CN203783654U

CN203783654U - Turbine low-pressure heater drainage system

Info

Publication number: CN203783654U
Application number: CN201320729240.6U
Authority: CN
Inventors: 王辉; 谢文辉; 王同举; 苗祎磊; 刘树军; 苏伟力
Original assignee: Datang Luoyang Shouyangshan Power Generation Co Ltd
Current assignee: Datang Luoyang Shouyangshan Power Generation Co Ltd
Priority date: 2013-11-13
Filing date: 2013-11-13
Publication date: 2014-08-20
Anticipated expiration: 2023-11-13

Abstract

A turbine low-pressure heater drainage system comprises a turbine low-pressure heater system, a drainage tank, and a condenser connected with the drainage tank through a drainage pipeline. The turbine lower-pressure heater system is connected with a low-pressure heater emergency drainage pipeline, a first low-pressure heater normal drainage pipeline and a second low-pressure heater normal drainage pipeline. The first low-pressure heater normal drainage pipeline and the second low-pressure heater normal drainage pipeline are connected with the drainage tank, and the low-pressure heater emergency drainage pipeline is directly connected with the condenser. The second low-pressure heater normal drainage pipeline is provided with a first normal drainage adjusting door, and the low-pressure heater emergency drainage pipeline is provided with an emergency drainage adjusting door. Conventional drainage systems are integrated and optimized, thermal load of the condenser is lowered, the safe and economical operation requirement of a unit is met, and safe and stable operation of low-pressure heater drainage is guaranteed; a low-pressure normal drainage branch is added, drainage flow can be increased, resistance is reduced, and drainage is smooth.

Description

Steam turbine low-pressure drainage system of heater

Technical field

The utility model relates to thermal power generation unit thermodynamic system, specifically a kind of steam turbine low-pressure drainage system of heater.

Background technique

Draining system is as one of of paramount importance attached thermodynamic system in the production process of thermal power plant, and safe, reliable, the economy to unit and environmental protection operation, play a part very important.The conventional design in thermal power plant, thermodynamic system adopts unit mode processed, is provided with altogether eight sections and draws gas and supply with respectively three high-pressure heaters, an oxygen-eliminating device and four low-pressure heaters.Low pressure draining system cannot bringing normally into operation after operation for this unit, drainage pump rated lift is higher, door governing speed is adjusted in outlet and drain tank water level cannot be corresponding, after drainage pump starts, within a few minutes by hydrophobic fanning the air in drain tank, anhydrous idle running in drainage pump, forced outage, equipment is idle for a long time, and draining system cannot reach designing requirement.Through same type units is carried out to Field Research discovery, drainage pump system is in for subsequent use or idle state at a low price for most units, and economic benefit is low; Meanwhile, also there is the high problem of the sorrowful water level of the low aerating of the normal drain water piping of low pressure.

Model utility content

Technical problem to be solved in the utility model is to overcome draining system in prior art to utilize the problems such as economic benefit is low, the low aerating side of the normal drain water piping of low pressure water level height, provides a kind of steam turbine the low drainage system of heater that adds.

The utility model for addressing the above problem adopted technological scheme is: steam turbine low-pressure drainage system of heater, comprise the low adding system of steam turbine, drain tank and the coagulator being connected with drain tank by drain water piping, the low adding system of described steam turbine respectively with lowly add emergent drain pipeline, the first low normal drain water piping and second that adds lowly adds normal drain water piping and is connected, described first lowly adds normal drain water piping and lowly adds normal drain water piping and be all connected with drain tank with second, and the low emergent drain pipeline that adds is directly connected with coagulator; Described second lowly adds normal drain water piping and is provided with the first normal hydrophobic adjustment door, and the described low emergent drain pipeline that adds is provided with emergent drain and adjusts door.

Described low adding on emergent drain pipeline,, be positioned at the normal hydrophobic branch road of low pressure that is provided with a road before emergent drain adjustment door and is connected to drain tank, and the normal hydrophobic branch road of low pressure is provided with the second normal hydrophobic adjustment.

Beneficial effect: the utility model is removed the low-pressure heater and drainage pump group in conventional design, and conventional draining system is integrated and optimized, reduce coagulator heat load, the needs of unit safety economical operation are met, obtain good economic benefit, ensured the safe and stable operation of low plus hydrophobic; Meet usage requirement for better meeting, install the normal hydrophobic branch road of Liao Yi road low pressure additional, can increase hydrophobic flow, reduce resistance, make hydrophobic unobstructed.

Brief description of the drawings

Fig. 1 is the structural drawing of the utility model draining system.

