Waste incineration fly ash curing treatment equipment system structure
Fly ash curing treatment equipment complete set of composition is clear and concise, mainly includes a fly ash silo, screw conveyor, cement silo, weighing machine, fly ash mixing machine, belt conveyor, extruder, pharmaceutical tanks and so on.
Fly ash generated after waste incineration can be cured and stabilized, the volume can be reduced to 2-10% of the original garbage, and has excellent resistance to leaching, wet and dry resistance, resistance to penetration, resistance to freezing, and also has sufficient mechanical strength to meet the requirements of the zonal landfill disposal of the site.
Four kinds of fly ash stabilization (curing) technology process and cost comparative analysis
First, cement curing method
Advantages
1. Low treatment cost, the technical process is quite punitive.
2. The ratio of cement to fly ash can be used to control the strength of the curing body
3. It can be handled directly without pre-treatment
Disadvantages
1. A large amount of cement is used resulting in an increase in the volume of the curing body
2. The special salts in the fly ash can cause curing rupture
II.
Advantages
1. Simple process, low volume increase of stabilized products
2. High stability of the product
Disadvantages
1. Poor stabilization of the heavy metals in the complex state
2. High price of the chemicals
Three, asphalt curing method
Advantages
1. Low permeability of the curing body
2. Good barrier to who
Disadvantages
1. Material needs to be operated at high temperatures, poor safety
2. Higher equipment investment costs and operating costs compared to cement curing
IV, Melt curing method
Advantages
1. Heavy metals is the most effective treatment technology
2. Can get high-quality building materials
Disadvantages
1. High-temperature heat melting needs to consume a lot of energy
2. Device is responsible for the operation requirements High
Waste incineration fly ash stabilization treatment system workflow route?
The incineration plant flue gas treatment system of the fly ash into the storage bin after quantitative delivery to the screw conveyor, and then sent by the screw machine to the chelating mixing device cement silo cement is also quantitatively transported to the cement silo under the screw conveyor, the same by the screw machine sent to the chelating mixing device, according to the design of the ratio of the fly ash and cement in the chelating mixing device mixing, and at the same time chelating agent dilution solution delivery pumps and the water supply system at the same time to start, to the At the same time, the chelating agent diluent delivery pump and water supply system start to supply chelating agent and water to the chelating and mixing device at the same time.
Fly ash, cement, chelating agent and water are mixed in the chelating mixing device, and the heavy metals in the fly ash react with the chelating agent to produce chelating compounds which are stabilized.
The stabilized fly ash and cement slurry coming out of the chelating mixing device passes through the belt conveyor, pallet conveyor, block molding machine, block conveying device, and finally is made into cement bricks which are maintained in the maintenance room.
The water evaporates during the curing process and is then transported away by special brick trucks. The brick trucks are transported to the designated location for landfill, thus completing the entire fly ash stabilization and curing process.
Waste incineration fly ash curing chelating agent ratio standard
Chelating agent ratio of 0.5 ~ 3%. The actual amount to be used according to the composition of the fly ash after the final test to determine; cement ratio of 10% to 20%; design according to 10%.