Steam system comprises low pressure degasser for degassing feed water, low pressure steam rail, whose operating pressure is at second pressure level, and high pressure steam rail, whose operating pressure is at third pressure level

摘要

Steam system comprises: a low pressure degasser (16) for degassing a feed water, where the operating pressure of the low pressure degasser is at a first pressure level above atmospheric pressure; a low pressure steam rail (22), whose operating pressure is at a second pressure level, where second pressure level is above first pressure level; and a high pressure steam rail (38), whose operating pressure is at a third pressure level, where third pressure level is above second pressure level. At least one steam turbine (40) is provided between high pressure steam rail and low pressure degasser. Steam system comprises: a low pressure degasser (16) for degassing a feed water, where the operating pressure of the low pressure degasser is at a first pressure level above atmospheric pressure; a low pressure steam rail (22), whose operating pressure is at a second pressure level, where the second pressure level is above the first pressure level; and a high pressure steam rail (38), whose operating pressure is at a third pressure level, where the third pressure level is above the second pressure level. At least one steam turbine (40) is provided between the high pressure steam rail and the low pressure degasser, which relaxes the steam from the high pressure steam rail by the third pressure level to the first pressure level. An independent claim is also included for a plant for producing olefins using the steam system.