Process technique for incineration tail gas of medical waste, hazardous waste and consumer waste

Abstract

The invention relates to the technical field of environment protection, in particular to a process for treating the incineration tail gas of medical waste, dangerous waste and domestic garbage. The process flow comprises the following steps: (1) firstly cooling tail gas discharged from ht-air chambers of two combustion chambers of an incinerator to 650-700 DEG C by an air cooler; (2) cooling the tail gas to not higher than 600 DEG C by a cold-smoke-gas heat-exchanger; (3) cooling the tail gas to not higher than 500 DEG C by a water cooler; (4) sharply cooling the tail gas to not higher than 200 DEG C in one minute by a primary middle-temperature fast quench tower and continuously washing and cooling the cooling the tail gas to not higher than 80 DEG C through a duplex base of the fast quench tower; (5) cooling the tail gas to not higher than 50 DEG C through neutralization and absorption in a secondary washing and deacidifying tower; (6) cooling the tail gas to not higher than 35 DEG C through condensation and dehydration; (7) drying and absorbing the cooling the tail gas at low temperature; (8) backing to the cold-smoke-gas heat-exchanger in the step (2) to heat the tail gas to 70-90 DEG C; (8) and finally dedusting by a cloth bag; and (10) exhausting the purified tail gas by an exhaust system. The invention solves the problems of incomplete purifying treatment, failures of high-temperature neutralization reaction and high-temperature absorption, low efficiency and poor effect in the prior tail gas treatment process and is especially suitable for treating harmful incineration tail gas of medical waste, dangerous waste and domestic garbage.

Description

(1) Technical field: [0001] The invention relates to the technical field of environmental protection, and relates to a process for treating medical waste, hazardous waste and domestic waste incineration tail gas. (two) background technology: [0002] The tail gas after incineration of medical waste, hazardous waste, and domestic garbage contains a large amount of harmful substances, and improper treatment will definitely cause serious secondary environmental pollution. At present, the similar process for treating tail gas includes 1. The tail gas discharged from the incinerator is first cooled to 850-950°C by an air cooler; 2. Cooled by a water cooler to 650-750°C; 3. Cooled by a quenching deacidification tower to ≤200°C; 4. Adsorbed by pre-applicator and adsorption tower and cooled to 130-180°C; 5. Dust is removed by bag, and the temperature is controlled at 130-170°C; 6. Purified tail gas is discharged through the exhaust system. After careful research, analysis and pract...

AI Technical Summary

Problems solved by technology

[0022] The purpose of the present invention is to solve the problems that the existing tail gas treatment process configuration is not in place, the temperature control is unreasonable, and the purification treatment is not thorough, and to provide a treatment process for medical waste, hazardous waste, and domestic waste incineration tail gas

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