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Power generation method, and device for gasified production of energy products and thermal power generation

A technology for producing energy and products, which is applied in the field of gasification to produce energy products and thermal power generation devices, can solve problems such as insufficient utilization of system energy, and achieve the effect of improving energy utilization efficiency and power generation efficiency

Active Publication Date: 2012-06-27
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy of the system is not fully utilized

Method used

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  • Power generation method, and device for gasified production of energy products and thermal power generation
  • Power generation method, and device for gasified production of energy products and thermal power generation
  • Power generation method, and device for gasified production of energy products and thermal power generation

Examples

Experimental program
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Effect test

Embodiment 1

[0052] see figure 1 , taking the catalytic gasification of bituminous coal and supercritical water with water as the working medium for power generation as an example. Coal is crushed and ground to make coal powder with a particle size of less than 150 microns, and the catalyst Na 2 CO 3 (consumption amount is 10% of coal powder mass) and water to prepare coal water slurry with coal powder dry base concentration of 40%. The coal-water slurry is pressurized, preheated to 23MPa, and enters the reactor at 550°C (the reactor is a gasifier in this embodiment), and oxygen is introduced into the gasifier at the same time (the gasification agent in this embodiment is oxygen ). Part of the coal-water slurry reacts with the added oxygen in the gasifier, raising the temperature to 650°C. In a supercritical state, coal and water react under the action of a catalyst to generate a mixed gas rich in methane. The main components of the mixed gas are methane, carbon monoxide, carbon diox...

Embodiment 2

[0054] also refer to figure 2 , using water as the working medium for power generation, taking the supercritical water gasification of bituminous coal as an example. The bituminous coal is ground into a 50% coal-water slurry by a wet grinder, and then sent to the gasifier (the reactor in this embodiment is a gasifier) ​​through a pump under pressure. At the same time, oxygen or air is fed into the gasification furnace as a gasification agent. The operating temperature of the gasification furnace is about 750° C. and the operating pressure is 27.0 MPa. Coal reacts with the above-mentioned gasifying agent at high temperature to generate gas rich in carbon monoxide, hydrogen, carbon dioxide, and methane. The post-reaction mixture exiting the gasifier includes coal gas, tar and unreacted gasification agent. The reacted mixture is exchanged with 23MPa water from the booster pump in the second heat exchanger, and the pressurized water is turned into high-temperature and high-pres...

Embodiment 3

[0056] see figure 2 , using water as the working medium for power generation, taking the catalytic gasification of lignite and supercritical water as an example. The coal is prepared into a coal water slurry with a particle size of less than 150 microns through a wet mill, the concentration of the coal water slurry is 35%, and the coal water slurry contains catalyst K 2 CO 3 (The amount is 3% of the pulverized coal quality). The coal-water slurry is pressurized, preheated to 35MPa, and enters the gasifier at 450°C (the reactor in this embodiment is a gasifier), and oxygen is introduced into the gasifier at the same time. Part of the coal-water slurry reacts with the added oxygen in the gasifier, raising the temperature to 570°C. In a supercritical state, coal and water react under the action of a catalyst to generate a mixed gas rich in methane. The main components of the mixed gas are methane, carbon monoxide, carbon dioxide, hydrogen and so on. The gasifier products in...

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Abstract

The invention provides a power generation method, comprising a step of condensing exhausted steam generated in the power generation process, wherein a heat exchange operation is directly or indirectly carried out between the exhausted steam and gas obtained after expanded depressurization. The invention further provides a device for gasified production of energy sources and thermal power generation. The device comprises an expansion depressurization device and a condenser, wherein the expansion depressurization device comprises an expansion depressurization inlet for receiving gas to be subjected to an expanded depressurization operation, and an expansion depressurization outlet for discharging the gas subjected to the expanded depressurization operation; and the condenser comprises a first heat exchange channel in which a cooling medium with the refrigerating capacity of the gas subjected to the expanded depressurization operation enters, and a second heat exchange channel in which the heat exchange operation is carried out between the exhausted steam generated in the power generation process and the cooling medium. According to the method and the device disclosed by the invention, the refrigerating capacity generated by the gas subjected to the expanded depressurization operation is used, so that the temperature of the exhausted steam is reduced below an environmental temperature, therefore the pressure energy of the gas is sufficiently used, and the power generation efficiency of turbine power generation equipment is improved.

Description

technical field [0001] The invention relates to a power generation method and a device for producing energy products by gasification and thermal power generation. Background technique [0002] IGCC (Integrated Gasification Combined Cycle) technology realizes the combination of coal gasification and gas-steam turbine combined power generation system, and is a clean coal power generation technology. The treated coal and the oxygen from the air separation unit generate mixed gas in the gasifier. The sensible heat of the mixed gas is recovered to generate steam. After the mixed gas is purified by the purification unit, it is burned to drive the gas turbine to generate electricity. The heat energy of the flue gas discharged from the gas turbine The waste heat boiler is recovered and heated to generate steam, and the steam drives the steam turbine to generate electricity. In the IGCC process, the product stream of mixed gas first passes through the Brayton cycle of the gas turbin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K17/06F01K19/00
Inventor 谷俊杰李金来甘中学张玉宝王青
Owner ENN SCI & TECH DEV
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