Method for starting a continuous steam generator
AssigneeSiemens Aktiengesellschaft
InventorsRudolf Kral, Frank Thomas
Life of this patent
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Abstract
A method for starting a continuous steam generator is provided. The steam generator includes a combustion chamber provided with a plurality of burners, a water-steam separation device that is mounted downstream of evaporator tubes of the water-steam separation device on a flow-medium side. The amount of water flowing into the water-steam separation device during a starting process is kept to a minimum. The firing power of at least one of the burners is adjusted in accordance with a filling level characteristic value of the water-steam separation device.
Claims15
A method of starting a continuous steam generator, comprising:
- providing a combustion chamber comprising a plurality of burners, a water-steam separation device being arranged downstream of a plurality of evaporator tubes of the combustion chamber on a flow medium side, and a plurality of superheater tubes arranged downstream of both the plurality of evaporator tubes and the water-steam separation device;
- measuring by a sensor a value of a fill level of water-steam separation device;
- adjusting a firing power of at least one of the burners by a control unit as a function of a value of the fill level of water for the water-steam separation device to minimize the water quantity flowing into the water-steam separation device during a starting process,
- wherein the firing power is adjusted as a function of a change in speed of the value of the fill level such that the firing power is adjusted when the value of the fill level is increasing, and
- wherein the water is a result of water discharge due to incipient evaporation.
A continuous steam generator, comprising:
- a combustion chamber with a plurality of burners and evaporator tubes;
- a water-steam separation device being arranged downstream of the evaporator tubes on a flow medium side and upstream of a plurality of superheater tubes;
- a sensor for measuring a value of a fill level of the water-steam separation device wherein water in the water-steam separation device is a result of water discharge due to incipient evaporation;
- and
- a control unit for adjusting a firing power,
- wherein the control unit is connected on a data input side to the sensor for measuring a value of the fill level of the water-steam separation device wherein the control unit adjusts the firing power as a function of the value to minimize the water quantity flowing into the water-steam separation device during a starting process wherein the water quantity provides sufficient cooling of the evaporator tubes, and
- wherein the control unit adjusts the firing power as a function of a change in speed of a value of the fill level such that the firing power is adjusted when the value of the fill level is increasing.
Dependencies are inferred from the claim text.