Method for harmlessly treating trash flying ash by adopting trash-burning process

[0034] Example 1, the weight of the core material is 1 kg, which includes 78.% of garbage fly ash, 20% of coal powder, 2% of special adhesive (which is composed of 50% syrup; 20% glutinous rice flour; 20% humic acid and borax 10% composition), the core is made by disc granulation technology with a diameter of 5mm. The raw material of the spherical shell is 2 kilograms, using 98% garbage slag and 2% bentonite. The spherical shell is formed outside the core by the disc granulation technology, and the diameter of the ball is 10mm.

[0035] The incineration test is carried out in the test furnace; the test atmosphere is an oxidizing atmosphere, liquefied gas is used as fuel, and the green pellets are burned in the furnace. The whole process simulates the waste incineration thermal system, the temperature is 850-1000℃, and the time is 2 hours. Take out the product and carry out various tests, and the relevant control index detected is: Dioxin <1ngTEQ/Nm 3 , Hexavalent chromium<5mg/L, and other heavy metals -Hg<0.1mg/L, Cd<1mg/L, Pb<5mg/L, all meet the national environmental protection requirements and achieve the purpose of detoxification treatment.

[0036] Example 2:

[0037] Treatment of garbage fly ash: moisture content less than 4%, particle size -200 mesh

[0038] Taking the total amount of core raw materials as 1 ton, take 0.78 tons of garbage fly ash, 0.2 tons of coal powder and coke powder (the two can be in any ratio), and 0.02 tons of special adhesive (including 60% syrup; glutinous rice flour) 15%; Humic acid 17%; Borax 8%). After being mixed by a mixer, it enters the disc granulator to produce a 6mm diameter core, and the semi-finished product after passing through a vibrating screen is sent to the secondary pelletizing disc with a belt conveyor, and at the same time, 1.96 tons of garbage slag and 0.04 tons of bentonite are uniformly distributed. The mixture is sent to the secondary pelletizing disc for shell formation. The spherical shell has a diameter of 13mm. After the green pellets are formed, they enter the sealed special transport truck and send them to the garbage incinerator. The charge is sent into the furnace according to the proportion and taken out after incineration. Sample, tested: the relevant control index dioxin <1ng TEQ/Nm 3 , Hexavalent chromium <5mg/L, and other heavy metals -Hg<0.1mg/L, Cd<1mg/L, Pb<5mg/L all meet the national environmental protection requirements and achieve the purpose of detoxification treatment.

[0039] Example 3:

[0040] Treatment of garbage fly ash: moisture content less than 4%, particle size -200 mesh

[0041] Taking the total ball core raw material as 10 tons, take 6.9 tons of garbage fly ash, 3 tons of coke powder or coal powder (-200 mesh), and 0.1 tons of humic acid. After being mixed by a mixer, it enters the disc granulator to make The semi-finished product with a diameter of 8mm after passing through the vibrating screen is sent to the secondary pelletizing disc with a belt conveyor. At the same time, 19.6 tons of garbage slag and 0.4 tons of humic acid are uniformly mixed and sent to the secondary pelletizing disk for shelling. , The diameter of the spherical shell is 16mm. After the green ball is formed, it enters the sealed special transport vehicle and sends it to the garbage incinerator. The charge inlet is sent into the furnace according to the proportion; after the incineration, the sample is taken out and tested: the relevant control index (dioxin < 1ng TEQ/Nm 3 , Hexavalent chromium <5mg/L, and other heavy metals -Hg<0.1mg/L, Cd<1mg/L, Pb<5mg/L) all meet the national environmental protection requirements and achieve the purpose of detoxification treatment.