Wuhan SY Blue Sky Environmental Technology Engineering Co., Ltd.
Waste Incineration Industry
The composition of waste incineration flue gas is complex, characterized by high humidity, significant temperature fluctuations, and strong corrosiveness. It contains highly toxic organic chlorides and heavy metals, posing severe hazards if directly discharged.
Governance difficulties
Industry Overview
The flue gas from waste incineration has complex compositions, characterized by high humidity, significant temperature fluctuations, and strong corrosiveness, containing highly toxic organic chlorides and heavy metals, posing severe hazards if directly emitted.
Governance difficulties
Challenges in Flue Gas Treatment for Waste Incinerators
Diverse and highly hazardous pollutants
Containing highly toxic organic chlorides and heavy metals, with strong bioaccumulation.
High humidity and high dew point
The moisture content can reach up to 60%, with a dew point of 130-140 ℃, making it prone to condensation and corrosion.
Large temperature fluctuations
The temperature fluctuation range at the outlet of the waste heat boiler is large, and it is necessary to strictly control the dioxin polymerization zone.
Smoke and dust are prone to adhere
The deacidification product has strong hygroscopicity and is prone to clogging pipelines and dust collectors.
Highly corrosive
The combination of acidic gases and high humidity can corrode equipment and shorten its lifespan.
Process Route and Technical Description
The wet scrubber is located upstream of the SCR; the process flow is as follows:
Route One
SNCR+SDA+activated carbon injection+SDS+FF+GGH1+FGD+SGH2+SCR inside the furnace
The wet scrubber is installed before the SCR, with the following process flow:
02
The 200 ℃ flue gas is cooled to 160 ℃ by a semi dry acid removal tower, and then bag dust is removed to 150 ℃, simultaneously removing smoke, heavy metals, dioxins, and most HCl and SO3.
02
1 # GGH is cooled to 100 ℃ and enters the wet process tower for deep deacidification until the flue gas temperature reaches 65 ℃.
02
After multi-stage heating to 180 ℃, it enters SCR to remove NO ₓ, and finally heats up to above 150 ℃ for emission.
02
Advantages: Adequate waste heat recovery, low usage of SCR catalyst, long lifespan, and virtually no white smoke throughout the year; Disadvantages: Complex system and large footprint.
Route Two
SNCR+semi dry process+activated carbon injection+dry process+bag dust removal+SGH1+SCR+GHG+wet process tower+SGH2 inside the furnace
The equipment has low resistance and low power consumption during operation.
02
After desulfurization and dust removal at 150 ℃, the flue gas is heated to 180 ℃ by SGH, and the SCR reactor catalyzes the removal of NO ₓ
02
GGH is cooled to 115 ℃ and further deacidification is carried out in the wet tower, reducing the flue gas temperature to 65 ℃.
02
GGH is heated to 130 ℃ for emission, and there is no need for whitening in spring and autumn; In winter, the secondary SGH is heated to 150 ℃ to achieve no white smoke.
Route Three
SNCR+SDA+activated carbon injection+SDS+FF+SGH1+SCR+GGH inside the furnace
02
After deacidification and dust removal at 150 ℃, it is heated to 185 ℃ by SGH and catalyzed by SCR to remove NO ₓ and dioxins.
02
Export waste heat recovery for cooling, and ensure stable exhaust temperature above 150 ℃.
02
Flexible selection of waste heat recovery devices to meet different project requirements
Contact us immediately to learn more about the plan details
Governance difficulties
Technological Innovation Points
Two stage denitrification
Triple desulfurization
Precise temperature control
Collaborative purification
Related Core Products
Application Cases
Real case studies of service
From the perspectives of technical capabilities and operational costs, compare the advantages of traditional solutions.
The SCR catalyst has high efficiency, with a denitrification efficiency of over 95%; After optimizing the process route, the system's power consumption is 10% -15% lower than the industry average level
Project Case
3x600t/d Garbage Incineration Project
4x750t/d Garbage Incineration Project
2x500t/d Garbage Incineration Project
2x750t/d Garbage Incineration Project
2x800t/d Garbage Incineration Project
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