Dust Removal and Desulfurization Project of 2×1,000 MW Ultra-Supercritical Coal-Fired Power Plant in Shenhua Jiujiang Power Plant, Jiangxi Province, China

1. Profile

(1) Project site:

Eastern Suburb of Jiujiang City, Jiangxi Province.

(2) Owner:

Shenhua Jiujiang Power Plant in Jiangxi Province.

(3) Capacity:

Flue gas cleaning of 2×1,000 MW ultra-supercritical coal-fired power plant

(4) Date of operation:

July 2018.

(5) Investment, construction and operation:

It was invested and operated by the Owner, and planned and designed by SWEPDI of China Power Engineering Consulting Group Corporation. The electrostatic precipitator, wet electrostatic precipitator and wet desulfurization system are designed, purchased and built by Fujian Longking Co., Ltd.

2. Major environmental problems to be addressed

Emission control of particulate matter and SO₂ in flue gas from the coal-fired power plant.

3. Environmental standards and/or main index limits to be followed

According to the ultra-low emission limit of the coal-fired power plant, the particulate matter emission concentration shall be＜5 mg/m³, and SO₂ emission concentration shall be＜35mg/m³.

4. Technological process

Flue gas→SCR denitration→low-low temperature electric precipitation→limestone-gypsum wet desulfurization→wet electrostatic dust removal→chimney. The electrostatic precipitator is supplied by a high frequency power.

5. Environmental pollution control effects

Particulate matter emission concentration was＜5 mg/m³, and SO₂ emission concentration was＜35 mg/m³.

6. Investment and operation cost:

The investment in dust removal and desulfurization system was about RMB 350 million.

Case highlights: The successful application of ultra-low emission technology in high-parameter and large-capacity units of typical coal-fired power plants led to major environmental index better than the ultra-low emission limit and has the first-class performance level among the units of the same type, thus achieving the perfect combination of high efficiency and low emission.