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Coal gasification technology and steam turbine power generation technology coupled method

A technology of coal gasification and steam, which is applied in the gasification of granular/powdered fuel, the petroleum industry, and the manufacture of combustible gas, etc.

Active Publication Date: 2013-10-16
ENN SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In other words, the above process of combining coal gasification and steam turbine power generation only utilizes the steam generated during the coal gasification process, that is, only the steam generated during the coal gasification process makes the coal gasification process and the steam turbine power generation process take place There is still room for improvement in the degree of energy integration and process integration

Method used

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  • Coal gasification technology and steam turbine power generation technology coupled method
  • Coal gasification technology and steam turbine power generation technology coupled method
  • Coal gasification technology and steam turbine power generation technology coupled method

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Embodiment

[0038] The method of the invention is illustrated by the following non-limiting examples.

[0039] refer to Figure 4 , taking the catalytic gasification of bituminous coal and supercritical water 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 process of preparing coal water slurry is not in Figure 4 drawn in. The coal-water slurry is pressurized, preheated to 23MPa, and enters the gasifier at 550°C, 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 650°C. In the supercritical state, coal and water react under the action of a catalyst to produce methane-rich synthesis gas. The main components of syngas are methane, carbon monoxide, c...

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Abstract

The invention discloses a coal gasification technology and steam turbine power generation technology coupled method, which comprises the following steps of: cooling a high-temperature reacted mixture removed from a coal gasifier by using water, using the generated high-temperature high-pressure steam in Rankine cycle for power generation, removing water and slag from the reacted mixture to obtain a synthetic gas, carrying out decompressional expansion on the synthetic gas and replacing routine cooling water to enter into a condenser in the Rankine cycle as a cooling medium for cooling waste steam. By the adoption of the method provided by the invention, the power generation efficiency of the Rankine cycle is raised.

Description

field of invention [0001] The invention relates to the field of polygeneration of coal, in particular to the field of gas-electricity cogeneration using coal as raw material. Background technique [0002] At present, coal gasification technology has been widely used in my country, but it is basically limited to the field of coal chemical industry, mainly to obtain tangible chemical products. In order to improve energy efficiency, the current development trend is to combine coal gasification technology with power generation technology, that is, to carry out so-called gas-power cogeneration, using coal as raw material to co-produce syngas, electricity and heat. Among them, the synthesis gas can be further burned to generate electricity, or further processed into chemical products (such as synthetic ammonia, methanol, dimethyl ether, liquid fuel, etc.). Such a gas-power cogeneration process organically combines chemical processes with power production, and has achieved huge so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46C10J3/72C10J3/84F01D15/10
CPCY02E20/18Y02P20/129
Inventor 谷俊杰李金来甘中学
Owner ENN SCI & TECH DEV