Method for solving combined heat and power generation, split-shaft heating steam turbine generator set and operation method

A technology of steam turbine generator and heating steam turbine, which is applied in the direction of steam engine devices, engine components, machines/engines, etc., which can solve the problems of complex structure and expensive price, and achieve the goal of improving reliability, reducing cost, and improving thermal efficiency of power generation Effect

Inactive Publication Date: 2016-02-17
HENNAN ELECTRIC POWER SURVEY & DESIGN INST
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Problems solved by technology

[0004] In order to solve the problem of complex structure and very expensive grids when single-shaft steam turbines realize combined heat and power, the present invention provides a method for solving combined heat and power by using conventional steam turbine generator sets, and provides a split-shaft type combined heat and power Turbine

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  • Method for solving combined heat and power generation, split-shaft heating steam turbine generator set and operation method

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Embodiment Construction

[0027] A method for solving cogeneration of heat and power by using a conventional steam turbine generator set, comprising the following steps:

[0028] A. Select at least one back-pressure steam turbine or extraction back-pressure steam turbine, and at least one pure condensing low-pressure steam turbine for combined heat and power generation. Type steam turbine or extraction backpressure steam turbine is the front turbine, and pure condensing low-pressure steam turbine is the rear turbine; typical cases are described below.

[0029] B. Determine parameters:

[0030] Determine the heat user demand parameters, for example, the heat user demand parameters are 0.4MPa, 180°C, the maximum is 80.32t / h, the average is 60t / h, and the minimum is 12.5t / h;

[0031] Determine external heat supply parameters according to heat user demand parameters, 0.6MPa, 200°C, maximum 80.32t / h, average 60t / h minimum 12.5t / h;

[0032] Determine the external power supply parameters according to the de...

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Abstract

Disclosed is a method for solving combined heat and power generation, a split-shaft heat supply turbine generating set, and an operating method of the split-shaft heat supply turbine generating set. The split-shaft heat supply turbine generating set comprises at least two turbines, including front turbines and rear turbines; each front turbine is a backpressure turbine or extraction backpressure turbine; each rear turbine is an all-condensing low-pressure turbine; the front turbines and the rear turbines are connected through a pipeline; a to-user pipeline is disposed on the pipe for connecting the front and rear turbines; the pipelines are controlled through a pipeline controller; each front turbine is provided with one turbine generator; each rear turbine is provided with one turbine generator and a condenser. The backpressure turbine and low-pressure parameter all-condensing turbine technology is utilized, the two types of turbines are subjected to split-shaft combination, and backpressure, extraction condensing and all-condensing operations can be achieved; in the backpressure operation mode, heat and power generating efficiency of the set can be greatly increased; in the extraction condensing or all-condensing operation mode, operational flexibility of the set can be greatly improved.

Description

technical field [0001] The invention belongs to the field of power generation, in particular to a steam turbine generator set. Background technique [0002] In the thermal power industry, conventional turbogenerators used for cogeneration of heat and power are generally divided into back-pressure, pumping-back, and extraction-condensing steam-generating units. When the load is lower than a certain range, it cannot generate electricity, and the operation flexibility of the back pressure unit is poor; although the extraction and condensing unit can extract steam for heating, it can also operate in pure condensation, and has strong operation flexibility, but the low-pressure rotor drum The temperature rise caused by wind loss will directly affect the safety of the unit operation. It is necessary to ensure that the low-pressure cylinder has a cooling flow. This part of the cooling flow pushes the low-pressure rotor to do work and then discharges into the condenser, where it rele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D15/10F01D17/00F01K11/02
Inventor 潘诚程祖田王哲韦迎旭
Owner HENNAN ELECTRIC POWER SURVEY & DESIGN INST
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