DE3007909C2 - Waste heat boiler - Google Patents
Waste heat boilerInfo
- Publication number
- DE3007909C2 DE3007909C2 DE3007909A DE3007909A DE3007909C2 DE 3007909 C2 DE3007909 C2 DE 3007909C2 DE 3007909 A DE3007909 A DE 3007909A DE 3007909 A DE3007909 A DE 3007909A DE 3007909 C2 DE3007909 C2 DE 3007909C2
- Authority
- DE
- Germany
- Prior art keywords
- waste heat
- heat boiler
- circulation pumps
- pumps
- further pump
- 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.)
- Expired
Links
- 239000002918 waste heat Substances 0.000 title claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/183—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines in combination with metallurgical converter installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
Die Erfindung betrifft einen Abhitzekessel für eine diskontinuierlich beheizte Anlage, bei dem die Heizflächen in einem durch Umwälzpumpen aufrecht erhaltenen Zwangslauf durchströmt sind.The invention relates to a waste heat boiler for a discontinuously heated plant, in which the heating surfaces are flowed through in a forced flow maintained by circulation pumps.
Derartige diskontinuierlich beheizte Anlagen sind z. B. Konverter zur Herstellung von Stahl nach dem Sauerstoffaufblasverfahren. Während der Betriebspausen der Konverter, in denen kein Stahl erzeugt wird, soll der Abhitzekessel in Bereitschaft gehalten werden und durchströmt sein. Auf diese Weise wird der Abhitzekessel warm gehalten, so daß Wärmespannungen infolge plötzlicher Temperaturänderungen bei einem erneuten Inbetriebsetzen vermieden werden.Such discontinuously heated systems are, for example, converters for producing steel using the oxygen-blasting process. During the converter's downtimes, in which no steel is produced, the waste heat boiler should be kept on standby and flowing. In this way, the waste heat boiler is kept warm so that thermal stresses due to sudden temperature changes are avoided when it is restarted.
Der Erfindung liegt die Aufgabe zugrunde, einen Abhitzekessel der eingangs genannten Art derart weiter zu entwickeln, daß auch während der Betriebspause der Anlage ein Durchlauf durch die Heizflächen bei gleichzeitig verminderter Antriebsleistung aufrechterhalten wird.The invention is based on the object of further developing a waste heat boiler of the type mentioned at the beginning in such a way that even during the operational break of the plant, a flow through the heating surfaces is maintained with a simultaneous reduction in drive power.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß parallel zu den Umwälzpumpen eine weitere Pumpe geschaltet ist, die auf eine geringere Durchsatzmenge als die Umwälzpumpen ausgelegt ist und daß die Pumpen in der Weise miteinander gekoppelt sind, daß die weitere Pumpe während der Betriebspausen der Anlage allein eingeschaltet ist.This object is achieved according to the invention in that a further pump is connected in parallel to the circulation pumps, which is designed for a lower throughput than the circulation pumps and in that the pumps are coupled to one another in such a way that the further pump is switched on alone during the operating breaks of the system.
Nach der Erfindung wird mit Hilfe einer verhältnismäßig leistungsschwachen Pumpe ein verminderter Durchlauf aufrechterhalten. Die Energieaufnahme dieser Pumpe ist wesentlich geringer als die der Hauptpumpen. Es hat sich gezeigt, daß ein solcher Umlauf ausreicht, um den Abhitzekessel in Bereitschaft zu halten, so daß der erfindungsgemäße Abhitzekessel wesentlich günstiger betrieben werden kann, als ein bekannter Abhitzekessel, bei dem der Durchlauf mit Hilfe der Hauptpumpen aufrechterhalten werden müßte.According to the invention, a reduced flow is maintained with the help of a relatively low-power pump. The energy consumption of this pump is significantly lower than that of the main pumps. It has been shown that such a circulation is sufficient to keep the waste heat boiler in standby, so that the waste heat boiler according to the invention can be operated much more cheaply than a known waste heat boiler in which the flow would have to be maintained with the help of the main pumps.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Die Zeichnung stellt die Schaltung eines Abhitzekessels dar.An embodiment of the invention is shown in the drawing and is described in more detail below. The drawing shows the circuit of a waste heat boiler.
Der hinter einem Stahlwerkskonverter angeordnete Abhitzekessel dient zur Abkühlung des aus dem Konverter austretenden heißen Abgases. Der Abhitzekessel besteht aus zwei Gaszügen, die hintereinander während der Blasperiode von dem Abgas durchströmt werden.The waste heat boiler located behind a steelworks converter serves to cool the hot exhaust gases leaving the converter. The waste heat boiler consists of two gas flues through which the exhaust gases flow one after the other during the blowing period.
