Hengyang's first landfill gas biogas power station formally connected to the grid for power generation

The first landfill gas biogas power station in Hengyang City was officially connected to the grid for power generation at the Jixing Domestic Waste Landfill. The reporter saw yesterday at the Jixing Domestic Garbage Landfill Site that the old garbage odor that has caused the surrounding residents to scream but can't help but is now turning into a "green" fuel for electricity production, realizing waste utilization, eliminating pollution, and reducing energy consumption and emissions. And other win-win goals.

The power generation capacity can be used by 3,000 households

According to Dong Zhongxian, director of Datang Huayin Hengyang Environmental Protection Power Generation Co., Ltd., the Jixing Domestic Landfill Biogas Power Generation Project was launched in March last year and officially began power generation on September 27 last year. The total investment of the project is more than 10 million yuan, and the daily generating capacity is about 28,880. Kilowatt-hour is the first use of landfill biogas power station in our city. Datang Huayin Hengyang Environmental Protection Power Generation Co., Ltd. is responsible for investment, operations and management. The main process of the power plant is configured as an internal combustion engine (biogas) power generation line. A total of biogas generators and biogas pretreatment equipment are installed, and 33 pumping wells are implanted in the garbage dump. The biogas can be extracted continuously and sent to the collection pipeline network. The generator set, after pretreatment, uses the generated pure biogas to generate electricity by combustion.

“In China, the development and use of new energy is becoming an important part of the national energy strategy. The on-grid production of this project will surely become a landmark template and paradigm for the new energy market.” Datang Huayin Hengyang Environmental Power Generation Co., Ltd. Technician Mi Guoqiang stated that after the power plant is put into use for three months, the current installed capacity is 1200 kilowatts, which can generate about 28,880 kilowatt-hours per day. According to each household's electricity consumption of 8 kwh per day, it can meet the electricity demand of more than 3,000 households. This data will also increase year by year.

Turn waste into treasure, waste odor input power station when energy

According to Yang Tiegen, director of the Municipal Sanitation Department Waste Transportation Center, the Jixing Domestic Waste Landfill at the junction of Zhangmu Township and Zhangmu Town in Hengyang County was established in 1998 and handles more than 800 tons of domestic garbage every day in Hengyang City. Since all garbage is disposed by landfill, after landfills undergo a series of physical and chemical changes and biodegradation, a large amount of landfill gas is generated. The main component is methane, which is methane, which is unpleasant to smell, and it seriously pollutes the atmosphere and the surrounding environment. The hydrogen gas contained in biogas is also a highly toxic gas. However, this gas has a high use value. After the experts' argumentation and the determination of the relevant departments in the city, the project of using the landfill gas to generate electricity to access the Internet was determined.

“Jixing landfill gas power plant, as a pilot project for new energy in our city, has created a precedent for the environmental protection and utilization of landfill gas in our city.” Mi Guoqiang analyzed that landfill is the main mode of urban landfill disposal in China. The landfilling method will generate a large amount of biogas, and about 50% of the biogas is methane, which is not only flammable and explosive, but also has great environmental damage. He said: “Using biogas generated from waste to generate electricity, and eliminating potential safety hazards and environmental hazards caused by direct biogas emissions, we can achieve good economic benefits. At the same time, we will achieve the recycling of energy and the protection of the ecological environment, in line with the construction of environmentally friendly, The overall requirements of a resource-saving society."

Power station visits, shafts 15 meters underground to collect biogas

The reporter saw yesterday at the Jixing landfill site that various pipes were densely connected like a spider web. Many pipes were connected at one end to the shaft's mouth and the other end to the landfill power plant. Even if you stand in a landfill, you cannot smell the odor of garbage. Into the power plant, a blue generator set rumbling, running smoothly.

According to Mi Guoqiang, the main component of biogas produced after landfills is landfill is methane, and the vertical wells in landfills are gas wells. Currently, there are 33 in total. These gas wells go deep into the landfills 15 to 33 meters deep underground. The collected methane gas will be sent to gas generators in the plant for power generation after removing impurities such as water and water. After the power plant is completed and put into production, it can completely eliminate potential safety hazards and environmental pollution.