"Gas to coal" to change back?

"Gas to coal" to change back?

Coal to gas "is not a new word, as early as the previous two years, all over the country has been the beginning of the implementation of the" gasification "program, but the effect is still not ideal.The industry believes that tight gas, supporting the implementation of funds is not in place, infrastructure is not perfect And other factors is restricting the "coal to gas" development bottleneck.One point is the most deadly natural gas, is the security issue.

           No. 1 .jpg

The main problem is "tight". Heat heating per ton of natural gas consumption of 80 cubic meters per hour, if the national heating boiler transformation half, bringing the demand growth of more than 50 billion cubic meters / year. Industrial areas, the paper alone point of view, if the 2013 papermaking enterprises all gas, the gas demand to bring more than 80 billion cubic meters.

With the country to continue to promote gas reform in 2014, China's apparent natural gas consumption will reach 200 billion cubic meters. 2013 China's gas supply gap is more than 100 billion cubic meters, the gap is particularly serious in North China. In order to solve the pressure of governance of air pollution, Beijing and Tianjin and other regions are fighting for gas sources, lack of gas, then the device is facing in place but no gas can send the plight.

China if set off a "gas on behalf of the coal" boom, the global price of natural gas must rise. At that time no gas available is more terrible than air pollution. Do not forget, import natural gas is to see people face Oh!

Natural gas (Natural Gas) is buried in the underground paleontology after hundreds of millions of years of high temperature and high pressure and other role in the formation of gas, is a colorless and tasteless non-toxic, high calorific value, stable combustion, clean and environmentally friendly high-quality energy. Natural gas is the main component of methane, calorific value of 8500 kcal / m 3 is a mainly composed of methane gaseous fossil fuels. It is mainly present in oil fields and natural gas fields, and there are a small amount of coal seam. The main component is methane, also contains a small amount of ethane, butane, pentane, carbon dioxide, carbon monoxide, hydrogen sulfide and so on. No hydrogen sulfide colorless odorless flammable and explosive gas, the density of more than 0.6 ~ 0.8g / cm3, lighter than air. Usually more than 90% methane is called dry gas, containing less than 90% methane is called moisture.

Coal gas reform can not fundamentally solve the air pollution will only increase the haze

This year, the country's coal boilers are in full swing to change gas. We do not understand why it is always winter to start to change? How many residents have to go through the Spring Festival heating has not burned it yet. And not to buy coal. The amount of heat generated by a ton of coal is about equal to 700 cubic meters of natural gas, if a year with 5 tons of coal heating need to use 3500 cubic natural gas, Langfang City, starting from 2015 to take the ladder gas price, the amount of 3500 cubic cubic, each cubic 3.36 yuan With 11760 yuan heating!

So, the question came, why not like Beijing to change the electric heating it? Are key countries now supplying electricity in place? Since the State Council issued the "Air Pollution Control Action Plan", all localities have put forward relevant measures, natural gas was put on the clean energy laurel. Many places "herd" on the large-scale implementation of the "coal to gas", and some places also forced enterprises to "change the gas", did not consider the use of other clean combustion technology, nor consider the natural gas supply of resources. Chinese Academy of Sciences, a professor that, regardless of China's national conditions and objective conditions of large-scale implementation of the "coal to gas", may bring a lot of problems.

Natural gas boiler pollution-free emissions is just a legend

Can not myth of natural gas, natural gas boiler on the control of nitrogen oxides without any advantage at all, the natural gas is said to be clean energy, itself is biased. Natural gas is also fossil energy, there are clean burning problems, mainly in the combustion process will produce a lot of nitrogen oxides.

According to the information released by the environmental protection department on the operation of natural gas boilers, the concentration of nitrogen oxides is less than 200 mg / m 3%, and less than 400 mg / m3 is 94%, and most of the natural gas Boiler nitrogen oxide emissions concentration of 300 mg / cubic meter. The semi-coke as the fuel decoupling combustion boiler, but can be nitrogen oxide emissions control to 200 mg / cubic meters, in addition, the gas boiler can be more nitrogen oxide control to 100 mg / cubic meters below.

Haze is the main component of PM2.5, the formation of PM2.5 is the culprit of nitrogen oxides, the current large-scale "coal to gas" in the use of natural gas boilers, the control of nitrogen oxides without any advantage at all. It is puzzling that the efforts to push around the "coal to gas" work, from the public records of the data, it is difficult to find the amount of nitrogen oxide emissions, "coal to gas" before and after what changes in nitrogen oxides.

As we all know, China is the oil, natural gas resources in poor countries. According to the National Energy Board is expected in 2015 China's natural gas consumption will reach 231 billion cubic meters, while the domestic natural gas supply is only 131 billion cubic meters, need to import 100 billion cubic meters.

Natural gas resources are controlled abroad, gas turbine blade manufacturing and repair technology is controlled abroad, fuel prices we have no right to speak. "Coal to gas" to spend a lot of money, increase the processing facilities have to spend money, but also long-term subsidies for natural gas fuel, which we should have a clear understanding. From this point of view, governance haze is not just an environmental issue, but a political issue.

Beijing took the lead in coal reform but air pollution remains the same

Beijing "coal to gas" success? Static weather, 48 hours Beijing will achieve serious pollution to Beijing, for example, the main city of Beijing, the vast majority of coal-fired boilers have been changed to gas boilers, but PM2.5 haze serious pollution not only did not eliminate, There is a further intensified trend. The reason is that the "coal to gas" a substantial increase in emissions of nitrogen oxides, combined with the exhaust emissions of automobile nitrogen oxides, Beijing PM2.5 haze increasingly serious root causes, and there are data that the Beijing air nitrogen The material is three times the sulfur dioxide.

During the winter heating period of 2013, the gas consumption of natural gas in Beijing was 7.8 billion cubic meters. According to the average nitrogen oxide emission concentration of 300 mg, the amount of nitrogen oxides emitted was 25740 tons, and the emissions were basically the same as that of automobile Million cars, the annual consumption of more than 700 million tons of gasoline and diesel, the total discharge of more than 90 million tons, of which more than 80,000 tons of nitrogen oxides in the heating period is also more than 20,000 tons.

 According to the planning and development plan of gas development in Beijing during the 12th Five-Year Plan period, the annual consumption of natural gas in Beijing will reach 60 billion cubic meters by 2015, the amount of nitrogen oxides emitted will be 198,000 tons, and the gas consumption in 2017 will reach 93 billion cubic meters , The amount of nitrogen oxides emissions will reach 306,900 tons, close to 15 times in 2013.

When Beijing is in the quiet wind or breeze in winter, the field of pollution on Beijing less affected, less than 48 hours of local air will reach serious pollution, that environmental pollution will soon reach the limit, when the nitrogen oxide emissions increased 15 times, imagine what degree of pollution will reach.

If the emission concentration is reduced to 20 mg / m3, it is only to maintain the current atmospheric level, in fact, if the city's natural gas boilers are to reach 20, if the concentration of nitrogen oxides is reduced by taking measures to assemble the environmental protection equipment Mg / m3 emission standards, investment is huge, almost impossible.

Haze days without falling back to the embarrassment that Beijing's "coal to gas" is not successful, and did not improve the atmospheric environment, in particular, did not reduce PM2.5 caused by haze pollution. In fact, the Beijing thermal power plant around the "coal to gas", resulting in more nitrogen oxides, PM2.5 more, will lead to the wrong way to go further. Chinese Academy of Engineering Ni Weidou made calculations, thermal power plant "coal to gas", the nitrogen oxide emissions will not only reduce, but will increase, but will deteriorate the haze of the situation