[SCR denitration technology] treatment of nitrogen oxides in tail gas of kitchen waste power plant

Release time:

2022-08-09

The grvnes technical team of GRVNES environmental protection ensures that the NOx and NH3 treatment efficiency in SCR and ASC systems meet the stringent global emission standards through matching practices with many global engines, and the NOx treatment efficiency is up to more than 98%. Meanwhile, it is jenbacher Mannheim mwm Carter cat mtu. Cummins Perkins Volvo, coker g00gol and other engines. According to the successful experience in the treatment of PM, Co, NOx and other pollutants in the engine tail of different fuels and different application scenarios.

A minute ago, it was a delicacy. A minute later, it became kitchen garbage. Kitchen waste includes leftover food, oil soup, rotten vegetable leaves, peels, discarded rotten food, expired food, etc. Due to improper disposal and distribution, food waste has become a potential danger source for global food safety and ecological safety., How to deal with kitchen waste is a headache. In the existing landfills, all kinds of odors mainly come from kitchen waste. In China, where waste classification has not yet been fully implemented, the proportion of kitchen waste in people's domestic waste is very large, and it is mixed with other wastes, which increases the difficulty of waste treatment. Especially in the summer every year, the odor around the waste disposal site and landfill site is so bad that the residents nearby complain. The source of odor is mainly kitchen waste rich in various organic substances.

In practice, landfill is the main method to treat kitchen waste in various countries. However, this treatment method has a great negative impact on the environment, which not only destroys the vegetation and air on the surface, but also pollutes the soil and water sources near the garbage dump, because the soup water in the kitchen waste will penetrate into the soil and gradually into the nearby water sources, or enter the nearby water sources with the rainwater. Kitchen waste also contains a large number of microorganisms, which has become a breeding ground for bacteria, viruses, pests and so on.

Food waste is sorted and purified by large incoming materials, and impurities in the food are screened out. According to different types of food waste, the treatment methods are also different. Those that are passively incinerated off-site, used to convert thermal power and electric energy for power generation, and those that are transported off-site for incineration. Kitchen waste can be fermented to produce biogas, which can be used for power generation after purification. Except for the self use part of the eastern treatment plant, the rest is transmitted to the power grid for the use of thousands of households.

SCR selective catalytic reduction technology is a mature technology for the treatment of ammonia oxide NOx in the tail gas of biogas generating units. Selective catalytic reduction (SCR) is used to control NOx in the tail gas of biogas generating units. NH3 or urea (usually urea aqueous solution with mass ratio of 32.5%) is used as reducing substance. Under the condition that O2 concentration is more than two orders of magnitude higher than NOx concentration, under the action of certain temperature and catalyst, NH3 is used to reduce NOx to N2 and H2O. Since NH3 selectively preferentially reduces NOx without reacting with 02 first, Therefore, it is called "selective catalytic reduction".

Tail gas treatment of biogas generator in Shenzhen landfill

Project drawing of SCR denitration system for Henan kitchen waste generator

Denitration project of biogas generator in Tianjin Zhonglan landfill site

Nitrogen oxide treatment project of generator unit of Chongqing Zhonglan landfill site

Diagram of Hunan Xiangtan landfill site generator unit denitration project

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