摘要:
A control device (100) comprises: a reception unit (101) which receives a load schedule (LS) indicating a future load of a combined cycle plant; a steam temperature control unit (103) which controls the temperature of steam that flows into a steam turbine (30); and a fuel control unit (104) which controls a flow rate of fuel supplied to a gas turbine 10. The steam temperature control unit (103) outputs a command to a steam temperature adjusting device (26, 28) prior to a load decrease time at which the load is to be reduced according to the load schedule (LS), the command indicating a manipulated variable which causes the steam temperature to decrease.
摘要:
The present invention concerns an energy conversion method and system based on a Clausius-Rankine cycle and in particular on an organic Rankine cycle. The method comprises steps of providing a processing medium (2) carrying heat and/or under high pressure and temperature with increased energy content, expanding the processing medium (2) in order to generate and extract work, thereby transferring - at least in part - the processing medium (2) into a vapor state and in particular into a superheated vapor state, condensing - at least in part - the expanded processing medium (2) in said vapor state, thereby cooling and transferring the processing medium (2) into a fluid state, wherein after expanding and before and/or during condensing processing medium (2) in a non-vapor state and/or in a cooled state is continuously introduced into the expanded processing medium (2) in said vapor state to be condensed, thereby desuperheating the expanded processing medium (2) in said vapor state.
摘要:
The invention relates to a steam-temperature control device (1) for a gas- and steam turbine plant, comprising a feed water line (2), a feed-water control valve (3) located in the feed water line (2) and a water injection line (5) which branches off from the feed water line (2) upstream of the feed-water control valve (3) in the flow direction of said water and which opens into an injection cooler (4). Said steam-temperature control device is characterised in that a pre-heating device (6) for the injection water is connected in the water injection line (5). The invention further relates to a method for controlling the steam temperature in a gas- and steam turbine plant.
摘要:
The invention relates to a line (1) for a steam power plant comprising an inner pipe (2) and an outer pipe (3), wherein a flow medium present between the inner pipe (2) and the outer pipe (3) as a result of a leakage in the inner pipe (2) can be exhausted and detected by means of an exhaust device (7).
摘要:
A method and system of generating high pressure steam from a low pressure low energy steam is described and comprises providing a low pressure steam source; dividing the source into at least two streams. A first stream driving a turbine/expander coupled to a steam compressor of a steam generator. The steam compressor is fed by the second stream of the low pressure steam source, and the mass flow rate of the first stream is sufficient to raise the pressure of the second stream to a desired pressure. At steady state operating conditions the first and the second stream respectively acts as the driving force for the steam compressor and the inlet feed to the steam compressor generating the high pressure steam. In another embodiment the steam driven generator comprises a thermocompressor and may include an organic thermal fluid Rankine cycle.
摘要:
The object of the invention is to ensure a fast, economical and reliable power regulation of a steam generating power plant (1) having a turbo set that comprises a steam turbine (2) and a generator (6) and during the operation of which water (W) is injected into or upstream of an overheater heating surface. According to the disclosed fast power regulating process of the steam generating power plant (1), the injection rate of water (W) is increased to adjust an additional generator output. In a steam generating power plant (1) which is particularly suitable for carrying out the process, an overheater heating surface of a steam generator (28) is provided with a water injector (70, 71) connected to a regulating component (82) for regulating the injection rate of water (W) into the overheater heating surface. The regulating component (82) supplies a regulating signal to the water injector (70, 72) depending on the required additional generator output.
摘要:
Ein Dampfumformverfahren, bei dem Frischdampf eines durch Temperatur T FD und Druck p FD gegebenen thermodynamischen Zustand 1 in Abdampf eines durch Temperatur T AD und Druck p AD gegebenen thermodynamischen Zustand 2 mittels eines Dampfumformventil mit Kühlwassereinspritzung überführt wird, dessen Frischdampfdurchlaß (Massenstrom ṁ FD ) und dessen Kühlwasserdurchsatz (Massenstrom ṁ KW ) mit dem einstellbaren Hub eines Ventilkörpers im Dampfumform- bzw. im Kühlwasserventil veränderbar sind, wobei das Dampfumformventil mit mindestens einem Regler zusammenwirkt, der zumindest eine von Temperatur und/oder Druck des Abdampfes (T AD ; p AD ) abhängige Regelgröße erzeugt, die zumindest auf den Kühlwasserdurchsatz über vom Regler an den Hilfsantrieb abgegebene Stellgröße einwirkt, soll so weitergebildet werden, daß ein sicherer Betrieb derartiger Ventile erreicht wird, wobei insbesondere auch eine Anpassung des Reglerverhaltens an fertigungs- bzw. verschleißbedingte Abweichungen des Ventils von seiner idealen Kennlinie möglich sein soll. Dazu wird der Hub des Ventilkörpers des Dampfumformventils abgenommen, sein Wert dem Rechner zugeführt, der daraus den das Dampfumformventil durchsetzenden Frischdampf-Massenstrom ṁ FD und den dazu gehörenden Wärmestrom berechnet, ebenso der Hub des Ventilkörpers des Kühlwasserventils, aus dem dieser den das Kühlwasserventil durchsetzenden Kühlwasser-Massenstrom ṁ KW berechnet und weiter aus den Massenströmen von Frischdampf und Kühlwasser unter Berücksichtigung der Wärmebilanz die zu erwartenden Werte für Temperatur T' AD und Druck p' AD , die dieser dann mit den den Meßwerten T AD und p AD vergelicht und daraus in an sich bekannter Weise die Stellgrößen für die Regelung der Kühlwassereinspritzung ableitet.
摘要:
In a system for increasing the main stream temperature in a boiler/turbine installation to the maximum level consistent with safe operation of the installation, the difference between a signal representative of the main steam temperature and a system parameter is determined (68) and used (70) as an index to adjust the main steam temperature set point upward or downward. The system parameter selected for comparison with the signal representative of the main steam temperature may be the allowable variance between the main steam temperature and the main steam temperature set point or may be a "safety margin" temperature selected so as to be below the maximum allowable temperature for the installation.
摘要:
A combustion method for controlling and monitoring exhaust gas emissions in boilers is provided. The combustion method comprises the following steps: providing a liquid fuel in a boiler, burning the liquid fuel under atmospheric pressure; measuring a first combustion temperature in the boiler, and monitoring an initial concentration of a first exhaust gas in the boiler; adding a combustion improver to the boiler in batches and monitoring an emission concentration of the first exhaust gas in the boiler, and the emission concentration is less than the initial concentration; and repeating the above steps, and monitoring the boiler until a second combustion gas is generated, stop adding the combustion improver, and measuring the temperature in the boiler as a second combustion temperature, and reducing the amount of the combustion improver to avoid the generation of the second exhaust gas.