A waste heat utilization system of exhaust steam from a condensing steam turbine driving an induced draft fan

A small steam turbine, condensing steam technology, applied in steam applications, machines/engines, mechanical equipment, etc., can solve the problems of large investment in the construction of condensing induced draft fan small steam turbine systems, heavy operation and maintenance workload, and restrictions on widespread promotion. , to achieve the effect of increasing energy saving, eliminating construction costs and saving investment

Active Publication Date: 2016-03-02
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Generally speaking, the small steam turbine system of the condensing induced draft fan put into operation in the power plant has a large investment in construction, a large workload in operation and maintenance, and a complex system, which greatly limits its widespread promotion

Method used

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  • A waste heat utilization system of exhaust steam from a condensing steam turbine driving an induced draft fan
  • A waste heat utilization system of exhaust steam from a condensing steam turbine driving an induced draft fan

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 and figure 2 As shown, the present invention includes a main steam turbine 5 and a condensing small steam turbine 1 connected to the induced draft fan 2, the steam exhaust outlet of the condensing small steam turbine 1 is connected with the small steam turbine condenser 3, and the steam exhaust outlet of the main steam turbine 5 is sequentially It is connected with the main engine condenser 6, condensate pump 7, condensate polishing device 8, shaft seal cooler 9 and the low-pressure heat recovery system; the outlet of the shaft seal cooler 9 is also connected to the small The cooling water inlet of the steam turbine condenser 3 is connected, the cooling water outlet of the small steam turbine condenser 3 and the condensed water outlet pipeline of the small steam turbine condenser 3 merge in the condensed water return pipeline, and th...

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Abstract

A steam discharge waste heat utilization system of a condensing type small turbine for driving an induced draft fan comprises a main turbine and the condensing small turbine connected with the induced draft fan. The steam outlet of the small turbine is connected with the condenser of the small turbine. The steam outlet of the main turbine is sequentially communicated with a mainframe condenser, a condensing water pump, a condensate polishing device, a shaft-sealing condenser and a low-pressure regenerative system. The outlet of the shaft-sealing condenser and the condensate outlet pipeline of the condenser of the small turbine converge at a condensate return pipeline. The outlet of the condensate return pipeline is connected with the low-pressure regenerative system. The steam discharge and waste heat utilization system has the advantages that mainframe condensate is used as the cooling water source of the condenser of the small turbine, steam discharge waste heat of the small turbine can be fully recycled, total system cold source loss is reduced, and the system is relatively simple, small in operation and maintenance workload, and universal for water cooling units and air cooling units.

Description

technical field [0001] The invention belongs to the field of power plant boiler and steam turbine systems, and in particular relates to a condensing type small steam turbine exhaust waste heat utilization system for driving an induced draft fan. Background technique [0002] With the increasing capacity of coal-fired power plants and the in-depth promotion and implementation of environmental protection transformation, the capacity of boiler induced draft fans has also increased. The increase in the capacity of the induced draft fan has brought about problems such as increased plant power consumption, large starting current, and the need to increase the plant power voltage level. In order to make full use of primary energy, tap the potential of boilers and steam turbines, and improve the power supply capacity of the unit, it has become a trend to use small steam turbines instead of electric motors to drive induced draft fans. There are two commonly used small steam turbines:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K17/06F01D15/08
Inventor 许朋江居文平杨寿敏马汀山程东涛李永康陈恺任丽君刘杨
Owner XIAN THERMAL POWER RES INST CO LTD
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