Energy-regeneration pollution-free disposal method for waste electrical appliance circuit board
A harmless treatment, circuit board technology, applied in waste treatment, combustion methods, incinerators, etc., to achieve the best environmental benefits, low operating power consumption, and small investment effects
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Embodiment 1
[0082] In this example, a test is carried out on a fluidized bed furnace (designed as a small fluidized bed boiler) (with a heat exchange water pipe network installed inside the furnace) on an industrial trial production line for roasting stone coal to extract vanadium for power generation. The fluidized fluidized furnace is equipped with a main combustion chamber, flue settlement chamber and cyclone dust collector and electric dust collector, the flue gas from the main combustion chamber is drawn into the cyclone dust collector through the flue settling chamber, and then drawn into the electric dust collector through the flue gas pipe for dust removal and then emptied. Before the test, the power generation system of the fluidized fluidized furnace was technically improved: an alkalizing agent metering device, a central furnace inlet air duct, a thermocouple in the lower, middle and upper parts of the furnace, and O 2 Content real-time detector, flue settling chamber heat excha...
Embodiment 2
[0093] The present embodiment is carried out on the fluidized bed boiler power generation industrial test line of the embodiment 1, comprising the following steps:
[0094] 1) Preparation of materials: take waste electrical appliances including circuit boards from a storage yard and use a hammer crusher to crush them into block materials with a particle size of less than 200mm; 10 times water and stir well for later use;
[0095] 2) Alkalinization incineration: Feed block materials and alkalizing agent continuously and evenly into the fluidized bed boiler. The alkalizing agent is quicklime powder and calcium nitrate, and the dosage is equivalent to 5% of the mass of waste electrical circuit boards as raw materials, of which quicklime Powder: Calcium nitrate is mixed evenly at a mass ratio of 9:1; the alkalizing agent is fine grain or powder with a particle size of less than 5mm; the alkalization incineration temperature in the furnace is 1080°C to 1200°C;
[0096] 3) Enrichment...
Embodiment 3
[0101] This example is tested in a new dry-process cement production plant with a cement kiln waste heat power generation system and a fluidized bed furnace for drying. The fluidized bed furnace of the cement plant was originally used to supply hot air for drying raw materials. "Flue + cyclone dust collector", the hot flue gas in the furnace is drawn into the rotary drum dryer through the flue, cyclone dust collector and then through the flue gas pipeline. The waste gas from the waste heat boiler of the waste heat power generation system of the original cement kiln is emptied after being dusted by the bag filter.
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