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How to install desulfurization and denitration equipment but fail to achieve the treatment effect?

2022-05-05 15:08:31

Nowadays, environmental protection requirements are becoming more and more strict, and there are inspection teams on-site every once in a while. Of course, we know that up to standard emission is very important. But it's not easy to install desulfurization and denitration equipment. After running for a period of time, I find that it can't achieve the governance effect I want. As far as I know, it's not just our company that has a headache. Similar problems are not uncommon in the industry. What should I do next? This is what the ultra-low emission equipment manufacturer learned from a person in charge of a coking enterprise.

When money is spent and things are done, the governance technology bought may not be really suitable for you - the reporter further learned that this situation is not a case in coking, steel, coal chemical and other enterprises. With the continuous tightening of air pollution control requirements, the above "large coal users" have become the focus of current control. The upgrading and transformation work comes one after another. How to break through the technical bottleneck?

In the field of flue gas treatment, desulfurization and denitration technology is not a new thing. More than 10 years ago, China's power industry took the lead in carrying out relevant exploration. According to the 2017 development report of desulfurization and denitration industry (hereinafter referred to as the report) issued by the desulfurization and denitration Committee of China Environmental Protection Industry Association, by the end of last year, 71% of China's coal-fired units had completed ultra-low emission transformation, especially the control of major emissions such as sulfur dioxide and nitrogen oxides, which basically reached the international advanced level. It is on the basis that the space of electric power emission reduction is approaching saturation that the non electric field has attracted more and more attention.


Taking 2017 as an example, according to the statistics of the report, among the 3.82 billion tons of commercial coal consumption in China, the power industry accounts for about 49%, and the non power industries such as coking, steel and chemical industry account for 50%, becoming the field with large coal consumption. The resulting emissions of sulfur dioxide, nitrogen oxides and other pollutants are still at the level of ten million tons, far exceeding the environmental capacity. In order to meet the requirements of air quality, the non electric industry needs to reduce emissions by at least 50%.

This situation has also attracted the attention of the competent authorities. "Compared with coal-fired power, the non electric industry contributes more and more to China's pollution emission. China's steel output accounts for 50% of the world, cement accounts for 60%, electrolytic aluminum accounts for 65%, and more than 400000 large-scale coal-fired boilers are distributed." Liu Bingjiang, director of the atmospheric Department of the Ministry of ecological environment, said that although the amount of coal used is amazing and the emissions of sulfur dioxide, nitrogen oxides, smoke and dust account for more than three-quarters of the country, there is a large gap in the governance base and management capacity of flue gas in the non electric field, which has been upgraded to a "main spear and shield".

So, what restricts the governance process of non electric industry? The manufacturers of ultra-low emission equipment have learned that, for example, the types of coal and their components are different, so it is first decided that the non electric and power industries cannot be generalized. For example, coal with better quality is mostly used for power generation, and coal with more sulfur and ash content or relatively poor quality is used more in non power industry. This leads to different components of flue gas emitted by the two, and the treatment should be different.

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