VietNamNet Bridge - Making unburned bricks from ash appears to be the best solution for the ash discharged by thermal power plants.

The Duyen Hai Thermopower Company in Tra Vinh province has signed a contract on selling the ash  produced during the electricity generation at Duyen Hai 1 plant to the Viet Long – Hoang Quy Joint Venture. The ash will be used to make additives to be provided to cement grinding stations.

Duyen Hai is also considering selling ash to Nguyen Trinh, another enterprise in Tra Vinh province, to make unburned bricks.

According to Nguyen Huu Phien, director of Duyen Hai Company, the operational Duyen Hai 1 Plant consumes 3 million tons of 6a dust coal a year and churns out 1 million tons of ash.

Under the contracts signed with Viet Long – Hoang Quy, the electricity generator sells ash to the cement additive maker, about 1 million tons per annum, at the price of VND23,000 per ton. In the first years, the volume of ash to be consumed is about 400,000 tons a year.

Making unburned bricks from ash appears to be the best solution for the ash discharged by thermal power plants.

Besides, Duyen Hai now provides 1,000 tons of ash to Holcim, a large cement company, which uses ash to make clinker, a material for cement manufacturing.

Duyen Hai 1 Plant has two electricity generation units, each of which has the capacity of 622.5 MW and can provide 6 billion kwh of electricity to the national grid every year.

Duyen Hai Company is building Duyen Hai 3 Plant which has the same capacity as Duyen Hai 1. It is expected that the first electricity generation unit of Duyen Hai 3 would get completed by the end of 2016, while the second unit by 2017.

The Duyen Hai Electricity Center now manages four thermal power plants, namely Duyen Hai 1, Duyen Hai 2, Duyen Hai 3 and expanded Duyen Hai 3. 

A large land plot covering an area of 100 hectare has been reserved for ash ground. 

The volume of ash to be discharged from thermopower plants using domestic dust coal is estimated to account for 35 percent of coal volume.

Nguyen Van Tam, deputy director of the Tra Vinh provincial Construction Department, said the local authorities have called on unburned material building manufacturers to use thermopower ash as the input material to make unburned bricks.

Three investors have shown their wish to make unburned building materials from thermopower ash. It is estimated that the province would need 230 million unburned bricks by 2020.

Tra Vinh is one of the provinces with the highest number of thermopower plants in the country.

Tthe government in 2015 released a decision which said investors must show solutions to settle the ash before starting building thermopower plants.


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