Die Wände eines jeden Gaszuges sind als Heizflächen 1 und 2 ausgebildet, die jeweils parallel von Speisewasser durchströmt sind. Das in den Heizflächen 2 und 1 entstehende Wasser-Dampf-Gemisch wird über Leitungen einer Kesseltrommel 3 zugeführt. Der Dampf gelangt aus dem Dampfraum der Kesseltrommel 3 in einen Speicher oder direkt zu einem Verbraucher. Das Wasser wird aus dem Wasserraum der Kesseltrommel 3 entnommen und mit Hilfe von mehreren Umwälzpumpen 4 und 5 im Zwangslauf den Heizflächen 1 und 2 wieder zugeführt. Frisches Speisewasser wird über eine Kesselspeisepumpe 6 in den Wasserraum der Kesseltrommel 3 eingespeist.The walls of each gas flue are designed as heating surfaces 1 and 2 , through which feed water flows in parallel. The water-steam mixture created in the heating surfaces 2 and 1 is fed to a boiler drum 3 via pipes. The steam passes from the steam chamber of the boiler drum 3 into a storage tank or directly to a consumer. The water is taken from the water chamber of the boiler drum 3 and fed back to the heating surfaces 1 and 2 in forced operation with the help of several circulation pumps 4 and 5. Fresh feed water is fed into the water chamber of the boiler drum 3 via a boiler feed pump 6 .
Im dargestellten Fall sind für die Heizflächen 1 des ersten Gaszuges drei Umwälzpumpen 4 vorgesehen, von denen jeweils zwei in Betrieb sind, während die dritte in Reserve gehalten ist. Für die Heizflächen 2 des zweiten Gaszuges sind zwei Umwälzpumpen 4 eingesetzt.In the case shown, three circulation pumps 4 are provided for the heating surfaces 1 of the first gas flue, two of which are in operation at a time, while the third is kept in reserve. Two circulation pumps 4 are used for the heating surfaces 2 of the second gas flue.
Parallel zu den Umwälzpumpen 4 und 5 ist eine weitere Pumpe 7 geschaltet. Die Förderleitung 8 dieser weiteren Pumpe 7 mündet in eine Verbindungsleitung 9 ein. Diese mit Absperrventilen versehene Verbindungsleitung 9 verbindet die durch die Heizflächen 1 und 2 geführten Kreisläufe.A further pump 7 is connected in parallel to the circulation pumps 4 and 5. The delivery line 8 of this further pump 7 flows into a connecting line 9. This connecting line 9 , which is provided with shut-off valves, connects the circuits leading through the heating surfaces 1 and 2 .
In den Betriebspausen des Konverters, in denen kein Stahl erzeugt wird und somit auch kein heißes Abgas durch den Abhitzekessel strömt, sind alle Umwälzpumpen 4 und 5 abgeschaltet. Ein Zwangslauf wird während dieser Zeit bei einer verringerten Durchsatzmenge mit Hilfe der weiteren Pumpe 7 aufrechterhalten. Auf diese verminderte Durchsatzmenge ist die weitere Pumpe 7 ausgelegt. Die Stromaufnahme dieser weiteren Pumpe 7 ist dementsprechend auch wesentlich niedriger als die der Umwälzpumpen 4 oder 5.During the converter's downtimes, when no steel is produced and therefore no hot exhaust gas flows through the waste heat boiler, all circulation pumps 4 and 5 are switched off. During this time, forced operation is maintained at a reduced throughput with the help of the additional pump 7. The additional pump 7 is designed for this reduced throughput. The power consumption of this additional pump 7 is accordingly also significantly lower than that of the circulation pumps 4 or 5 .
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3007909A DE3007909C2 (en) | 1980-03-01 | 1980-03-01 | Waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3007909A DE3007909C2 (en) | 1980-03-01 | 1980-03-01 | Waste heat boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3007909A1 DE3007909A1 (en) | 1981-09-24 |
| DE3007909C2 true DE3007909C2 (en) | 1987-02-05 |
Family
ID=6096010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE3007909A Expired DE3007909C2 (en) | 1980-03-01 | 1980-03-01 | Waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3007909C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0460252A1 (en) * | 1990-06-05 | 1991-12-11 | Siemens Aktiengesellschaft | Steam generator and heat removal process for a steam generator |
| DE102018004987B4 (en) * | 2018-06-20 | 2022-08-25 | Singulus Technologies Ag | Method and device for providing steam |
-
1980
- 1980-03-01 DE DE3007909A patent/DE3007909C2/en not_active Expired
Non-Patent Citations (1)
| Title |
|---|
| NICHTS-ERMITTELT |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3007909A1 (en) | 1981-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8120 | Willingness to grant licences paragraph 23 | ||
| D2 | Grant after examination | ||
| 8363 | Opposition against the patent | ||
| 8365 | Fully valid after opposition proceedings | ||
| 8339 | Ceased/non-payment of the annual fee |