Vertical Naturally Circulating Fluidized Bed Boiler For Power
Station Or Industry
Introduction of CFB Boiler
The ring fluidized bed boiler USES the most industrialized clean
coal combustion technology. Circulating fluidized bed boiler USES
fluidized combustion, the main structure includes combustion
chamber (including dense phase area and dilute phase area) and
circulating furnace (including high temperature gas-solid separator
and return material system) two major parts. With bubbling
fluidized bed combustion technology is one of the biggest
difference between high running speed, strengthened the combustion
and desulfurization heterogeneous reaction process, such as boiler
capacity can be expanded to power industry can accept large
capacity (600 mw or above level), circulating fluidized bed boiler
has been very good to solve the basic problem such as
thermodynamics, mechanics, materials science and engineering
problems such as inflation, wear and overtemperature, become
difficult to burning solid fuels (such as coal gangue, shale,
municipal waste, sludge and other wastes) energy utilization of
Features of CFB Boiler
(1)Install fuel economizer
Molecular structure of hydrocarbons by the fuel economizer
processing, change, increase the distance between the molecules,
the increase in the number of small molecular fuel viscosity
decreased, the result of the fuel oil before burning atomization,
refined, to improve greatly, spray into the combustion chamber
internal are fully under the condition of low oxygen combustion,
thus the blast volume of combustion equipment can reduce 15% to
20%, avoid to take away the heat in the flue, flue temperature drop
5 ℃ to 10 ℃.
The fuel oil of the combustion equipment is treated by the
energy-saving device, which can save 4.87% to 6.10% due to the
improved combustion efficiency.
Thoroughly remove coke from the burn tip and prevent recoke.
Remove the accumulation of residuum in the furnace wall due to
insufficient combustion of fuel to achieve the effect of
environmental protection and energy saving.
The air pollution caused by the exhaust gas from combustion
equipment is greatly reduced. The harmful components in the exhaust
gas, such as carbon monoxide (CO), nitrogen oxide (NOx) and
hydrocarbon (HC), are greatly reduced, and the exhaust gas is
reduced by more than 50%.
At the same time, the dust content in the exhaust gas can be
reduced by 30-40%.
Installation position: installed between oil pump and combustion
chamber or nozzle, the ambient temperature should not exceed 360℃.
(2)Install condensing gas boiler energy-saving
Gas boiler exhaust smoke contains up to 18% steam, it contains a
lot of latent heat is not used, smoke exhaust temperature is high,
sensible heat loss is large.
The combustion of natural gas still emits nitrogen oxides, a small
amount of sulfur dioxide and other pollutants.
Reduce fuel consumption is the best way to reduce costs, condensing
type gas boiler economizer can be installed directly in the
existing boiler flue, recycling of the high temperature flue gas
energy, reduce fuel consumption, economic benefit is very obvious,
at the same time, the condensation of water vapor absorption
nitrogen oxide in flue gas, sulphur dioxide and other pollutants,
reduce the pollutant emissions, has the important significance of
(3)The use of condensing waste heat recovery boiler technology
In the traditional boiler, the smoke exhaust temperature is
generally 160 ~ 250℃, the steam in the flue gas is still in the
state of overheating, it is impossible to condense into liquid
water and release the latent heat of vaporization.
As we all know, boiler thermal efficiency is calculated by low
calorific value of fuel without considering heat loss of latent
heat of vaporization in high calorific value of fuel.
Therefore, the thermal efficiency of traditional boilers can only
reach 87% ~ 91%.
And condensing waste heat recovery boiler, it reduces the smoke
exhaust temperature to 50 ~ 70℃, fully recovered the sensible heat
in flue gas and water vapor condensation latent heat, improve the
Condensed water can also be recycled.
(4)The tail of the boiler adopts heat pipe waste heat recovery
Waste heat is the energy that has not been used in energy
utilization equipment under certain economic and technological
conditions, that is, redundant and waste energy.
It includes waste heat of high temperature waste gas, waste heat of
cooling medium, waste heat of waste gas and waste water, waste heat
of high temperature products and slag, waste heat of chemical
reaction, waste heat of combustible waste gas and waste water, and
residual pressure of high pressure fluid.
According to the survey, the total waste heat resources of various
industries account for about 17%~67% of the total fuel consumption,
and the recoverable waste heat resources account for about 58% of
the total waste heat resources.
Specifications of CFB Boiler
|Feed water temperature|