (de) | 2016-04-07 | 2017-10-12 | Tu Bergakademie Freiberg | Verfahren zur Herstellung von Glas, Steuereinrichtung, Anlage zur Herstellung von Glas |
CN108946779A (zh) * | 2018-09-30 | 2018-12-07 | 上海高桥大同净水材料有限公司 | 一种高纯聚硫氯化铝的生产方法及生产系统 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0066214A1 (de) * | 1981-05-30 | 1982-12-08 | Henkel Kommanditgesellschaft auf Aktien | Kontinuierliches Verfahren zur Reaktion von in flüssiger Phase vorliegenden Komponenten mit in körniger Form vorliegenden Komponenten |
JPS589829A (ja) * | 1981-07-07 | 1983-01-20 | Asahi Glass Co Ltd | ガラス「鎔」融炉の熱回収方法の改良 |
US4676953A (en) * | 1984-06-29 | 1987-06-30 | Henkel Kommanditgesellschaft Auf Aktien | Continous production of sodium silicate solutions |
WO1997034829A1 (en) * | 1996-03-18 | 1997-09-25 | Pq Corporation | Silicate reactor with submerged burners |
FR2816529A1 (fr) * | 2000-11-13 | 2002-05-17 | Rech S De Traitement Des Deche | Procede de traitement de residus d'incineration et installation pour la mise en oeuvre d'un tel procede |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2371213A (en) * | 1939-06-17 | 1945-03-13 | George W Batchell | Apparatus for forming batch bodies |
US3645712A (en) * | 1970-05-06 | 1972-02-29 | Corning Glass Works | Radiation target structure and use to cool molten glass |
JPS54123118A (en) * | 1978-03-16 | 1979-09-25 | Nippon Sheet Glass Co Ltd | Granulation of glass raw material |
DE4141625A1 (de) * | 1991-12-17 | 1993-06-24 | Gruenzweig & Hartmann | Verfahren zum erschmelzen von silikatischen rohstoffen, insbesondere zur herstellung von mineralwolle, sowie vorrichtung zur vorwaermung des rohstoffgemenges |
AT411363B (de) * | 2002-02-21 | 2003-12-29 | Tribovent Verfahrensentwicklg | Einrichtung zum schmelzen von stäuben |
-
2006
- 2006-11-27 DE DE102006055786A patent/DE102006055786B4/de not_active Expired - Fee Related
-
2007
- 2007-11-17 BR BRPI0719311-4A2A patent/BRPI0719311A2/pt not_active Application Discontinuation
- 2007-11-17 CA CA002673495A patent/CA2673495A1/en not_active Abandoned
- 2007-11-17 WO PCT/EP2007/009964 patent/WO2008064790A1/de active Application Filing
- 2007-11-17 CN CNA2007800440762A patent/CN101541692A/zh active Pending
- 2007-11-17 EP EP07846653A patent/EP2086893A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0066214A1 (de) * | 1981-05-30 | 1982-12-08 | Henkel Kommanditgesellschaft auf Aktien | Kontinuierliches Verfahren zur Reaktion von in flüssiger Phase vorliegenden Komponenten mit in körniger Form vorliegenden Komponenten |
JPS589829A (ja) * | 1981-07-07 | 1983-01-20 | Asahi Glass Co Ltd | ガラス「鎔」融炉の熱回収方法の改良 |
US4676953A (en) * | 1984-06-29 | 1987-06-30 | Henkel Kommanditgesellschaft Auf Aktien | Continous production of sodium silicate solutions |
WO1997034829A1 (en) * | 1996-03-18 | 1997-09-25 | Pq Corporation | Silicate reactor with submerged burners |
FR2816529A1 (fr) * | 2000-11-13 | 2002-05-17 | Rech S De Traitement Des Deche | Procede de traitement de residus d'incineration et installation pour la mise en oeuvre d'un tel procede |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11591247B2 (en) | 2017-05-23 | 2023-02-28 | Arc France | Combined furnace |
US11807567B2 (en) | 2017-06-30 | 2023-11-07 | Arc France | Production of glass from a mixture comprising calcium oxide, and glass furnace |
Also Published As
Publication number | Publication date |
---|---|
CN101541692A (zh) | 2009-09-23 |
CA2673495A1 (en) | 2008-06-05 |
DE102006055786B4 (de) | 2010-03-18 |
BRPI0719311A2 (pt) | 2014-02-04 |
DE102006055786A1 (de) | 2008-06-05 |
EP2086893A1 (de) | 2009-08-12 |
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