摘要:
The invention relates to a process for the heat treatment of steel products, in particular of steel strips or sheets, in which the product is brought from a starting temperature to a target temperature in a booster zone (6, 7, 8) having at least one burner. The burner is operated with a fuel, in particular a fuel gas, and an oxygen- containing gas which contains more than 21% oxygen (oxy-fuel burner). The product is brought into direct contact with the flame generated by the burner, the air ratio lambda within the flame being set as a function of the starting temperature and/or the target temperature of the product. The burners are adjusted so that the flame surrounds the product over its entire periphery transversely to the conveying direction. Thus, the products are heated uniformly with a precisely controlled oxidation degree.
摘要:
An oxygen fuelled combustion system includes a furnace (14) having at least one burner, an oxygen supply for supplying oxygen having a predetermined purity, and a carbon based fuel supply for supplying a carbon based fuel. The oxygen and the carbon based fuel are fed into the furnace (140 in a stoichiometric proportion to one another to limit an excess of either the oxygen or the carbon based fuel to less than 5% over the stoichiometric proportion. The combustion of the carbon based fuel provides a flame temperature in excess of 4500°F. The exhaust gas stream form the furnace (14) has substantially zero nitrogen-containing combustion produced gaseous compounds from the oxidizing agent and reduced greenhouse gases. Substantially less carbon based fuel is required than conventional combustion systems without a loss of energy output.
摘要:
An ash melting furnace capable of a high-efficiency, stable operation and accommodating load variations, which is used for mixed melting for heating and melting main ash and flying ash as burned ash simultaneously, characterized in that main ash (coarse grain ash) in an upper layer and flying ash (fine grain ash) in a lower layer are supplied in layers from one end of the furnace body and heated and melted by a burner while being moved to the other end, whereby enabling the burner, when an oxygen enriched burner is used, to properly control an oxygen amount added to air (concentration change included) and, in response to a heated and melted ash condition caused by the combustion of the oxygen enriched burner, to properly control, in addition to fuel supply amount, an ash supply amount as required by a change in the oxygen enriching concentration.
摘要:
An ash melting furnace capable of a high-efficiency, stable operation and accommodating load variations, which is used for mixed melting for heating and melting main ash and flying ash as burned ash simultaneously, characterized in that main ash (coarse grain ash) in an upper layer and flying ash (fine grain ash) in a lower layer are supplied in layers from one end of the furnace body and heated and melted by a burner while being moved to the other end, whereby enabling the burner, when an oxygen enriched burner is used, to properly control an oxygen amount added to air (concentration change included) and, in response to a heated and melted ash condition caused by the combustion of the oxygen enriched burner, to properly control, in addition to fuel supply amount, an ash supply amount as required by a change in the oxygen enriching concentration.
摘要:
An arrangement for regulating the temperature in an area of a tunnel furnace for baking products transported through the furnace according to a given loading profile. The area is provided with a temperature sensor and with shut-off burners, with at least one processing unit included in a control circuit for regulating the supply of gas to and for switching at least several burners on and off, which are included in the control circuit, in response to temperature data generated by the temperature sensor. Each burner included in the control circuit is coupled to an air supply line, a pressure gauge in the air supply line and an air pressure measuring value supplied to the processing unit. Said processing unit sets the air pressure in the air supply line at given values.
摘要:
An arrangement for regulating the temperature in an area of a tunnel furnace for baking products transported through the furnace according to a given loading profile. The area is provided with a temperature sensor and with shut-off burners, with at least one processing unit included in a control circuit for regulating the supply of gas to and for switching at least several burners on and off, which are included in the control circuit, in response to temperature data generated by the temperature sensor. Each burner included in the control circuit is coupled to an air supply line, a pressure gauge in the air supply line and an air pressure measuring value supplied to the processing unit. Said processing unit sets the air pressure in the air supply line at given values.
摘要:
Bei einem Verfahren zum Betrieb einer ein Gas (8) ausblasenden Blaslanze (2), insbesondere Sauerstoffblaslanze, in einem metallurgischen Gefäß (1), wobei der vorzugsweise auswechselbare Lanzenkopf (4) der Blaslanze (2) mindestens eine Überschalldüse aufweist, soll eine Lösung geschaffen werden, die eine kontinuierliche Erfassung von beim Betrieb einer Gas ausblasenden Blaslanze, insbesondere Sauerstoffblaslanze, in einem metallurgischen Gefäß zur Verfahrenssteuerung verwendeten Betriebsparametermesssignalen ermöglicht. Dies wird dadurch erreicht, dass mittels mindestens eines im Lanzenkopf (4) im Bereich der Überschalldüse angeordneten Detektors oder Sensors (9a, 9b) während des Betriebs der Blaslanze (2), insbesondere während eines Blasprozesses, vorzugsweise Sauerstoffblasprozesses, insbesondere kontinuierlich, im Lanzenkopf (4) der Eintrittsdruck (p 0t ) und/oder die Eintrittstemperatur (T 0t ) des Gases (8) an der mindestens einen Überschalldüse und/oder die Schwingungsamplitude (A) und/oder die Schwingungsfrequenz (ω) der Blaslanze (2) und/oder der Zündzeitpunkt der Zündung beim Sauerstoffblasverfahren und/oder der Ortspunkt der Zündung beim Sauerstoffblasverfahren detektiert und/oder gemessen wird/werden und das oder die dabei erhaltene(n) Messsignal(e) während des Betriebes der Blaslanze (2) einer an den mindestens einen Detektor oder Sensor (9a, 9b) angeschlossenen Auswerte- und/oder Prozesssteuereinheit vorzugsweise online zuführt und zur Steuerung des Betriebes der Blaslanze (2) bereitgestellt wird/werden.