Description
Coal slurry dryer source and present situation
Coal slurry belong to coal production in the process of
belonging, all coal production process will more or less
produced coal slime, according to the different mechanism,its use
value is also different . But as the coal slurry pile up quantity
of continuous increase, to the whole society and coal production
industry to the baggage, and at the same time, along with the coal
resource is nervous, was born coal slurry drying this emerging
industry. At present, China's annual coal slurry emissions by about
******0 million tons, the utilization rate is not more than *0%, if
we can dry these piles of coal slurry and produce industrial or
civil version coal, the coal slurry in situ digest, can not only to
a certain extent, alleviate our country increasingly nervous
supplies of coal, and at the same time, reduce the pollution of the
environment of mining area, but also can bring huge economic
benefit and good social benefits. Along with the global energy
resources lack, coal as nonrenewable resources has been paid great
attention to by governments. Along with the coal carbon industry
mechanization process carry speeding up, as a by-product of coal
and mining industry of coal slurry due to high moisture, high
viscosity, high water binding capacity and low calorific value, and
many other adverse condition, it is difficult to realize industrial
application, long-term be power users close the door on, with civil
to pin as the main way. Since the reform and opening up, the
national economy has been rapid development, the coal production
already to become the first in the world, market situation also has
changed greatly. Coal processing depth and breadth in rapid
development, the output of coal slime obviously rise, how to
improve the added value of coal, the comprehensive utilization of
coal has become the urgent need to study the problem. Arises at the
historic moment of the coal slurry drying industry has been rapid
development. Investment coal slurry drying industry has great
economic benefit and have good social benefits, not only protect
the environment for economic benefits and response national energy
conservation and emission reduction policy. In the current global
financial crisis under the influence, the industry downturn back,
investing coal slurry drying industry is your steady and new
investment choice.
The system structure and working principle
Structure: because of the coal slime water content are bigger,
generally over *0%, has the high caking property and high humidity
characteristics. Materials and humidity drying generally USES drum
horizontal dryer, cylinder diameter is not big, but length is more
general drying equipment is long, so the material being dry time
can be greatly extended, moisture is sufficient to drop down. Coal
slurry drying system consists of four major part, respectively is
heat source part, feed part, drying cylinder body parts,
discharging part.
Working principle: heat source part can use chamber coal
burning, also can be power plant or other industrial department out
high temperature exhaust gas. Feed in part by the coal slurry
scatter equipment and transportation equipment composition,
responsible for coal slurry delivery to drying cylinder inside.
Drying cylinder in part by the barrel and transmission devices, is
the core component of coal slurry drying equipment. Discharge
partly by the feeder and conveying equipment composition,
responsible for after drying slurry delivery to site pile up.
Coal slurry dryer characteristics
1, the downstream dry way, flue gas and material by the same
direction into the coal slurry drying equipment, can use high
temperature flue gas get high evaporation intensity, dryer outlet
temperature is low, high thermal efficiency,
2, dryer resistance to overload ability, large in capacity,
fuel consumption, dry low cost;
3, according to different material property change operation
parameters, make the material in the dryer cylinder body can form
stable all broken fabric curtain, quality heat exchange more
fully;
4, coal slurry dryer system adopts the new type of feed and
discharge device, to eliminate the common drying machine brought
about by the feed discontinuous, uneven, the phenomenon such as jam
and reduce the dust removal system load;
5, new internal structure, strengthen the already scattered
material cleaning and heat conduction function, eliminates the
cylinder body of wall with sticky phenomenon, to material moisture,
viscous adaptability stronger;
6, the system realized the "zero level thrust", greatly
reducing the stop supporting roller wear, barrel stable running and
reliable;
7, dryer use "self-aligning type jockey pulley device", make
supporting roller and roller ring with a linear contact forever,
which greatly reduces the wear and power loss;
8, can according to customer request control product grain
size and water content, dry coal slime water when products can be
lower than 8%, the particle size can be controlled in the following
8 mm.
