Coal mine gas engine products

Coal mine gas is a mixture of methane, carbon dioxide, and nitrogen that escapes from coal and the surrounding rock. Gas is the harmful factors in the production of coal mines. It not only pollutes the air, but also can cause explosions when the gas content in the air is between 5% and 16%. Coal mine gas is also a kind of high-quality energy, which is clean, high in thermal efficiency, and less pollution. Coal mine gas is used for power generation, and waste heat recovery equipment is used for recovering the heat of engine exhaust. Therefor it can realize cogeneration, develop a recycling economy. It can not only reduce environmental pollution, benefit the environment, reduce greenhouse gas emissions, but also can ease the contradiction between supply and demand of electricity, reduce production costs, increase the efficiency of enterprises, and increase the competitiveness of enterprises.

Coal mine gas engine products (600kW/700kW/1100kW/1500kW)

CNPC’s Jichai coal mine gas power generation products were first used in the Jincheng area in 2003. Since 2005, the company has increased investment in R&D of coal mine gas power generation products, focusing on communication and cooperation with relevant scientific research institutes in coal mines, and coal bed methane in China. The Society, Henan Polytechnic University, Fushun Coal Science General Institute and coal design institutes have established close ties, and developed eight types of proprietary high and low concentration coal mine gas power, with power coverage of 200-1100kW, and adopting advanced international gas engines. The control technology and lean combustion theory aim at the characteristics that the gas concentration fluctuates greatly during the process of domestic gas extraction. Through the reasonable matching of the intake system, the gas turbine unit has a wider adaptability and can bum 8%-60% of the methane concentration, gas pressure in the range of 3-15KPa. Its power, economy, safety and reliability have reached the international advanced level. Distributed in 13 major coal-producing areas, the Shanxi market alone has accumulated a total of more than 400 sets of gas (CBM) equipment.

Production characteristic

    Production code �?1512W�?016W�?016W,4020W

    100% independent intellectual property

    International mainstream control technology (engine intelligent management system)

    International advanced air-fuel ratio control technology (TECJECT air-fuel ratio automatic adjustment)

    High-flow, high-pressure intake system adapts to wide variations in concentration (30% to 60% methane concentration)

    Low-pressure air intake and lean combustion control technology (for low pressure gas, better emissions)

    Advanced crew management module (automatic synchronization and automatic load distribution)

    Online Maintenance Technology (More than 2500 hours of continuous trouble-free operation)

    Digital Monitoring Technology (Full monitoring of engine thermal parameters and unit electrical parameters)

    Distributed Energy Systems (Electric-Thermal, Electric-Hot-Cool)

Typical Generator set Technical Specifcation

Typical Generator set Technical Specifcation

Gas quality requirements�?br/>Gas pressure : �?400kpa Total sulfur content �?480mg/m3 Hydrogen sulfide content : �?br/>20mg/m3 Impurity particles : �?0.005mm, Impurity content : �?0.03g/m3 Dust content : �?10mg/m3
Before use, the gas should be passed through a gas-water separator, a flter and a surge tank. The separator
should periodically drain away the condensed liquid to ensure that there is no liquid in the gas.
Oil and water composition: After the flter, the particle size of the gas in the gas is less than 5um, the
content is not more than 0.03g/m3, the temperature of the gas is 0~65C, the porcelain tube is recommended, the
paper core flter: the capacity of the surge tank is about 1m3, and should be set There is a safety valve. When
multiple units are used together, they can share a larger capacity surge tank.
gas ingredient requirement�?br/>CH4: �?76% C2H6: < 10% C3H8: < 8% C4H10: < 6%
The reference data table of standard gas composition

Iubrication oil requirement�?br/>The engine is recommended to use the Kunlun KCN7805.KCN7810 gas engine oil product according to its
operating conditions. The gas quality used satisfes the requirements of Class I and II in 287820-1999, the sulfur
content is �?200mg/rm3, and KCN7805 is recommended;
The quality meets the three requirements in GB17820-1999, ie the sulfur content is less than or equal to
460mg/m3. The recommended use of KCN7810: When the sulfur content is >460mg/m3, consult the company
or the oil supplier.
Cooling water requirement�?br/>Slightly alkaline clean water should be used. It must not contain corrosive compounds such as chlorides,
sulfates or acids. The main indicators are as follows :
hardness 0.7~5.3me/L
Chloride ion content<150mg/L
PH 7~8.5
The requirement of engine to gas /lubrication oil and cooling water