Principle: Under the conditions of high temperature, high pressure and lack of oxygen, coal undergoes gasification reactions to generate a gas mainly containing carbon monoxide (CO) and hydrogen (H₂), that is, syngas.

Technical routes:

Fixed bed gasification: The coal is placed in the gasifier, and the heat generated by combustion causes the coal to have gasification reactions.

Fluidized bed gasification: The coal and the gasifying agent carry out gas-solid fluidization reactions in the gasifier.

Pulverized coal gasification: Pulverized coal and the gasifying agent carry out gas-solid reactions in the gasifier.

Location: A large pig farm in Shanzhou District, Sanmenxia, Henan Province

Date: The "coal-to-gas" project was implemented in 2016 and later converted to an air source heat pump in 2017

Heating Area: Approximately 5,600 square meters

Implementation:

Initial Renovation: Converted the coal-fired boiler to a gas-fired boiler, but the operating cost was high, approaching 400,000 yuan per heating season.

Follow-up Renovation: Due to high and unstable gas prices, the decision was made to switch to an air source heat pump for heating. The project was equipped with 5 ultra-low-temperature air source heat pump heating units with a total power of 104.25 KW.

Principle: The purified and regulated syngas enters the synthesis reactor for catalytic reaction, thereby generating natural gas or liquefied petroleum gas.

Technical routes:

Fischer-Tropsch synthesis: The syngas is subjected to low-temperature synthesis through a catalyst to obtain natural gas rich in methane.

Principle: The syngas is treated with dust removal, sulfur removal, nitrogen removal, dehydration, etc., to obtain high-purity and high-quality natural gas or liquefied petroleum gas.

Process: It mainly includes links such as purification, regulation, compression, and storage to ensure that the syngas product meets national standards and user requirements.