Not always and to be more accurate, most often, feedstock with a moisture content close to the natural one, which is above 55 % is used for charring. Our basic model of ModEсo 4-60 charcoal burning kiln is included into the product line, but it is inefficient when the relative moisture content of the feedstock exceeds 25 %. That is why, Synergy Dream has designed a wood pre-drying complex. So a new model of charcoal burning kiln appeared — ModEсo 4-60 PS, which is described below.
The main parts of the kiln are a hearth and two pyrolysis sections accommodating two stationary retorts each.
The hearth is a metal enclosure, which walls and bottom are lined with high temperature insulant. The following materials are used for lining: ceramic fibre with an operating temperature of up to 1,250 0C, ceramic plates with an operating temperature of up to 1,250 0C, and firebrick ShA 5.
Pyrolysis sections also represent metal enclosures, with retorts installed inside (retort is a vessel where thermal decomposition of wood occurs). Retorts are made of steel 09 G2S, 12 mm thick. Pyrolysis section walls, where the operating temperature reaches 600 0C are lined with ceramic fibre with an operating temperature of up to 1,050 0C.
The pre-drying complex is composed of four individual drying sections powered by the used heat transfer medium. Removable drying baskets provide the feedstock movement from a sawing-splitting area to the drying area, with further feedstock movement to the retort charge area. The pre-drying complex decreases the moisture content of the feedstock by 30–40 %.
The ModEсo 4-60 PS charcoal kiln is operated only with the ACS (automated control system). The ACS monitors operating modes of the kiln and maintains temperatures within set ranges. The ACS also monitors temperature modes in drying sections and controls them.
|Item No.||Parameters||Unit ofmeas.||Value|
|1||Area occupied by ModEсo 4-60 PS kiln||m2||282|
|2||Overall dimensions of the main section of ModEсo 4-60 PS kiln, no less than:|
– length / length, incl. transporter
– height (depends on the climate in the kiln operation area)
|3||Weight of delivery set, no more than||t||50|
|4||Weight of each transport section, no more than||t||9,3|
|5||Power supply voltage, current frequency||V; Hz||220; 50|
|6||Power consumed by ModEсo 4-60 PS kiln||kW/h||4,5|
|7||Feedstock (firewood) flow rate, L=300–350 mm||m3/day||14-18|
|8||Расход дров для поддержки процессов*||m3day||0,2-1|
|9||Charcoal capacity at firewood moisture content of up to 25 %**||kg/day||1800-2350|
|11||Time for preparation to start||hour||2|
|12||Time for preparation for truck transportation||hour||48|
|14||Cycle duration of one retort**||hour||16-20|
|15||Time of coal cooling in quenchers||hour||24-48|
|16||Operating range of temperatures|
|17||Max allowable temperature|
* – the parameter value depends on the season, and feedstock moisture content.
** – the parameter value depends on the moisture content, rock and feedstock size.
*** – the parameter value depends on the quantity of units at the same site:
1 units — 2 persons per shift
2 units — 2 persons per shift
3 units — 3 persons per shift