Integrated Briquette Carbonization-Activation Line for Columnar Activated Carbon, Water Purification Client

Background

A water-purification materials producer planned a new 2000 t/a integrated line for columnar activated carbon. Using low-ash coal fines, the line must deliver pellet strength >=95%, iodine value 900-1050 mg/g and uniform 4 mm particle size, with continuous carbonization, activation, screening and packaging and compliant emissions.

Specifications

Item	Value
Capacity	2000 t/a
Raw material	Low-ash coal fines (briquette)
Particle size	4 mm nominal
Pellet strength	>=95%
Iodine value	900-1050 mg/g
Main equipment	Briquetting press + carbonizer + rotary activation furnace
Activation temperature	850-1000 C
Emission control	Off-gas combustion + heat recovery + dedusting/desulfurization

Solution

Delivered a briquette forming, carbonization, rotary activation, screening and packaging line. Coal fines are mixed, kneaded and pressed into briquettes; volatiles are removed in the carbonizer; the rotary activation furnace activates with steam and CO2 under zone temperature control. The shell uses high-alumina castable plus lightweight insulation, with heat recovery to cut overall energy use. Inline metering and dust collection are included; off-gas is treated by combustion plus desulfurization plus bag dedusting to meet emission limits.

Milestones: equipment fabrication and civil work in parallel (months 1-2), installation (month 3), single-machine test (month 4), drying and commissioning (months 5-6), acceptance (month 7).

Results

Indicator	Target	Actual
Capacity	2000 t/a	Achieved
Pellet strength	>=95%	96-97%
Iodine value	900-1050 mg/g	930-1010 mg/g
Product yield	>=85%	87%
Unit energy	-	About 12% lower than stepwise line

Customer feedback: stable briquette strength, adsorption meets water-treatment requirements, high continuity, dust and flue gas well controlled.