Combustion machine and steam turbine combined circulation system for gas boiler

A gas-fired boiler and circulation system technology, applied in the direction of joint combustion mitigation, etc., can solve the problems of unreasonable use, low net power supply efficiency, limited optional equipment, etc., and achieve high consumption ratio and boost power consumption Small and cost-effective

Inactive Publication Date: 2010-05-12
中航世新燃气轮机有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the method of increasing the output of the gas turbine-steam turbine combined cycle power generation system using low calorific value gas fuel is to increase the power specification of the low calorific value gas turbine or to increase the auxiliary medium pressure boiler. The optional equipment is limited and the price is high; Due to the unreasonable use of medium-calorific-value fuels and low-calorific-value fuels, the net power supply efficiency of the existing combined cycle system is not very high. Therefore, it is necessary to propose a new gas turbine-steam turbine combined cycle using gas-fired boilers system

Method used

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  • Combustion machine and steam turbine combined circulation system for gas boiler
  • Combustion machine and steam turbine combined circulation system for gas boiler
  • Combustion machine and steam turbine combined circulation system for gas boiler

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Embodiment 1

[0020] see figure 1 , the gas turbine-steam turbine combined cycle system of the present invention has a gas boiler, a gas turbine device, and a steam turbine device, and the combustion-supporting air inlet 3083 at the bottom of the gas boiler 300 passes through a hot air duct 200 and the turbine exhaust port of the gas turbine device 100 101 communication, the turbine exhaust of the gas turbine device directly enters the negative pressure combustion furnace of the gas boiler as combustion air to participate in combustion, the superheated steam outlet 301 of the gas boiler communicates with the steam inlet device of the steam turbine 400, and the gas boiler produces The superheated steam is converted into mechanical energy in the steam turbine device; the gas-fired boiler uses blast furnace gas as the main fuel, and the furnace body of the gas-fired boiler is equipped with a negative pressure combustion furnace 309, a water wall device 310, a superheated grate 302, and a combus...

Embodiment 2

[0035] A gas turbine-steam turbine combined cycle system using a gas boiler, comprising a gas boiler, a gas turbine device, and a steam turbine device, the combustion-supporting air inlet at the lower part of the gas boiler communicates with the turbine exhaust port of the gas turbine device through a hot air duct, The superheated steam outlet of the gas boiler communicates with the steam turbine intake device; the gas turbine device has a heat value of 5000-36000KJ / NM 3 combustible gas as fuel; the gas-fired boiler uses natural gas, blast furnace-converter mixed gas, underground gasification gas, coal gas, coal bed methane, chemical tail gas, and biogas as fuel, and the furnace body of the gas-fired boiler It is equipped with a negative pressure combustion furnace, a water wall device, a superheated grate, and a combustion device, and the upper part of the gas boiler is provided with a steam drum.

[0036] In this embodiment, the structures of the gas boiler, gas turbine devi...

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Abstract

A gas turbine and steam turbine combined circulation system using gas boiler is composed of a gas turbine unit, a steam turbine unit, and a gas boiler using blast furnace gas as main fuel and with a combustion promoting air inlet connected to the exhaust outlet of gas turbine unit and an over-heat steam outlet connected with the steam inlet of steam turbine. Said gas boiler consists of negative-pressure combustion box, water cooled wall, over-heat grate, burner and steam drum.

Description

technical field [0001] The invention relates to a gas turbine-turbine combined cycle system using a gas boiler. The gas boiler in the system uses the blast furnace gas produced by the ironmaking blast furnace of an iron and steel enterprise as fuel, which can improve the efficiency of the combined cycle system and reduce the cost of the iron and steel enterprise. Background technique [0002] In the prior art, Chinese patent 98116785.3 discloses a complete set of exhaust gas reheating combined cycle power generation device, which combines a boiler and a steam turbine device with a gas turbine device, so that the exhaust gas from the above gas turbine device is in the boiler After being heated, it is used as a heat source to supply the condenser and water supply system of the steam turbine. The cooling steam recovery system in which partially cooled steam is recovered by the intermediate stage of the medium-pressure turbine can effectively recover the cooled steam and further...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K23/06F02C6/18
CPCY02E20/16
Inventor 苏大为
Owner 中航世新燃气轮机有限责任公司
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