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Method for solving combined heat and power generation, split-shaft heat supply turbine generating set, and operating method of split-shaft heat supply turbine generating set

A turbogenerator set and combined heat and power generation technology, which is applied in the direction of steam engine devices, engine components, machines/engines, etc., can solve problems such as expensive and complex structures, and achieve the goals of reducing cost, improving reliability, and improving operation flexibility Effect

Inactive Publication Date: 2014-06-25
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 heat supply turbine generating set, and operating method of split-shaft heat supply turbine generating set

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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, heat user demand parameters are 0.4MPa, 180°C, maximum 80.32t / h, average 60t / h minimum 12.5t / h;

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

[0032] Determine the external power supply parameters according to the demand parameters of elec...

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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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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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