Regulation of medium-pressure steam temperature

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When the speed of the 130-J (syngas compressor) increases or decreases, it is necessary to adjust the pressure in the steam network through the high-pressure steam pressure relief valve. Since there is a certain temperature difference between the temperature of the high-pressure steam and that of the medium-pressure steam supplied from outside, it is essential to promptly adjust the TCV-150 (medium-pressure steam network temperature control valve) in order to regulate the temperature of the medium-pressure steam and ensure that the network does not contain water and that the temperature does not exceed safe levels. 1. When the speed of 130-J (the syngas compressor) increases, opening SIC-301 (the speed control valve for the syngas compressor) results in an increased intake volume for 103-J (the syngas compressor), which in turn leads to more medium-pressure steam being produced. This causes the pressure in the medium-pressure pipeline network to rise, necessitating the closing of PCV-13 (the pressure reduction valve that converts high-pressure steam into medium-pressure steam). At this point, there is a large amount of medium-pressure steam available, and the temperature of the medium-pressure pipeline network drops significantly; therefore, it is necessary to promptly close TCV-150 (the temperature control valve for the medium-pressure steam pipeline network). Under normal circumstances, when PCV-13 is fully closed, TCV-150 is also fully closed. However, due to potential leaks within TCV-150, it is necessary to close the valve located before TCV-150 as well in order to maintain a proper temperature of the medium-pressure steam. 2. When 130-J slows down its rotation speed, it is necessary to reduce the setting of SIC-301 (the speed control valve for the syngas compressor); as a result, the air intake volume of 103-J (the syngas compressor) decreases. This leads to a pressure drop in the medium-pressure steam network, while the pressure in the high-pressure steam network rises. It is therefore necessary to promptly increase the opening degree of PCV-13 (the pressure reduction valve that transfers high-pressure steam to medium-pressure steam), thereby increasing the amount of steam that is reduced in pressure. At the same time, it is appropriate to coordinate with external suppliers regarding the amount of medium-pressure steam to be supplied externally. At this time, due to the large amount of pressure reduction by the pressure relief valve, the temperature of the medium-pressure steam tends to be high and rises rapidly; it is necessary to promptly inform the site to open the upstream valve of TCV-150 (the temperature control valve for the medium-pressure steam pipeline), so that the control room can adjust the pressure in that pipeline. This post was last edited by snowdfr on 2009-3-2 14:16]