Reference character: 1, the low adding system of steam turbine, 2, the low emergent drain pipeline that adds, 3, first lowly adds normal drain water piping, 4, second lowly adds normal drain water piping, and 5, the first normal hydrophobic adjustment door, 6, emergent drain adjusts door, 7, coagulator, 8, drain tank, 9, the normal hydrophobic branch road of low pressure, 10, the second normal hydrophobic adjustment door.

Embodiment

As shown in Figure 1, steam turbine low-pressure drainage system of heater, comprise the low adding system 1 of steam turbine, drain tank 8 and the coagulator 7 being connected with drain tank 8 by drain water piping, the low adding system 1 of described steam turbine respectively with lowly add emergent drain pipeline 2, the first low normal drain water piping 3 and second that adds lowly adds normal drain water piping 4 and is connected, described first lowly adds normal drain water piping 3 and lowly adds normal drain water piping 4 and be all connected with drain tank 8 with second, and the low emergent drain pipeline 2 that adds is directly connected with coagulator 7; Described second lowly adds normal drain water piping 4 and is provided with the first normal hydrophobic adjustment door 5, and the described low emergent drain pipeline 2 that adds is provided with emergent drain and adjusts door 6.

Above-mentioned low adding on emergent drain pipeline 2,, be positioned at the normal hydrophobic branch road 9 of low pressure that is provided with a road before emergent drain adjustment door 6 and is connected to drain tank 8, and the normal hydrophobic branch road 9 of low pressure is provided with the second normal hydrophobic adjustment 10.The normal hydrophobic branch road 9 of this low pressure installing additional, has increased hydrophobic flow, has reduced resistance, make hydrophobic unobstructed, test at full capacity through unit, the water level in drain tank and first lowly adds normal drain water piping 3 and second low to add the low bit comparison that adds water of normal drain water piping 4 stable, and low aerating side water level is normal.

The model of manufacturing taking Hitachi, Ltd is as subcritical, the single shaft of TCDF-33.5, resuperheat, twin-tub, double flow, condensing steam turbine are as example.Lowly add the low emergent drain pipeline that adds of #7 that emergent drain pipeline 2 is steam turbine, first lowly adds that #7 that normal drain water piping 3 is steam turbine is low adds normal drain water piping, second lowly adds low normal drain water piping, the normal delivery line that the normal hydrophobic branch road 9 of low pressure newly installing additional is #7 low-pressure heater of adding of #8 that normal drain water piping 4 is steam turbine.In actual application, low-pressure heater and drainage pump group in conventional design and drainage pump outlet adjustment door are removed, and drainage pump is carried out to type selecting again, according to accounting, unit at full capacity time the hydrophobic amount of No. 7 low plus hydrophobic pipelines be 45 t/h, No. 8 the low hydrophobic amount that adds normal drain water piping is 28 t/h, total hydrophobic amount is 73 t/h, consider that heating pipe in service leaks, new drainage pump type selecting flow is 134 t/h, consider the pressure drop of water of condensation in flow process, the drainage pump lift of new type selecting is 180m, necessary electromotor 132Kw, voltage is 380V, motor adopts variable frequency adjustment, guided wave radar water-level gauge is installed on drain tank 8, change drainage pump outlet pressure according to drain tank 8 middle water level self-regulation motor rotating speeds, export setting pressure transmitter on female pipe at drainage pump, OIS picture when the signal is far passed is controlled to collection, be convenient to operation monitoring.

Claims

1. steam turbine low-pressure drainage system of heater, comprise the low adding system of steam turbine (1), drain tank (8) and the coagulator (7) being connected with drain tank (8) by drain water piping, it is characterized in that: the low adding system of described steam turbine (1) respectively with the low emergent drain pipeline (2) that adds, the first low normal drain water piping (3) that adds is connected with the second low normal drain water piping (4) that adds, described the first low normal drain water piping (3) that adds is all connected with drain tank (8) with the second low normal drain water piping (4) that adds, the low emergent drain pipeline (2) that adds is directly connected with coagulator (7), the second described low normal drain water piping (4) that adds is provided with the first normal hydrophobic adjustment door (5), and the described low emergent drain pipeline (2) that adds is provided with emergent drain adjustment door (6).

2. steam turbine low-pressure drainage system of heater as claimed in claim 1, it is characterized in that: described low adding on emergent drain pipeline (2), be positioned at emergent drain and adjust door (6) and be provided with before a road and be connected to the normal hydrophobic branch road of low pressure (9) of drain tank (8), the normal hydrophobic branch road of low pressure (9) is provided with the second normal hydrophobic adjustment (10).