author: anonymous
china's annual cement production is huge, which also brought a lot of pollutant emissions. china's cement industry emissions of dust accounted for 39% of the total industrial dust emissions, nitrogen oxides accounted for 10% of the total emissions of 12%. in the 2015 proposed "thirteen" ecological civilization construction goals also include the control of nitrogen oxides and dust emissions, the cement industry is facing severe environmental pressure.
china's annual cement production is huge, which also brought a lot of pollutant emissions. china's cement industry emissions of dust accounted for 39% of the total industrial dust emissions, nitrogen oxides accounted for 10% of the total emissions of 12%. in the 2015 proposed "thirteen" ecological civilization construction goals also include the control of nitrogen oxides and dust emissions, the cement industry is facing severe environmental pressure.
in the new "cement industry air pollutant discharge standards" after the implementation of the cement industry, nitrogen oxides and dust emissions standards tightened. to dust emissions, for example, from the original standard 50mg / nm3 tightened to 30mg / nm3, part of the key areas to implement 20mg / nm3 emission standards.
however, as mentioned above, the total discharge of pollutants in the cement industry is still huge. to this end, in the cement industry to implement more stringent environmental standards of the voice is also growing. in particular, the coal industry has several classes to achieve ultra-low emissions in the background, some of the industry cement companies and environmental protection equipment companies began to call the cement industry should gradually implement ultra clean emissions, namely: nitrogen oxide emissions down to 50mg / nm3 look, dust emissions fell below 10mg / nm3.
at present, some of the advanced domestic cement enterprises, such as jinyu dingxin, the earth cement, cement in henan area has gradually reduced the dust emissions to 10mg / nm3 below. especially jinyu dingxin kiln dust emission concentration even reduced to 1.23mg / nm3, long-term implementation of higher than the national emission standards. in addition, henan earth cement as a private enterprise, but also actively assume environmental responsibility, dust emissions have remained at 10mg / nm3 the following.
so, the current domestic cement industry to implement ultra-clean emissions is realistic? industry technical experts, professor-level senior engineer wu shanan that the current level of particulate matter is more mature, the basic can reach 10mg / nm3 the following, but the nitrogen oxides, sulfur dioxide emissions control, has not been obvious effect, to achieve ultra clean emissions requirements are more difficult in terms of technology and cost.
the limitations of the implementation of ultra clean emissions
1, the promotion of environmental costs, squeeze corporate profit margins
first of all, the cement production process needs to consume a lot of coal, inevitably produce a lot of sulfur dioxide and nitrogen oxides. cement industry in recent years has been advocating desulfurization and denitrification, but the practice has been the process of environmental data fraud, environmental protection equipment and so on the problem, one of the important reason behind it is that the current market competition pressure, environmental management increased business costs the
to the current industry widely used sncr denitrification, for example, the price per ton of synthetic ammonia is about 3,000 yuan, usually the case will increase the cost of clinker production of about 6 yuan, the production line technology and management more backward, resulting in more pollutants, the higher the cost of governance. for some of the old production line, the cost of the increase greatly squeeze the profit margins of enterprises, resulting in enterprises in the market competition at a disadvantage.
in addition, the ammonia transport process is also very particular about: to ensure that the container does not leak, do not collapse, do not fall, no damage. transport vehicles should be equipped with leakage emergency treatment equipment; prohibited with acids, metal powder, edible chemicals mixed transport; transport should be anti-exposure, rain, high temperature. road transport according to the provisions of the route, not in residential areas and densely populated areas; rail transport, the drum can be used to transport the car. the packaging should be complete and the load should be safe.
so the cost of transport process is part of the business needs to be considered. because of this, the rise in environmental management costs to a large extent to combat the enthusiasm of the enterprise pollution control, but also in the cement industry to implement ultra-clean emissions of a major problem.
2, the cement industry, the lack of clean emissions of the feasibility of the technical program
wu shangan pointed out that the current cement industry in reducing particulate emissions technology has been very mature, corporate emissions can be maintained at 10mg / nm3 below, but the sulfur dioxide and nitrogen oxides emissions there are still some problems.
at present, there are many ways to reduce nitrogen oxide emissions, including low nitrogen combustion, burner remodeling, hot carbon reduction and sncr, snr denitrification and so on. sncr denitrification technology is about 25% -40%, the project cost is low, the running cost is medium; and scr technology denitrification rate is 80% -90%, but the project cost is higher and the running cost is medium.
project cost is moderate, but there is a certain lack of technology, and technology is more mature cost is generally high, not all enterprises can afford. as a result, ultra clean emissions can not be fully implemented and popularized in the context of a lack of a costly and viable technical solution.
3, the lack of government policy support
coal and electricity industry is the earliest implementation of ultra-clean emissions industry, as early as december 2015 by the national development and reform commission, ministry of environmental protection and the national energy board jointly issued "on the implementation of coal-fired power plant ultra-low emission pricing policy related issues of the notice "in the clear to meet the ultra-low emission standards of coal-fired power plants, january 1, 2016 has been running before the grid of active units, the purchase of electricity tariffs per kilowatt-hour 1 minute (tax); january 1, 2016 after the grid to run the new unit, the purchase of electricity on its purchase price per kilowatt-hour 0.5 cents (including tax).
however, for the cement industry's ultra-clean emissions, the government did not give policy support. when starting from environmental issues, increase the enterprise's environmental protection investment, reduce profit margins. enterprises will be a lack of positive initiative, while the development of ultra-clean emissions will be blocked. in addition, because there is no policy support, some actively engaged in environmental protection of cement enterprises but in the market to reduce their competitive advantage, is not conducive to enterprises to increase investment in environmental protection.
what are the effects of clean emissions on the industry in the cement industry?
whether the cement industry should be ultra-clean emissions controversy has a long time, then the ultra clean emissions in the cement industry and the possible impact of the implementation of it?
1, the implementation of ultra-clean emissions will have a certain impact on the quality of cement
wu shan that the cement industry itself is a low-profit industry, if we must increase the cost of environmental protection, for the nitrogen oxides, sulfur dioxide are down, the profits will be very few. especially in the current domestic cement production capacity, market competition pressure increasing background, cost control for cement enterprises has become increasingly important.
therefore, in the case of a substantial increase in environmental indicators, some enterprises to meet environmental standards, increase environmental protection investment, may be cut in the cement production cut, affecting the quality of cement, more harm than good.
2, increase unnecessary costs and waste of resources
wu shangong said that the cement industry as long as the discharge of dust particles to do a good job, is a major contribution to environmental protection.
for example, the power industry desulfurization and denitrification, wet dust, which is not to solve environmental problems, seems to have become a solution to electricity problems. in the power generation process, the invisible increase of nitrogen oxides and sulfur dioxide emissions, the formation of a bad cycle, increase costs, resulting in waste of resources.
3, some small businesses due to cost pressures, had to shut down
as mentioned above, the cement industry is a low-profit industry. in recent years, environmental law enforcement increasingly stringent with environmental data online monitoring makes cement enterprises more and more illegal environmental costs, forcing cement enterprises to increase environmental governance. in this context, the competition in the cement industry is also environmentally friendly competition, some small businesses due to financial and cost pressures, can not continue to operate, had to shut down.
overall, the cement industry to implement ultra-clean emissions are also advantages and disadvantages. benefit is to reduce the total amount of pollutants in the industry to accelerate the elimination of backward production capacity; the drawback is the increase in environmental management costs, increase the burden on enterprises. in addition, the implementation of the lack of mature technology and policy support in the case of more difficult.
article source: http://www.ccement.com/
