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Heat recovery system with multiple stages of deaerators

A heat recovery system and deaerator technology, applied in the direction of preheating, feed water heaters, chemical instruments and methods, etc., can solve the problems of increasing the initial investment of heater equipment, increasing the design parameters of high pressure heaters, etc.

Active Publication Date: 2018-10-09
CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] With the continuous development of technology, the parameters of the double reheating unit are gradually increasing. The reheating system in the above-mentioned existing technology can no longer meet the requirements. The parameters of the main steam are gradually increasing, and the parameters of steam extraction at all stages of the steam turbine are also increasing accordingly. The design parameters of the high-pressure heater are also gradually increased, which greatly increases the initial investment of the heater equipment

Method used

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  • Heat recovery system with multiple stages of deaerators
  • Heat recovery system with multiple stages of deaerators
  • Heat recovery system with multiple stages of deaerators

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Embodiment

[0149] The figure of the recuperation system provided with the multi-stage deaerator of the present invention is as follows image 3 shown.

[0150] Such as image 3 As shown, the heat recovery system of the present invention includes a condenser 44, a condensed water pump 43, a low-pressure heater (surface heater), a low-pressure feed water pump 49, a high-pressure feed water pump 48, a BEST machine 47, a high-pressure heater (surface heater) device), high-pressure deaerator 05 (hybrid heater), low-pressure heater 06 (hybrid heater), condensate piping system, low-pressure water supply piping system, high-pressure water supply piping system, heater drain piping system (including drain pump 46). In this heat recovery system, the main steam turbine has 7 stages of extraction steam, of which the first stage extraction steam comes from the exhaust steam of the ultra-high pressure cylinder, which is divided into two routes, one is the main engine primary extraction steam 300 to s...

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Abstract

The invention discloses a heat recovery system with a plurality of stages of hybrid heaters. Specifically, the heat recovery system comprises a BEST machine, five high-pressure heaters, five low-pressure heaters, the two to five hybrid heaters, boosting pumps and a condensate pump; each hybrid heater is configured with the corresponding boosting pump; the condensate pump is positioned between thelow-pressure heaters and a steam condenser; extraction steam of the first high-pressure heater is from a main steam turbine; the extraction steam of the second high-pressure heater to the fifth high-pressure heater is from the BEST machine; steam sources of the hybrid heaters are all from the BEST machine, wherein the steam source of the last stage hybrid heater is from the exhaust steam of the BEST machine; the extraction steam of the five low-pressure heaters is from the main steam turbine; and the last stage hybrid heater is connected with one of the low-pressure heaters, and the water supply of the last stage hybrid heater is from the low-pressure heater. According to the heat recovery system with the plurality of stages of deaerators, the circulating efficiency of the system is improved; the superheat degree of the steam is fully utilized; the project cost is reduced; the cold end loss of the steam is reduced; and the heat recovery system with the multiple stages of deaerators isparticularly suitable for the situation that the steam extracting steam of a plurality of heaters are close to the saturation pressure of the steam, and the feed water flow is large.

Description

technical field [0001] The invention relates to the field of power generation, and more specifically relates to a heat recovery system provided with a multi-stage deaerator. Background technique [0002] In modern power plants, the heat recovery system is usually used to increase the average temperature of the endothermic heat of the cycle and the temperature of the feed water entering the boiler, so as to improve the cycle efficiency of the thermal system. [0003] The typical reheating system diagram of the double reheating unit in the prior art is as follows figure 1 and figure 2 shown. In this system, the steam turbine has 10 levels of steam extraction, which are provided to 10 heaters respectively. The first level of extraction 30 is supplied to the No. 1 high plus 0, the second level of extraction 31 is supplied to the No. 2 high plus 1, and the third level of extraction 32 Provided to No. 3 High Adder 2, Fourth Stage Air Extraction 33 Provided to No. 4 High Adder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22D1/50
CPCF22D1/50
Inventor 罗建松刘鹤忠蒋健申松林
Owner CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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