Complaint
1. Feeding system
2. Ash and slag conveying system
3. Rotary kiln
4. The second combustion chamber
5. SNCR systems are out of stock
6. Waste heat boiler
7. Quench semi-dry deacidizing tower
8. Dry powder deacidification adsorption spray device
9. Bag filter
10. Ventilation and smoke exhaust system
11. The SCR system
12. Wet acid
13. Flue gas reheat system
14. Auxiliary wind system
15. Auxiliary combustion system
16. Compressed air supply system
17. Electric instrument automatic control system
Brief description of the main process
1) First, open the blower and purge the residual gas and other flammable and explosive gases in the furnace to prevent explosion after ignition.
2) Before ignition burner, open induced draft fan and purge furnace for five minutes. Combustion fuel natural gas is transported through pipelines and ignited by ignition burners. The heat release from the burner increases the temperature of the rotary kiln and the secondary chamber slowly.
3) Solid waste is sent into the rotary kiln by the bucket elevator through the hydraulic push feeding device, and the combustion temperature is controlled at 850ºC through the control of oxygen supplement.
The waste liquid enters the rotary kiln or secondary combustion chamber through the waste liquid pipeline (including normal temperature pipeline and thermal insulation heating pipeline).
4) The flue gas produced by the rotary kiln enters the secondary room, and the ash and slag produced by incineration is automatically discharged by the wet scraper.
5) The incinerated flue gas in the secondary combustion chamber of the organic waste liquid fuel further high temperature burning, burning temperature is to 1100 ºC, and make burning more completely, smokeless, odorless, and no secondary pollution, the effect of flue gas in the second indoor room residence time of 2.0 seconds above, to fully trace organic matter in flue gas and dioxins decomposition, The decomposition efficiency is over 99.99%, ensuring that the undecomposed organic components and carbon particles in the flue gas are completely decomposed at about 1100ºC. Multi-stage combustion is used in the secondary combustion chamber to effectively inhibit the formation of nitrogen oxides.
6) The flue gas from the secondary combustion chamber enters the waste heat steam boiler, and 10% ammonia or urea solution is sprayed into the front flue of the boiler to carry out high-temperature SNCR reduction out of stock, and the NOx in the flue gas is removed. Then the high-temperature flue gas and the boiler evaporation tube bundle conduct heat exchange, and 0.8mPAg saturated steam is produced and enters the factory pipe network. At the same time, the ash content of flue gas is further settled in the boiler cavity, which improves the cleanliness of flue gas.
7) The flue gas from the boiler enters the semi-dry quench tower. By the pressure pump, the reaction tower at the top of the two-fluid nozzle into the reaction tower, through the two-fluid nozzle atomized into small droplets, the atomized droplets are subjected to the hot flue gas upward, near the nozzle to form a high density area of the droplets are suspended, by adjusting the injection amount to control the temperature within 1 s quickly reduced to about 200 ºC, Thus the regeneration of dioxins was effectively inhibited. At the same time, some sparks in the flue gas are extinguished by spraying water mist, protecting the subsequent cloth bag from being burned.
8) Then the flue gas into the dry acid and dioxin absorption tower, equipped with carbon lime and activated carbon storage tank, carbon lime and activated carbon by the star ash discharge valve transported by high pressure wind blowing, into the connecting flue and incineration tail gas reaction, further purification of tail gas. The role of spraying carbon lime is to remove and absorb HCl, NOx and other acidic components in the flue gas, and the role of activated carbon is to adsorb and remove a small amount of residual dioxin furan in the flue gas.
9) The tail gas enters the air box bag filter to remove the fine dust trapped in the flue gas. In the dry spray tower spray carbon lime, activated carbon mixture into the bag dust collector, adsorption on the bag, not sufficient reaction adsorption of carbon lime and activated carbon continue to absorb, reaction. Dust collector is provided with bypass flue, in the bag dust collector inlet temperature is not within the limit range, the bag bypass solenoid valve is opened, the flue gas by bypass into the chimney, to ensure that the abnormal temperature of the smoke does not form a fatal damage to the bag.
10) The flue gas from the dust bag is introduced into the SCR stripping system by induced draft fan to further remove nitrogen oxides.
11) The flue gas enters the spray packing washing tower device, the main function is to wash away the acid gas in the flue gas.
12) Smoke is discharged into the air through the chimney.
Yixing Huarui Incinerator Technology Development Co., Ltd. was established in 2007, with more than 140 employees, fixed assets of 80 million yuan, covering an area of 33,000 square meters.
