Drainage system of feed pump turbine arranged at low position

Abstract

The invention discloses a drainage system of a feed pump turbine arranged at low position, comprising a steam feed pump group (4) and a feed pump turbine drainage tank (8) positioned below the steam feed pump group (4); an ejector (10) is connected at the bottom of the feed pump turbine drainage tank (8) through a drainage pipe (7); the ejector (10) is connected to a condenser (6) through the drainage pipe (7); a steam balance pipe (9) is arranged above the feed pump turbine drainage tank (8); the steam balance pipe (9) is communicated with the steam side of the condenser (6); one end of the ejector (10) which is not connected with the condenser (6) is connected with a pneumatic adjusting valve (11) through the drainage pipe (7); and the inner wall of the feed pump turbine drainage tank (8) is provided with a water level height sensor which is electrically connected with the pneumatic adjusting valve (11). The steam feed pump group has lower elevation, convenient installation and easycontrol.

Description

Technical field [0001] The invention relates to the improvement of the drainage system of the feedwater pump steam turbine. Background technique [0002] For the drainage system of the feedwater pump steam turbine used in the power plant, the conventional design of the steam-driven feedwater pump unit adopts a high-level arrangement, such as figure 1 Shown: The steam-driven feedwater pump set 4 includes the front pump 3, the feedwater pump 2 and the feedwater pump steam turbine 1, which are connected in sequence. The steam-driven feedwater pump set 4 is about 15 meters above the ground, and is connected to the condenser through the drain pipe 7 In the expansion vessel 5 before 6, the expansion vessel 5 is about 0.3 meters above the ground. In the drainage pipe with a relatively high drop, water can flow to the condenser 6 through self-flow. Its main disadvantages are: it can only rely on the height difference to drain, and it is impossible to control the drain. The position of th...

AI Technical Summary

Problems solved by technology

Its main disadvantages are that it can only rely on the height drop to drain water, and cannot control the water drain. The position of the steam-driven feed water pump unit 4 is too high, which increases the difficulty and cost of installation, and at the same time cannot meet the needs of projects that cannot adopt conventional system settings due to unit transformation. Require

Images