SU397668A1 - METHOD OF REGULATING TURBO COMPRESSOR - Google Patents

Description

one

The invention relates to a power system and can be used to create installations using high sulfur ash fuel.

Methods are known for controlling turbo-compressor units by varying the temperature of the gas in front of the turbine. However, with this control, the air flow and turbosity of the turbine are interconnected and are determined by the characteristics of the turbines.

The proposed method differs from the known ones in that the gas flow rate is controlled by throttling in front of the turbine, and the power of the turbine is controlled by changing the air supply to the combustion chamber.

The degree of throttling is varied by the gas pressure downstream of the turbine, and the air supply to the combustion chamber is varied by the difference between the actual and predetermined revolutions of the turbocharger.

In order to ensure a compressor free operation in a wide load range, the turbocharger speed is controlled depending on the gas pressure behind the turbine.

Such a method., Loc. 3 (it will be possible to change the gas flow rate and the power of the turbine independently of one another.

The drawing shows a diagram illustrating the proposed method.

Air compressed by a compressor. The air and all the fuel oil consumed by the steam power unit enters the reactor 2. There the fuel oil undergoes incomplete combustion at a constant excess of air and a temperature of about 1300 ° C. In this case, the fuel is completely converted into a combustible gas containing in the main: 1 carbon monoxide, nitrogen, hydrogen and hydrogen sulfide. The resulting gas is cooled in the gas cooler 3, cleaned of ash and sulfur compounds in the gas purification system 4, expanded in the gas turbine 5, which drives the compressor 1, and enters the fuel manifold 6 of the boiler of the steam power unit.

In order to provide the consumption of gasification products specified by the consumer (boiler), it is necessary to maintain a certain pressure in the fuel collector 6 of the consumer. To do this, a throttle 7 in front of the gas turbine 5 is supplied with a regulating impulse according to this pressure value.

To maintain the programmed rotational speed (power balance) on the shaft of the turbo-compressor unit, which is set by the speed adjuster 8 according to the total impulse from the differential pressure to the throttle .7 in front of the turbine and the pressure level in the fuel collector 6, the speed regulator 9 is provided. the difference between the actual speed of the unit and the programs with the impact on the air supply valve 10 into the combustion chamber //. This leads to a change in the temperature of the gasification products before the turbine, and consequently, to a change in the power of the gas turbine. With increasing consumer load, the consumption of gasification products increases, and the pressure in the fuel collector 6 decreases. As a result, the flow area of the throttles 7 increases and the distribution code of the gasification products through the gas turbine 5 increases. At the same time, the speed adjuster 8 changes 15 program revolutions according to the corresponding pressure change in the fuel manifold 6 and the pressure differential across the throttle 7. The speed regulator 9 will affect the air supply to the combustion chamber according to the imbalance that arises between the actual and program 20 gram revolutions / / by means of an air valve 10. As a result, the temperature in front of the gas turbine, and consequently, the power of the latter, is increased, the compressor / goes into a new operating point according to the characteristic, increasing In this case, the compressed air supply to the reactor 2. Thus, the installation switches to the new operating mode. 5 30 Subject of the invention 1. A method of controlling a turbo-compressor unit for gasifying a fuel equipped with a compressor, a combustion chamber and a turbine by changing the temperature of the gas in front of the turbine, characterized in that, in order to ensure an independent change in the gas flow and the power of the turbine a turbine, and the turbine power is a change in the air supply to the combustion chamber, 2. The method according to claim 1, characterized in that the degree of throttling is varied by the pressure of the gas behind the turbine, and the supply ozduha in the combustion chamber - the difference between the actual and nominal revolutions of the turbocharger. 3. Method according to pi. 1, 2, characterized in that, in order to ensure a free operation of the compressor in a wide range of loads, the speed of the turbocharger is controlled depending on the gas pressure behind the turbine. 4. The method according to paragraphs. 1, 2, characterized in that, in order to use the accumulating capacity of the container between the compressor and the turbine, the speed of the turbocharger is changed depending on the pressure differential across the throttle in front of the turbine.