Coal-fired power plant boiler under-pressure gas blending combustion system

By installing pressure reducing equipment upstream of the boiler in a coal-fired power plant, the problem of pretreatment of high-pressure combustible gases in the boiler was solved, enabling safe co-firing and energy recovery, and improving combustion efficiency and energy utilization.

CN223840399UActive Publication Date: 2026-01-27HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202520411494.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-10
Publication Date
2026-01-27
Estimated Expiration
2035-03-10

AI Technical Summary

Technical Problem

In the existing technology, the problem of how to treat high-pressure combustible gases before they enter the boiler of a coal-fired power plant to meet the requirements of combustion has not been effectively solved.

Method used

Pressure reducing equipment, including a gas turbine, a turbine power generation unit, a regulating valve, or a gas storage tank, is installed upstream of the boiler. These devices reduce the pressure of the high-pressure combustible gas before sending it into the boiler for combustion. The gas turbine generates electricity and recovers heat energy, the turbine power generation unit generates electricity using pressure, and the regulating valve and gas storage tank regulate the pressure to meet the co-firing requirements.

Benefits of technology

It achieves safe co-firing of high-pressure combustible gases, meets boiler combustion conditions, recovers energy and generates electricity, reduces gas pressure, and improves combustion efficiency and energy utilization.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model belongs to the technical field of blending combustion carbon reduction of a thermal power plant, and particularly provides a coal-fired thermal power plant boiler under-pressure gas blending combustion system, which is characterized by comprising a power station boiler (1), a steam turbine generator (3), a gas supply device (4), a gas supply device (5), a gas supply device (6), a gas supply device (7) and a gas supply device (8), and the power station boiler (1) is used for burning coal to produce steam and supplying the steam to the steam turbine generator (3). The pressurized combustible gas comes from hydrogen prepared by coal gasification or mixed gas of certain components; and the pressure reducing equipment is arranged at the upstream of the power station boiler (1) and is used for feeding the pressurized combustible gas into the power station boiler (1) after reducing the pressure of the pressurized combustible gas. In the system, the power station boiler (1) uses coal as main fuel to produce steam, combustible gas can also be combusted to support combustion or replace part of coal, the pressure reduction equipment reduces the pressure of the pressurized combustible gas and then feeds the pressurized combustible gas into the power station boiler (1) to be combusted, and the pressure requirement of blending combustion is met.
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