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Multi-steam source hybrid low-pressure heater and its heating and deaeration boiler water supply system in power station

A technology for low-pressure heaters and boiler feed water, applied in feed water heaters, lighting and heating equipment, preheating, etc., can solve problems such as redundancy and weakening of oxygen removal functions, and achieve improved utilization, reduced head requirements, and simplified processes The effect of craft

Active Publication Date: 2018-10-02
SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, in the normal operation of the unit, the adoption of the technology of adding oxygen to the feed water poses a challenge to the standard deaerator of the original thermal system, and its deaeration function is weakened or even becomes redundant.

Method used

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  • Multi-steam source hybrid low-pressure heater and its heating and deaeration boiler water supply system in power station
  • Multi-steam source hybrid low-pressure heater and its heating and deaeration boiler water supply system in power station
  • Multi-steam source hybrid low-pressure heater and its heating and deaeration boiler water supply system in power station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The multi-steam source hybrid low-pressure heater of the present invention mainly includes: main condensate inlet 1, overflow orifice plate 2, porous water tank 3, hydrophobic and porous spray pipe 4, shaft seal leaking steam porous release pipe 5, low-temperature reheating steam Porous release pipe 6, porous release pipe 7 for low-temperature reheat steam, porous release pipe 8 for high-temperature and low-pressure steam such as leakage of door lever, condensate overflow pipe 9, condensate outlet 10, and housing 12.

[0067] The main condensed water inlet 1 is provided on the top of the housing 12, the condensed water outlet 10 is provided at the bottom, and the non-condensable gas discharge port 11 is also provided on the housing 12, as shown in Figure 1 (a), in the housing A plurality of porous water tanks 3 are arranged inside the body, and the plurality of porous water tanks 3 are arranged sequentially from top to bottom in the housing, and porous discharge pipes ar...

Embodiment 2

[0079] The multi-steam source hybrid low-pressure heater heating and deaeration boiler water supply system of the present invention mainly includes: boiler S1; steam turbine high-pressure cylinder S2; medium-pressure cylinder S3; low-pressure cylinder S4; generator S5; condenser S6; condensate pump S7 ; Multi-steam source hybrid low-pressure heater S8; secondary condensate pump S9; surface type medium and low pressure heater S10; boiler feed water pump S11; regulating valve S12; Device S15; external steam cooler S16; relay pump S17; the specific connection relationship is as follows:

[0080] After the outlet of the condenser S6 is connected in series with the condensate pump S7, it is connected with the main condensate inlet 1 of the multi-steam source hybrid low-pressure heater S8, and the condensate outlet 10 of the multi-steam source hybrid low-pressure heater S8 is connected in series with the secondary condensate pump S9 It is connected in series with the multi-stage sur...

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Abstract

The invention discloses a power station multi-steam-source mixing type low-pressure heater and a heating deoxygenation boiler feed water system thereof. A plurality of porous bleeders are arranged inside a heater shell, and the multiple porous bleeders correspond to different steam sources. An inlet of the multi-steam-source mixing type low-pressure heater is connected with a condenser, and an outlet of the multi-steam-source mixing type low-pressure heater is connected with surface type medium and low-pressure heaters. The multiple surface type medium and low-pressure heaters are sequentially connected in series to form multi-stage heating. Besides, an outlet of the tail-stage feed water heater is connected with an inlet of a boiler feed water pump. According to the boiler feed water flow direction, the boiler feed water pump of the boiler feed water system is arranged at the outlet of the tail-stage surface type medium and low-pressure heater. Through the power station multi-steam-source mixing type low-pressure heater and the heating deoxygenation boiler feed water system thereof, feed water terminal temperature differences are reduced, the loss of the cold end of the condenser is reduced, an oxygen extractor is omitted, and the economical efficiency and safety of a unit are further improved.

Description

technical field [0001] The invention relates to a hybrid low-pressure heater of a power station unit and a steam extraction heat recovery water supply system using the heater, in particular to a multi-steam source hybrid low-pressure heater of a power station unit and its heating and deoxygenating boiler water supply system. It is mainly applicable to the thermodynamic cycle system of subcritical and super(super)critical generator sets. Background technique [0002] In the thermodynamic cycle system of subcritical and ultra(super)critical generator sets, the steam generated by the boiler drives the steam turbine to do work, drives the generator to generate electricity, and then becomes exhaust steam, which is cooled by the condenser at the outlet of the low-pressure cylinder of the steam turbine and becomes condensed Water and condensed water are sent to the boiler again after being heated up, and then turned into steam in the boiler, and the cycle repeats. In order to ensu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22D1/32
CPCF22D1/32
Inventor 高岩张乐川栾涛高永芬彭吉伟苏乐
Owner SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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