What is the smoke emission standard of power plants?

Taking the Emission Standard of Air Pollutants for Thermal Power Plants issued by Tianjin as an example, the emission concentrations of standard particulate matter, sulfur dioxide and nitrogen oxides in the flue gas of power plants can reach below 10 mg/m3, 35 mg/m3 and 50 mg/m3.

There are two main considerations in issuing and implementing the Emission Standard for Air Pollutants from Thermal Power Plants:

First, in June of 20 16, all public coal-fired power units in our city, and in June of 10/7, all coal-fired power units in our city were self-provided, and in June of 17, there were 45 units, all of which have completed ultra-low emission transformation. Monitoring data show that particulate matter, sulfur dioxide and nitrogen oxides.

The emission standards of particulate matter, sulfur dioxide and nitrogen oxides in coal-fired power plants are 20 mg/m3, 50 mg/m3 and 100mg/m3, respectively, which can no longer meet the requirements of air pollution control in thermal power plants in our city. In addition, according to the analysis of local emission sources of PM2.5 in Tianjin on 20 17, the contribution rate of coal-fired power plants is 8.0%.

Secondly, wet desulfurization flue gas contains a large number of condensable particles, mainly including sulfuric acid mist and soluble salts, which are discharged into the atmosphere with the flue gas and condensed into fine particles after cooling. Reducing the exhaust temperature of flue gas has obvious effect on removing condensable particles in flue gas. Therefore, it is necessary to put forward clear requirements for flue gas emission temperature.

Extended data:

According to the calculation, after the implementation of Emission Standard of Air Pollutants for Thermal Power Plants, the condensable particulate matter discharged with water vapor in flue gas can be reduced by about10.08 million tons per year through advanced treatment of condensation and dehydration, and the average annual concentration of PM2.5 can be reduced by about 2 μ g/m3 under general meteorological conditions. By lowering the exhaust temperature, about 8 million tons of condensed water can be recovered every year.

If all of them are used for desulfurization and water replenishment, it is estimated that the annual cost can be saved by 63.2 million yuan according to the calculation of 7.9 yuan/ton of industrial water. In particular, the new project will be implemented from the date of publication of the standard; The existing coal-fired power generation boilers have implemented corresponding emission concentration limits since July, 1965 1, and the existing coal-fired power generation boilers and coal-fired non-power generation boilers over 65t/h have implemented flue gas emission temperature control requirements since July, 2009 1 1.

The existing oil-fired boilers, gas-fired boilers, gas turbine units and coal-fired non-power generation boilers with a capacity of more than 65t/h shall implement corresponding emission concentration limits from 20 1 July 91day.

Tianjin government network-Tianjin thermal power plant air pollutant emission standard implemented in July 1.

National Energy Administration-Tianjin issued and implemented the local standards for air pollutant emission from thermal power plants for the first time.