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Waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method

A central heating and combined heat and power generation technology, applied in hot water central heating systems, heating systems, heating methods, etc., can solve problems such as high investment IGCC, improve economics, reduce water consumption, and increase energy utilization efficiency Effect

Active Publication Date: 2015-04-22
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] High investment is one of the main difficulties faced by IGCC promotion

Method used

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  • Waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method
  • Waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method
  • Waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, this embodiment is an IGCC cogeneration central heating system for recovering waste heat, which combines clean and efficient IGCC with steam extraction and heat supply of steam turbine, and uses steam extraction of steam turbine to drive an absorption heat pump, and recovers waste heat and smoke from exhaust steam of steam turbine The waste heat of the gas is centrally supplied by using the steam extraction heat of the steam turbine and recovering the waste heat. The central heat supply method is as follows: the air separation unit 1 generates oxygen, and after the coal is gasified with oxygen and steam in the gasifier 2, it passes through the gas cooler. 3 After cooling down, the purification device 4 removes pollutants such as sulfides, nitrides, and dust in the crude gas to become clean and medium-low calorific value coal-based gas (mainly CO and H 2 ), enter the gas turbine 5 to generate electricity, the gas turbine exhaust enters the wast...

Embodiment 2

[0035] Such as figure 2 As shown, the present embodiment is an IGCC cogeneration central heating system for recovering waste heat. The central heating method is as follows: the air separation unit 1 generates oxygen, and after the coal is gasified with oxygen and steam in the gasifier 2, After the gas cooler 3 cools down, the purification device 4 removes pollutants such as sulfides, nitrides, and dust in the crude gas to become clean and medium-low calorific value coal-based gas (mainly CO and H 2 ), enter the gas turbine 5 to generate electricity, the gas turbine exhaust enters the waste heat boiler 6 to generate steam to drive the steam turbine 7 to generate electricity, the steam turbine exhaust enters the condenser 8 and condenses after exchanging heat with circulating water, and the circulating water cools down in the cooling tower 9; from the steam turbine 7 The low-pressure steam is extracted, and the steam is divided into two paths. One path is used to heat the retur...

Embodiment 3

[0037] Such as image 3 As shown, the present embodiment is an IGCC cogeneration central heating system for recovering waste heat. The central heating method is as follows: the air separation unit 1 generates oxygen, and after the coal is gasified with oxygen and steam in the gasifier 2, After the gas cooler 3 cools down, the purification device 4 removes pollutants such as sulfides, nitrides, and dust in the crude gas to become clean and medium-low calorific value coal-based gas (mainly CO and H 2 ), enter the gas turbine 5 to generate electricity, the gas turbine exhaust enters the waste heat boiler 6 to generate steam to drive the steam turbine 7 to generate electricity, the steam turbine exhaust enters the condenser 8 and condenses after exchanging heat with circulating water, and the circulating water cools down in the cooling tower 9; from the steam turbine 7 The low-pressure steam is extracted, and the steam is divided into two paths. One path is used to heat the return...

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Abstract

The invention discloses a waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method. The system comprises an air separation unit, a gasification furnace, a gas cooler, a purification plant, a gas turbine, a waste heat boiler, an absorption heat pump and a heat exchanger, which are connected successively. An exhaust smoke outlet of the waste heat boiler is emptied or is connected with a smoke inlet of a smoke condensation heat exchanger; a steam outlet of the waste heat boiler is connected with an inlet of a steam turbine; an exhaust steam outlet of the steam turbine is connected with a steam inlet of a condenser; a circulating water outlet of the condenser is connected with a cooling tower; a low-pressure extracted steam outlet of the steam turbine is divided into three paths, two paths or one path of temperature drop, and heat supply network return water is conveyed to a heat supply network for use after being heated. The invention also provides a central heating method. Clean and efficient IGCC is combined with extracted steam heat supply of the steam turbine, the extracted steam of the steam turbine is used for driving the absorption heat pump, the exhaust steam waste heat of the steam turbine and the smoke waste heat are recycled, and the extracted steam heat of the steam turbine and the recycled waste heat are utilized for central heating. The recovery waste heat IGCC combined heat and power generation central heating system and method have the characteristics of cleanliness, high efficiency, mature technology, high recycled waste heat amount, and capability of recycling smoke condensate water.

Description

technical field [0001] The invention belongs to the technical field of cogeneration central heating, and in particular relates to an IGCC cogeneration central heating system and method for recovering waste heat. Background technique [0002] In recent years, many places in my country have encountered severe smog and severe air pollution. The air pollution index of some cities has exceeded the upper limit of the concentration of inhalable particulate matter, especially in the Beijing-Tianjin-Hebei region. Winter is a period of frequent haze weather, which shows that the formation of haze weather is closely related to winter heating. In order to control air pollution and alleviate the harm caused by severe smog, the government has proposed air control goals and corresponding policy measures. Treatment measures include reducing coal consumption and increasing the supply of clean energy such as electricity and natural gas; promoting gas-fired cogeneration to replace coal-fired ...

Claims

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Application Information

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IPC IPC(8): F01K17/02F24D3/18
CPCY02B30/00Y02E20/14
Inventor 周贤许世森史绍平王保民王剑钊
Owner HUANENG CLEAN ENERGY RES INST
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