Gasification Technology For Coal Burner

All of the industries want a pollution-free technology and effective cost for operational.
Tools gasification with chemical-physical reactions separating the components of coal that can not burn and turn coal into fuel gas with high efficiency and clean,
so users will have a clean combustion systems with energy supply system is not expensive, so the operational cost in the company will be more saved.
Gasification technology excellences :
a. Replace the expensive fuel oil or electricity with the cheap coal.
Based on the data usage on client gasification that already using this technology, operating costs can be reduced to 3 to 4 times more efficient.
b. Clean environment
Produce a clean coal combustion and can meet the standards of environmental protection without any dust collector or desulfurisasi units, the density of smoke and dust emissions from the kiln and boiler units is less than 80mg/Nm3, the density of sulfur dioxide emissions of less than 800mg/Nm3.
c. Energy saving and consumption reduction
Several types of clients that have been changed by using the gasification gas, can increase its thermal efficiency of about 15-30% when compared with the use of coal combustion in a direct and more efficient electricity consumption, for about 20-40%. For new boiler is not require a large chimney if they usie coal gasification.
d. easy and safe machines.
With the complete Atmospheric Water Jacket on the reactor body makes operation more easy.
Accordance with the follows factory :

- Plant food

- Plant fertilizer

- Printing can

- Drying of wood

- Melting brass

- Etc.

Quality Improvement Of Asphaltic Concrete Mixture (AC Type) With Variation Of Aggregates

The use of local aggregate is preferable to make the Asphaltic Concrete, AC type, as wearing course for highway pavement.
This is because it is more economical to use the local aggregate as much as possible. Up to now in Barito Selatan, Central Kalimantan,Indonesia.
Aggregates for Hot Mix Asphalt (HMA) have to be imported from Barabai, South Kalimantan, about 200 km distance from Buntok city, from which the aggregate arc considered meeting the required specification.
In the south Barito , however the natural source of local aggregates is actually available; the coarse aggregates arc found in Karau river at Awang village, gravel and sandstone arc found in Barito river and limestone boulder arc available at Sibung village. Unfortunately, these local aggregate arc never tested before for their characteristic performance,
so that local contractors arc still importing their aggregates from Barabai. This investigation is performed to test the characteristic performance of local aggregate of south Barito, included abration test, affinity for asphalt, water absorption and specific gravity of aggregate.
It is found that the local aggregate has met the specification, except abration of the local limestone, which is over than 40%, so that the limestone is not to be used as coarse aggregate.
In this study, the aggregate mixture containing crushed gravel from Awang village, natural gravel and sand from Barito river, added by mineral filler of limestone, can be designed to meet the number V gradation type of SNI 1737 - 1989-F as recommendation.

To improve Asphaltic Concrete (AC type) in quality and cost, the local aggregates are mixed with aggregates from Barabai in six variation and tested with Marshall for heavy traffic requirement (75 blows). The variation mixture of aggregate arc: Variation I for 100% local aggregate mixture, Variation 2 for 100% aggregate mixture from Barabai, Variation 3 for mixture of 75% local sand and gravel + 25% aggregate from Barabai, Variation 4 for mixture of 50% local sand and gravel + 50% aggregate from Barabai, Variation 5 for mixture of 25% local sand and gravel + 75% aggregate from Barabai and Variation 6 for mixture of 0 % local sand and gravel + 100% aggregate from Barabai.
The Marshall Stability values obtained are 800 kg, 960 kg, 1010 kg, 1150 kg, 1500 kg and 2100 kg for Variation 1 to 6, respectively, and they are for optimum asphalt of 5.45 % , 5.15 % , 4.93 % , 5.10 %, 5.23% and 5.30 %, respectively. The production cost per m3 asphaltic mixture arc Rp 1,138,546.00., Rp 1,351,996.00., Rp 1,124,813.00, Rp 1,196,890.00., Rp 1,242,159.00. and Rp 1,337,162.00, for Variation 1 to 6, respectively.
Marshall immersion tests for Variation 4, 5 and 6 produce Retained Stability Index of 77.3%, 87.1%, 77.45%, respectively, which mean the retained strength are exeeding the minimum acceptance of 75 %.
The mixture of Variation 4 is selected to be used in Barito Selatan district because its optimum usage of local aggregate and 11.47% saving cost when compared with Variation 2 that involves only imported aggregate from Barabai. It is also found that the Variation 6 is the best in quality for heavy traffic, yet it is still cheaper than the Variation 2.