In recent years, there have been many high-yield biogas projects, which are far larger than the amount of gas needed for self-use. The excess biogas often goes into the boiler and is not completely extinguished or even directly discharged, resulting in environmental pollution and resource waste. At present, energy saving and emission reduction are getting worse, biogas purification is an inevitable trend.
1. It is the demand of developing renewable energy and improving energy structure that conforms to the national industrial policy.
At present, China has become the second largest energy consumer. The consumption and use of fossil fuels cause serious environmental problems such as greenhouse effect, acid rain and ozone layer destruction. The Outline of the Twelfth Five-Year Plan for National Economic and Social Development put forward that we should promote the innovation of energy consumption structure and application mode, and promote energy diversification and clean development. Following the implementation of the Natural Gas Application Policy, the relevant departments issued a series of policies, such as the Guiding Opinions on the Development of Natural Gas Disseminated Energy, indicating the Chinese Government's determination and will to develop "Gas Energy", vigorously promote energy conservation and emission reduction, and actively develop a low-carbon economy. As a kind of clean gas energy, bio-natural gas, with its characteristics of recycling environmental protection, turning waste into treasure, by-products can be applied, low cost, mature technology and easy implementation, has made great achievements in supplementing the lack of gas energy in China.
2. Extend the industrial chain, enhance added value and improve the competitiveness of enterprises
Due to the slowdown of world economic growth, the downturn of domestic and foreign product markets, the intensification of market competition from time to time, as well as the factors of policy adjustment and the fall of subsidies, the profit margin of enterprises has been squeezed. The purification of bio-natural gas can prolong the company's product industry chain and enhance the added value of products, which is one of the effective ways to enhance the competitiveness of enterprises.
3. Demand for reducing greenhouse gas emissions
As the increasingly serious trend of global warming has attracted worldwide attention, greenhouse gas emission reduction is becoming more and more urgent. Both the 2007 United Nations Climate Change Conference in Bali, Indonesia, and the 2009 G20 Summit have made reducing fossil energy consumption and developing renewable energy as their top priorities. The greenhouse gas effect of CH4 is 21 times that of CO2, and 20% of the global greenhouse gas effect comes from methane. If biogas is not effectively applied, it will become the main culprit of greenhouse effect. Taking the daily application of biogas purification to produce 60,000 cubic meters of biogas as an example, the annual emission reduction of greenhouse gases is equivalent to about 458,000 tCO2, which shows that biogas purification is of great significance to achieve the goal of energy saving and emission reduction in China.
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