A gradient variable temperature pyrolysis system for domestic waste treatment

Abstract

The invention discloses a gradient variable temperature pyrolysis system for domestic waste treatment, which belongs to the technical field of solid waste harmless disposal, and includes a waste feeding unit, a waste pyrolysis unit, an oil-gas separation unit, a high-temperature oxidation unit, and a waste heat utilization unit , exhaust gas treatment unit and ash discharge unit, the garbage feeding unit is connected to the garbage pyrolysis unit, the main body of the garbage pyrolysis unit is a garbage pyrolysis and combustion integrated furnace, and the garbage pyrolysis and combustion integrated furnace is in the shape of a cylinder or a rectangle as a whole. The ratio of the height of the furnace cavity to the cross-sectional area is 1 to 2. The oil-gas separation unit is connected to the garbage pyrolysis unit, the high-temperature oxidation unit is connected to the oil-gas separation unit, the waste heat utilization unit is connected to the high-temperature oxidation unit, and the tail gas treatment unit is connected to the waste heat utilization unit. The slag discharge unit is connected to the slag discharge port of the garbage pyrolysis and combustion integrated furnace. The pyrolysis system of the present invention has the characteristics of being completely sealed, oxygen-free or oxygen-limited, odorless, reasonable in cloth, and automatically and rationally divided into functional areas.

Description

technical field [0001] The invention belongs to the technical field of harmless disposal of solid waste, and more specifically relates to a gradient variable temperature pyrolysis system for domestic waste treatment. Background technique [0002] Improper disposal of domestic waste can easily cause serious environmental pollution problems. The traditional domestic waste treatment methods include incineration and landfill. Incineration will produce a large amount of harmful gas and dust particles, and there will be large air pollution; landfill will have insufficient space, serious landfill pollution, and landfill leachate. deal with difficult issues. Garbage pyrolysis is a technology that heats and decomposes waste in an oxygen-free or oxygen-deficient environment to decompose it into harmless products. It is an effective way to deal with waste. However, the existing waste pyrolysis technology has a large equipment throughput, high investment and operating costs, and is no...

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the existing technology has the above deficiencies: (1) There are problems in the process design and operation of small-scale waste pyrolysis treatment equipment, which leads to complicated follow-up flue gas treatment process and easy generation of waste water, so the investment and operation costs of flue gas treatment equipment are relatively high. (2) The technical parameters of the existing equipment are poorly controlled, the operation is not continuous, the reaction is unstable, the product composition is complex, and the treatment process cannot be stably achieved to meet the emission standards; (3) The existing low-temperature pyrolysis equipment produces a large amount of tar, while the existing The tar process produces a large amount of tar-containing wastewater, causing serious water pollution problems. At the same time, the addition of tar-containing wastewater treatment processes and equipment leads to increased process difficulty and increased investment and operating costs.

Images